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Seletividade de agrotóxicos utilizados na cultura do arroz irrigado ao fungo Metarhizium anisopliae, agente de controle microbiano de Tibraca limbativentris; Selectivity of chemical pesticides used in rice irrigated crop at fungus Metarhizium anisopliae, microbial control agent of Tibraca limbativentris

RAMPELOTTI-FERREIRA, Fátima Teresinha; FERREIRA, Anderson; PRANDO, Honório Francisco; TCACENCO, Fernando Adami; GRÜTZMACHER, Anderson Dionei; MARTINS, José Francisco da Silva
Fonte: Universidade Federal de Santa Maria Publicador: Universidade Federal de Santa Maria
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
56.47%
Para subsidiar a utilização de táticas de manejo integrado para o inseto-praga Tibraca limbativentris, avaliou-se a compatibilidade in vitro entre o isolado CG 891 de Metarhizium anisopliae e os agrotóxicos utilizados na cultura do arroz irrigado. Os parâmetros avaliados foram crescimento vegetativo, esporulação e germinação em pré e pós-contato do fungo, com duas doses de fipronil, tiametoxam, fenitrotiona, carbofurano, pirazossulfurom-etílico, bentazona, clomazona, glifosato e quincloraque; e uma dose de triciclazol e azoxistrobina. Reduções significativas no crescimento vegetativo e esporulação de M. anisopliae foram observadas para fenitrotiona, carbofurano e azoxistrobina. Observou-se redução na germinação em pré-contato para o agrotóxico azoxistrobina. O valor percentual da germinação alterou a classificação dos agrotóxicos com relação a sua seletividade sobre o entomopatógeno. No entanto, os resultados mostram que in vitro os agrotóxicos fenitrotiona, carbofurano, glifosato e azoxistrobina são prejudiciais ao isolado CG 891 de M. anisopliae.; Searching for integrated control strategies for the insect-pest Tibraca limbativentris, the in vitro compatibility between isolated CG 891 of Metarhizium anisopliae and several pesticides used in the culture of irrigated rice was evaluated. The followings parameters were studied: vegetative growth...

Mitigation of methane and nitrous oxide emissions from flood-irrigated rice by no incorporation of winter crop residues into the soil; Mitigação das emissões de metano e de óxido nitroso em planossolo sob cultivo de arroz pela manutenção dos resíduos de plantas de cobertura em superfície

Zschornack, Tiago; Bayer, Cimelio; Zanatta, Josiléia Acordi; Vieira, Frederico Costa Beber; Anghinoni, Ibanor
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Artigo de Revista Científica Formato: application/pdf
ENG
Relevância na Pesquisa
56.38%
Plantas de cobertura de inverno são fontes de C e de N em sistemas de produção de arroz irrigado, mas pouco se conhece sobre o efeito do manejo e da qualidade dos seus resíduos culturais nas emissões de metano (CH4) e de óxido nitroso (N2O) do solo. O estudo consistiu de um experimento conduzido em casa de vegetação e teve como objetivo principal avaliar a influência do manejo (incorporado ou em superfície) e do tipo de resíduos culturais (azevém e serradela) de plantas de cobertura sobre as emissões de CH4 e de N2O de um Planossolo Háplico sob cultivo de arroz irrigado por inundação. Utilizou-se o método da câmara fechada, e as concentrações de CH4 e de N2O nas amostras de ar foram determinadas por cromatografia gasosa. Coletas da solução do solo em duas profundidades (2 e 20 cm) foram realizadas simultaneamente às coletas de ar. A manutenção dos resíduos culturais na superfície do solo resultou em menor emissão de CH4 e de N2O em comparação à sua incorporação. O tipo de resíduo cultural não teve efeito na emissão de CH4, enquanto para o N2O a distinção entre os resíduos ocorreu apenas quando estes foram mantidos na superfície do solo – condição na qual as maiores emissões ocorreram com a adição dos resíduos da leguminosa (serradela). O processo mais intenso de redução do solo em subsuperfície (20 cm)...

Mitigation of methane and nitrous oxide emissions from flood-irrigated rice by no incorporation of winter crop residues into the soil

Zschornack,Tiago; Bayer,Cimélio; Zanatta,Josiléia Acordi; Vieira,Frederico Costa Beber; Anghinoni,Ibanor
Fonte: Sociedade Brasileira de Ciência do Solo Publicador: Sociedade Brasileira de Ciência do Solo
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2011 EN
Relevância na Pesquisa
56.38%
Winter cover crops are sources of C and N in flooded rice production systems, but very little is known about the effect of crop residue management and quality on soil methane (CH4) and nitrous oxide (N2O) emissions. This study was conducted in pots in a greenhouse to evaluate the influence of crop residue management (incorporated into the soil or left on the soil surface) and the type of cover-crop residues (ryegrass and serradella) on CH4 and N2O emissions from a flooded Albaqualf soil cultivated with rice (Oryza sativa L.). The closed chamber technique was used for air sampling and the CH4 and N2O concentrations were analyzed by gas chromatography. Soil solution was sampled at two soil depths (2 and 20 cm), simultaneously to air sampling, and the contents of dissolved organic C (DOC), NO3-, NH4+, Mn2+, and Fe2+ were analyzed. Methane and N2O emissions from the soil where crop residues had been left on the surface were lower than from soil with incorporated residues. The type of crop residue had no effect on the CH4 emissions, while higher N2O emissions were observed from serradella (leguminous) than from ryegrass, but only when the residues were left on the soil surface. The more intense soil reduction verified in the deeper soil layer (20 cm)...

Globe fringerush (Fimbristylis miliacea) cross resistance to als-inhibitor herbicides under field conditions in irrigated rice in the south of Brazil

Schaedler,C.E.; Noldin,J.A.; Eberhardt,D.S.; Agostinetto,D.; Burgos,N.R.
Fonte: Sociedade Brasileira da Ciência das Plantas Daninhas Publicador: Sociedade Brasileira da Ciência das Plantas Daninhas
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2013 EN
Relevância na Pesquisa
56.55%
ALS-inhibiting herbicides usually provide adequate weed control in irrigated rice fields. After consecutive years of use, the Cyperaceae species, globe fringerush (Fimbristylis miliacea) began to show resistance to ALS (acetolactate synthase) inhibitors. Globe fringerush is one of the most problematic herbicide-resistant weeds in irrigated rice in the state of Santa Catarina in the South of Brazil. The objective of this research was to examine cross resistance of globe fringerush to ALS inhibitors, under field conditions. Two experiments were conducted in a rice field naturally infested with ALS-resistant globe fringerush in Santa Catarina, in the 2008/09 and 2009/10 cropping seasons. The experimental units were arranged in randomized complete block design, with five replicates, consisting of two factors (herbicide and dose) in a 4 x 5 factorial arrangement. ALS herbicides included bispyribac-sodium, ethoxysulfuron, pyrazosulfuron-ethyl and penoxsulam. Six-leaf globe fringerush was sprayed with herbicide doses of 0, 0.5, 1, 2 and 4X the recommended doses in a spray volume of 200 L ha-1. The number of rice culm, filled and sterile grains, plant height, dry shoot biomass and grain yield were recorded. Globe fringerush control was evaluated 28 and 70 days after herbicide application (DAA); shoots were harvested at 13 weeks after herbicide application and dry weight recorded. Competition with globe fringerush reduced the number of culm and rice grain yield. The globe fringerush biotype in this field was resistant to all ALS herbicides tested. Penoxsulam had the highest level of activity among treatments at 28 and 70 DAA...

Development of rice lines with gene introgression from the wild Oryza glumaepatula by the AB-QTL methodology.

RANGEL, P. H. N.; BRONDANI, C.; RANGEL, P. N.; BRONDANI, R. P. V.; ZIMMERMANN, F. J. P.
Fonte: Crop Breeding and Applied Biotechnology, Viçosa, MG, v. 5, n. 1, p. 10-19, Mar. 2005. Publicador: Crop Breeding and Applied Biotechnology, Viçosa, MG, v. 5, n. 1, p. 10-19, Mar. 2005.
Tipo: Artigo em periódico indexado (ALICE)
EN
Relevância na Pesquisa
56.38%
Wild rice of the species Oryza glumaepatula is found Brazil and has been used to broaden the genetic basis of irrigated rice populations in Embrapa breeding programmes. The objective of this study was to demonstrate and discuss approaches used in the development of Oryza sativa lines containing genes transferred from Oryza glumaepatula, resulting in introgression lines with a broader genetic basis and high yield. First of all, genes were transferred from the wild species to cultivated rice by the AB-QTL methodology. Eighteen families were selected using QTL analysis and agronomical performance data. After the heterosis test, the families CNAi 9020 and CNAi 9024 were selected and submitted to microsatellite marker-assisted selection. Thirty-five lines were then selected with high plant vigour, high tiller and panicle number per plant, high grain yield of the main crop, and a strong regrowth capacity which makes the use of ratoons a feasible alternative.; 2005

Genetic gain in an improvement program of irrigated rice in Minas Gerais.

SOARES, P. C.; MELO, P. G. S.; MELO, L. C.; SOARES, A. A.
Fonte: Crop Breeding and Applied Biotechnology, Viçosa, MG, v. 5, n. 2, p. 142-148, June 2005. Publicador: Crop Breeding and Applied Biotechnology, Viçosa, MG, v. 5, n. 2, p. 142-148, June 2005.
Tipo: Artigo em periódico indexado (ALICE)
EN
Relevância na Pesquisa
56.35%
An evaluation of the genetic improvement programme of irrigated rice of Minas Gerais (Brazil) estimated the genetic gain obtained in the 90s. Grain yield data of the advanced comparative trials of cultivars and lines of continuously flooded rice, conducted from 1990-91 to 2000-01, were used. The estimate of the genetic gain was obtained by the methodology of the adjusted means proposed by Breseghello (1998). The mean annual genetic gain in the 90s was 42.45+or-17.89 kg ha-1 (0.7% per year). The improvement programme proved auspicious for the development of lines that outmatched the controls. The mean of the cultivars released in the 90s did however not outstrip the mean of the elite lines, which were the genotypes with the highest means in this study and will be further evaluated in the ongoing programme.; 2005

BRSMG Predileta: irrigated rice cultivar for lowlands in Minas Gerais, Brazil.

SOARES, P. C.; SOARES, A. A.; CORNÉLIO, V. M. de O.; REIS, M. de S.; MORAIS, O. P. de; CUTRIM, V. dos A.; VIEIRA, A. R.; ARAÚJO, R. F.; BAFFA, D. C. F.; COSTA, J. C.; RIBEIRO, R. M.; SILVA, F. L. da.
Fonte: Crop Breeding and Applied Biotechnology, Viçosa, MG, v. 8, n. 3, p. 219-222, 2008. Publicador: Crop Breeding and Applied Biotechnology, Viçosa, MG, v. 8, n. 3, p. 219-222, 2008.
Tipo: Artigo em periódico indexado (ALICE)
EN
Relevância na Pesquisa
56.38%
The cultivar of irrigated rice BRSMG Predileta has high grain yield, resistance to the main rice diseases and produces good quality grains for industry and cooking. It was recommended in 2007 by the Genetic Improvement Program for lowland rice in Minas Gerais, developed by EPAMIG in partnership with Embrapa Arroz e Feijão.; 2008

Absorção de N, P, K, Ca, Mg e S pelo arroz irrigado influenciada pela adubação nitrogenada; N, P, K, Ca, Mg and S absorption influenced by nitrogen fertilizing in irrigated rice

Fonte: Editora da Universidade Federal de Lavras Publicador: Editora da Universidade Federal de Lavras
Tipo: Artigo de Revista Científica Formato: text/html
PT
Relevância na Pesquisa
66.58%
Taking in account that, there is no available method to adequately evaluate the soil nitrogen availability for plants, there is no way to trace calibration curve for this element, therefore, there is a research needs to establish answer curves in relation to nitrogen rates, as well as, to evaluate different cultivar responses. One experiment in greenhouse conditions was conducted at Soil Science Department of the Federal University of Lavras to evaluate the nitrogen rate effects on grain yield and to estimate the macronutrients (N, P, K, Ca, Mg and S) absorption and exportation by three irrigated rice cultivars. A completely randomized design with four replicates in factorial arrangement (5 by 3) using 3 irrigated rice cultivars, (Capivari, Inca e Sapucaí) and 5 nitrogen rates (O, 1OO, 2OO, 4OO e 8OO mg of N. kg-1 of soil) as factors were used. Nitrogen rates, in urea form, were applied in three times at 10, 30 and 50 days after emerging using 30%, 30% and 40% of the total rate, respectively. Capivari presented greater nitrogen absorption than Inca and Sapucaí rice cultivars. Differential grain yield rate responses were presented by cultivars, and 800 mg of N. kg-1 of soil was not enough for Capivari to reach its maximum yield. Capivari rice cultivar had the greatest yield among all cultivars...

A competitividade do arroz irrigado brasileiro no Mercosul; The competitiveness of Brazilian irrigated rice in Mercosul

Fonte: Organizações Rurais & Agroindustriais Publicador: Organizações Rurais & Agroindustriais
Tipo: Artigo de Revista Científica Formato: application/pdf
POR
Relevância na Pesquisa
56.4%
This article evaluates the competitiveness of irrigated rice produced in Brazil, Uruguay and Argentina, the main partners in the commerce of this cereal. The rice production costs, the agricultural policies, the exchange rates and the common external tariff (CET) in the three countries are analyzed comparatively. The research shows that the rice produced in Argentina is the most competitive of the region, due to the lower production costs per hectare and per bag of 50 kg, followed by Uruguay and Brazil. Regarding the agricultural policy of each country, in Brazil policies are mainly oriented towards rural credit and short term actions, with reduced subsidies for large scale farmers and protection of family agriculture. In Uruguay, the agricultural policies are centered on research, rural assistance, campaigns against diseases and plagues and inspection services. In this country, rural financing is predominantly in US dollars with market interest rates. In Argentina, the farmers are inserted in a market economy without state subsidy. The study also shows that the changes in the exchange policy and the alterations in the common external tariff (TEC) affect the prices of the rice in the region and are prejudicial to competition.

Aduba????o fosfatada para o arroz irrigado em solos com diferentes capacidades de adsor????o de f??sforo; Phosphorus fertilization for irrigated rice in soils with different phosphorus adsorption capacities.

CARDOSO, Eduardo Flores
Fonte: Universidade Federal de Pelotas; Agronomia; Programa de P??s-Gradua????o em Agronomia; UFPel; BR Publicador: Universidade Federal de Pelotas; Agronomia; Programa de P??s-Gradua????o em Agronomia; UFPel; BR
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
66.7%
In irrigated rice crop, the lowland soils can supply the plants with different phosphorus quantities due to the source material and phenomena that occur in the different oxidation and reduction cycles of these soils. An important soil factor that regulates the phosphorus availability for the plants is the maximum phosphorus adsorption capacity. Therefore, the objectives of this work were to evaluate the response of the irrigated rice fertilized with two sources of phosphorus in lowland soils with different phosphorus adsorption capacity and to evaluate the prediction capacity of the methods Mehlich-1 and Ionic Exchange Resin in Sphere regarding the phosphorus availability for the irrigated rice in these soils. The soil samples were taken from the top 20 cm of three lowland soils with different maximum phosphorus adsorption capacity (MPAC): Typic Albaqualf, low MPAC; Vertic Albaqualf, average MPAC and Typic Endoaqualf, high MPAC. The experimental units were constituted of plastic buckets containing 6 kg of dry soil, where two phosphorus sources (phosphate rock and triple superphosphate) and six levels of phosphorus: 0, 10, 20, 40, 80, 160 mg kg-1 P were applied, with three replications, totaling 128 experimental units. The pots were positioned in the greenhouse in a completely randomized experimental design. The rice was cultivated for 45 days and the dry matter weight was quantified through aerial part of the plants. The phosphorus content was analyzed by extractor Mehlich-1 and Resin methods in the soil...

Recobrimento de sementes de arroz irrigado com zinco; Coating of irrigated rice seeds with

FUNGUETTO, Claudete Izabel
Fonte: Universidade Federal de Pelotas; Agronomia; Programa de P??s-gradua????o em Ci??ncia e Tecnologia de Sementes; UFPel; BR Publicador: Universidade Federal de Pelotas; Agronomia; Programa de P??s-gradua????o em Ci??ncia e Tecnologia de Sementes; UFPel; BR
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
56.47%
The objective of this research was to evaluate the response of irrigated rice cultivars BRS 7 Taim and IRGA 417 to seed coating with micronutrient, fungicide and polymer. The experiment was conducted in laboratory and in greenhouse conditions. Seed treatment was done using a mixture of Zn sulphate heptahydrated (pure formulation) + 3.0 mL carboxim + thiram fungicides + 200 mg CF Clear ?? polymer + 4.0 mL color + 15 mL of water.kg -1 of seed. Dosage of micronutrient tested were zero; 0.37; 0.47; 0.57; 0.67 e 0.77 g/Zn.kg -1 of seeds. Seed quality evaluations were done through the following tests: standard germination; first count of germination; length of aerial and root parts and dry biomass of aerial and root parts of seedlings; number of panicles per plant; number of grains per panicle and grain weight per plant. Statistical design was completely randomize wit three replications. Results showed that seed coating with micronutrient Zn, fungicide and polymer did not adversely affect germination of irrigated rice, it was different between cultivars and shows high correlation for most analyzed parameters and for germination under sub-optimal temperature conditions. Number of grains per panicle and weight of grains per plant were positively correlated with Zn dosage...

Perfil dos produtores de arroz irrigado da fronteira oeste do RS, ligados a Pirahy Alimentos; Profile of the producers irrigated rice(Orizum sativum L.), suppliers-partners of the agroindustria Pirahy Foods

BONETTI, Alberto dos Santos
Fonte: Universidade Federal de Pelotas; Agronomia; Programa de P??s-gradua????o em Ci??ncia e Tecnologia de Sementes; UFPel; BR Publicador: Universidade Federal de Pelotas; Agronomia; Programa de P??s-gradua????o em Ci??ncia e Tecnologia de Sementes; UFPel; BR
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
66.61%
The present work had how I aim to obtain informations on current situation of producers irrigated rice (orizum sativum l.), suppliers-partners of the Agroind??stria Pirahy Food, in Saint western Borja-frontier of the Rio Grande do Sul, carried out through pesquiza carried out with producers of irrigated rice located in the local authorities of Saint Borja, Itaqui, Bed, in the western frontier of the Rio Grande do Sul, harvest 2006-2007. These informations were analysed as for productivity, use of the land, area of cultivation, access, system of cultivation, dimenssion machines, type of sowing, equipment of pulverizizacao, it plots of harvest, type, dimenssion and of energy of the system of irrigation, system of evaluation of the of the fertility and correction of the acidity of the ground, use, use, you cultivate, density and time of sowing, realization of Integrated Handling of Nuisances, control of nuisances and diseases, time of harvest, I handle powders-harvests, drying and storage, and realization and control of costs of production and realization of qualification of colabroradores in the lavouras. They allowed the obtained results to end that the middle productivity from 7 to 8 tons per hectare; 66 % of the producers uses leased lands and or partnerships; 84 % of the producers cultivates even 400ha; 88 % of the producers happens least cultivation and in 9 % they associate the least cultivation to a conventional one; the access roads of 80 % of the producers it has easy access itself when haste is taking place in the harvest time; 72 % carries out the dimensionamentos of machines in accordance with the area of cultivation; 98 % uses machines of movement and preparation of the ground...

Mat??ria org??nica em Planossolo H??plico sob sistemas de manejo no cultivo do arroz irrigado no Sul do Brasil; Organic matter in Albaqualf as affected by managements irrigated rice cropping systems the South from Brazil

ROSA, Carla Machado da
Fonte: Universidade Federal de Pelotas; Agronomia; Programa de P??s-Gradua????o em Solos; UFPel; BR Publicador: Universidade Federal de Pelotas; Agronomia; Programa de P??s-Gradua????o em Solos; UFPel; BR
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
66.63%
In the south region from Rio Grande do Sul State, in,Brazil, 950 thousand hectares of soils are cultivated with rice, an important agricultural activity in that region, under an irrigation (flooded) system, using different soil management techniques. Studies regarding the organic matter (OM) dynamic in these soils are incipient, so this work aimed to evaluate the effect of irrigated rice management systems on the composition and quality of the OM from an Albaqualf, as well as, to investigate the OM stabilization mechanisms in this soil. Soil samples were collected in a long-term field experiment (21 years), from the 0-0,025, 0,025-0,05, 0,05-0,10 and 0,10-0,20 meters. The treatments evaluated are: ST traditional rice crop system: one year with rice crop under conventional tillage and two years of fallow; APC continuous rice crop system under conventional tillage and weeds control with herbicides; APD no-tillage system with rye-grass in the winter and rice in the summer; SN soil under natural conditions with native grassland. Soil samples were submitted to OM physical fractionation, and total organic carbon (TOC) and C contend in fractions were determinate by dry combustion analyzer, and carbon stocks adjusted according to the equivalent soil s mass. The chemical and molecular characteristics from this soil and OM fraction were determined by FTIR spectroscopy...

Methane emission from irrigated rice cultivation: Quantities, models and practice

Huang, Yao
Fonte: Universidade Rice Publicador: Universidade Rice
ENG
Relevância na Pesquisa
56.48%
Three experiments focused on the contribution of rice productivity to methane emission were conducted in Texas flooded rice paddy soils during 1994-95 growing seasons. Measurements of methane emission from different rice paddy soils during 1991-92 growing seasons (Sass et al., 1994) and from ten different cultivars in 1993 growing season (Willis, 1995; Sass and Fisher, 1995) were cited to quantify the relationships of methane emission with soil, rice cultivar and grain yield. Under the similar soil sand content and agronomic management regime, total seasonal methane emission was positively correlated with rice grain yield and aboveground biomass at harvest. Linear relationships of daily methane emission with aboveground vegetative biomass and root biomass were also observed. On a carbon to carbon basis, the ratio of methane emission to rice net primary productivity was dependent on soil and rice variety, and increased with rice plant development. Models emphasized the contributions of rice plants to the processes of methane production, oxidation and emission and also the influence of environmental factors were developed to predict methane emission from flooded rice fields. Relative effects of soil texture, soil temperature and rice variety on methane production/emission were quantified by three dimensionless indices: soil index...

A new approach to evaluate regional methane emission from irrigated rice paddies: Combining process study, modeling and remote sensing into GIS

Ding, Aiju
Fonte: Universidade Rice Publicador: Universidade Rice
ENG
Relevância na Pesquisa
56.55%
A large seasonal variation in methane emission from Texas rice fields was observed in most of the growing seasons from 1989 through 1997. In general, the pattern showed small fluxes in the early season of cultivation and reached maximum at post-heading time, then declined and stopped after fields were drained. The amount of methane emission positively relates to the aboveground biomass, the number of effective stems and tillers, and nitrogen addition. The day-to-day pattern of methane emissions was similar among all cultivars. The seasonal total methane emission shows a significant positive correlation with post-heading plant height. The total methane emission from Texas rice fields was estimated as 33.25 x 109 g in 1993, ranging from 25.85 x 109 g/yr to 40.65 x 109 g/yr. A mitigation technique was developed to obtain both high yield and less methane emission from Texas rice fields. A new approach was also developed to evaluate regional to large-scale methane emission from irrigated rice paddies. By combining modeling, ground truth information and remote sensing into a Geographic Information System (GIS)---a computer based system, the seasonal methane emission from a large area can be calculated efficiently and more accurately. The methodology was tested at the Richmond Irrigation District (RID) site in Texas. The average daily methane emission varied from field to field and even within a single field. The calculated seasonal total methane emission from RID rice fields was as low as 3.34 x 108 g CH4 in 1996 and as high as 7.80 x 108 g CH4 in 1998. To support the application of the estimation method in a worldwide study...

Disintegration, formalisation or reinvention? Contemplating the future of Balinese irrigated rice societies

Lorenzen, Rachel P.
Fonte: Taylor & Francis Publicador: Taylor & Francis
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
56.44%
Bali's rice production is organised in units called subak with compulsory membership for farmers who grow rice. The future of this highly productive system generating some of the highest yields across Indonesia is under threat. Urbanisation, rural diversification and tourism are encroaching on the immaculately groomed rice terraces, undermining a centuries-old sociocultural institution which, interwoven with kinship, neighbourhood and congregation groups, shapes Balinese society. Nonetheless, rice farming remains a vital source of income for many and rice the most important staple food. This predicament raises questions about the future of farmers' livelihoods, the subak, its cultural heritage and rice production in Bali. The author contemplates possible trajectories by developing three scenarios: (1) disintegration; (2) formalisation; and (3) reinvention. The resulting structured narratives are not forecasts but may encourage discussion of the place and value of the subak and local rice supply in the Balinese economy and society.

Development of herbicide-tolerant irrigated rice cultivars

Rangel,Paulo Hideo Nakano; Moura Neto,Francisco Pereira; Fagundes,Paulo Ricardo Reis; Magalhães Junior,Ariano Martins de; Morais,Orlando Peixoto de; Schmidt,Andréa Branco; Mendonça,João Antônio; Santiago,Carlos Martins; Rangel,Priscila Nascimento; Cu
Fonte: Embrapa Informação Tecnológica; Pesquisa Agropecuária Brasileira Publicador: Embrapa Informação Tecnológica; Pesquisa Agropecuária Brasileira
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/2010 EN
Relevância na Pesquisa
56.61%
The objective of this work was to develop new irrigated rice lines tolerant to imidazolinone herbicides. The backcross breeding procedure was used to transfer the imidazolinone tolerance allele from mutant 93AS3510 to the recurrent parents 'BRS 7 Taim' and 'BRS Pelota'. Individual herbicide-tolerant plants were selected in each generation, for three backcrossings (RC1 to RC3), followed by three selfing generations (RC3F1 to RC3F3). The best four RC3F3 lines for agronomic traits were genotyped with 44 microsatellite markers. The observed conversion index of the new imidazolinone-tolerant lines varied from 91.86 to 97.67%. Pairwise genetic distance analysis between these lines and 22 accessions from the Embrapa's Rice Germplasm Bank clustered the new lines with their respective recurrent parents, but not with 'IRGA 417', which was originally used as recurrent parent to derive IRGA 422 CL, the only imidazolinone-tolerant irrigated rice cultivar recommended for cultivation in Brazil. Therefore, these lines represent new options of genetically diverse imidazolinone-tolerant rice accessions. Lines CNA10756 ('BRS Sinuelo CL') and CNA10757 will be released for cultivation in the Clearfield irrigated rice production system in Rio Grande do Sul...

Development of herbicide-tolerant irrigated rice cultivars.

RANGEL, P. H. N.; MOURA NETO, F. P.; FAGUNDES, P. R. R.; MAGALHAES JÚNIOR, A. M. de; MORAIS, O. P. de; SCHMIDT, A. B.; MENDONÇA, J. A.; SANTIAGO, C. M.; RANGEL, P. N.; CUTRIM, V. dos A.; FERREIRA, M. E.
Fonte: Pesquisa Agropecuária Brasileira, Brasília, DF, v. 45, n. 7, p. 701-708, jul. 2010. Publicador: Pesquisa Agropecuária Brasileira, Brasília, DF, v. 45, n. 7, p. 701-708, jul. 2010.
Tipo: Artigo em periódico indexado (ALICE)
EN
Relevância na Pesquisa
56.61%
The objective of this work was to develop new irrigated rice lines tolerant to imidazolinone herbicides. The backcross breeding procedure was used to transfer the imidazolinone tolerance allele from mutant 93AS3510 to the recurrent parents 'BRS 7 Taim' and 'BRS Pelota'. Individual herbicide-tolerant plants were selected in each generation, for three backcrossings (RC1 to RC3), followed by three selfing generations (RC3F1 to RC3F3). The best four RC3F3 lines for agronomic traits were genotyped with 44 microsatellite markers. The observed conversion index of the new imidazolinone-tolerant lines varied from 91.86 to 97.67%. Pairwise genetic distance analysis between these lines and 22 accessions from the Embrapa?s Rice Germplasm Bank clustered the new lines with their respective recurrent parents, but not with 'IRGA 417', which was originally used as recurrent parent to derive IRGA 422 CL, the only imidazolinone-tolerant irrigated rice cultivar recommended for cultivation in Brazil. Therefore, these lines represent new options of genetically diverse imidazolinone-tolerant rice accessions. Lines CNA10756 ('BRS Sinuelo CL') and CNA10757 will be released for cultivation in the Clearfield irrigated rice production system in Rio Grande do Sul...

Development of herbicide-tolerant irrigated rice cultivars.

RANGEL, P. H. N.; MOURA NETO, F. P.; FAGUNDES, P. R. R.; MAGALHAES JÚNIOR, A. M. de; MORAIS, O. P. de; SCHMIDT, A. B.; MENDONÇA, J. A.; SANTIAGO, C. M.; RANGEL, P. N.; CUTRIM, V. dos A.; FERREIRA, M. E.
Fonte: Pesquisa Agropecuária Brasileira, Brasília, DF, v. 45, n. 7, p. 701-708, jul. 2010. Publicador: Pesquisa Agropecuária Brasileira, Brasília, DF, v. 45, n. 7, p. 701-708, jul. 2010.
Tipo: Artigo em periódico indexado (ALICE)
EN
Relevância na Pesquisa
56.61%
The objective of this work was to develop new irrigated rice lines tolerant to imidazolinone herbicides. The backcross breeding procedure was used to transfer the imidazolinone tolerance allele from mutant 93AS3510 to the recurrent parents 'BRS 7 Taim' and 'BRS Pelota'. Individual herbicide-tolerant plants were selected in each generation, for three backcrossings (RC1 to RC3), followed by three selfing generations (RC3F1 to RC3F3). The best four RC3F3 lines for agronomic traits were genotyped with 44 microsatellite markers. The observed conversion index of the new imidazolinone-tolerant lines varied from 91.86 to 97.67%. Pairwise genetic distance analysis between these lines and 22 accessions from the Embrapa?s Rice Germplasm Bank clustered the new lines with their respective recurrent parents, but not with 'IRGA 417', which was originally used as recurrent parent to derive IRGA 422 CL, the only imidazolinone-tolerant irrigated rice cultivar recommended for cultivation in Brazil. Therefore, these lines represent new options of genetically diverse imidazolinone-tolerant rice accessions. Lines CNA10756 ('BRS Sinuelo CL') and CNA10757 will be released for cultivation in the Clearfield irrigated rice production system in Rio Grande do Sul...

Development of herbicide-tolerant irrigated rice cultivars.

RANGEL, P. H. N.; MOURA NETO, F. P.; FAGUNDES, P. R. R.; MAGALHAES JUNIOR, A. M. de; MORAIS, O. P. de; SCHMIDT, A. B.; MENDONCA, J. A.; SANTIAGO, C. M.; RANGEL, P. N.; CUTRIM, V. dos A.; FERREIRA, M. E.
Fonte: Pesquisa Agropecuaria brasileira., Brasília, v.45, n.7, p.701-708, jul. 2010 Publicador: Pesquisa Agropecuaria brasileira., Brasília, v.45, n.7, p.701-708, jul. 2010
Tipo: Artigo em periódico indexado (ALICE)
EN
Relevância na Pesquisa
56.61%
Abstract ? The objective of this work was to develop new irrigated rice lines tolerant to imidazolinone herbicides. The backcross breeding procedure was used to transfer the imidazolinone tolerance allele from mutant 93AS3510 to the recurrent parents 'BRS 7 Taim' and 'BRS Pelota'. Individual herbicide-tolerant plants were selected in each generation, for three backcrossings (RC1 to RC3), followed by three selfing generations (RC3F1 to RC3F3). The best four RC3F3 lines for agronomic traits were genotyped with 44 microsatellite markers. The observed conversion index of the new imidazolinone-tolerant lines varied from 91.86 to 97.67%. Pairwise genetic distance analysis between these lines and 22 accessions from the Embrapa's Rice Germplasm Bank clustered the new lines with their respective recurrent parents, but not with 'IRGA 417', which was originally used as recurrent parent to derive IRGA 422 CL, the only imidazolinone-tolerant irrigated rice cultivar recommended for cultivation in Brazil. Therefore, these lines represent new options of genetically diverse imidazolinone-tolerant rice accessions. Lines CNA10756 ('BRS Sinuelo CL') and CNA10757 will be released for cultivation in the Clearfield irrigated rice production system in Rio Grande do Sul...