Rice in “Cerrado” soils with water deficiency, and its response to phosphorus
Results of three field experiments show that water is the main limiting factor in upland rice production in Cerrado soils. When water is not the limiting factor, deficiency of phosphorus is the most limiting factor. Under normal conditions yield increases significantly up to application of 150 kg/ha P2O5. When water is limiting, application of phosphorus does not help in increasing yield. Maximum water requirement of upland rice is about one week before flowering. Upland rice consumes 30% of its total water requirement as vegetative growth period, 55% during reproductive growth period and 15% during ripening growth period. Water deficiency during reproductive growth stage causes high sterility and decrease in grain weight, thereby reducing grain yield.
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Pesquisa Agropecuaria Brasileira
2014
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rev-pab-br-article-165362014-04-15T19:32:35Z Rice in “Cerrado” soils with water deficiency, and its response to phosphorus Deficiência hídrica em arroz de cerrado e resposta ao fósforo Fageria, Nand Kumar water balance; evapotranspiration; vegetative growth period; phosphorus deficiency hídrico; evapotranspiração; fase de desenvolvimento; deficiência de fósforo Results of three field experiments show that water is the main limiting factor in upland rice production in Cerrado soils. When water is not the limiting factor, deficiency of phosphorus is the most limiting factor. Under normal conditions yield increases significantly up to application of 150 kg/ha P2O5. When water is limiting, application of phosphorus does not help in increasing yield. Maximum water requirement of upland rice is about one week before flowering. Upland rice consumes 30% of its total water requirement as vegetative growth period, 55% during reproductive growth period and 15% during ripening growth period. Water deficiency during reproductive growth stage causes high sterility and decrease in grain weight, thereby reducing grain yield. Os resultados de três experimentos de campo mostram que a água é o fator mais limitante na produção de arroz de sequeiro, em solos de cerrados. Quando a água não é fator limitante, a deficiência de fósforo é o fator mais limitante. Em condições normais, a aplicação de fósforo até 150 kg/ha de P2O5 aumenta a produção significativamente Quando a água é limitante, a aplicação de fósforo não aumenta a produção. O arroz consome a máxima quantidade de água, aproximadamente uma semana antes da floração. Em relação ao consumo total de água, o arroz consome 30% durante a fase vegetativa, 55% durante a fase reprodutiva e 15% durante a fase de maturação. Deficiência hídrica durante a fase reprodutiva aumenta a esterilidade, decresce o peso dos grãos e diminui a produção. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira 2014-04-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/16536 Pesquisa Agropecuaria Brasileira; v.15, n.3, mar. 1980; 259-265 Pesquisa Agropecuária Brasileira; v.15, n.3, mar. 1980; 259-265 1678-3921 0100-104x por https://seer.sct.embrapa.br/index.php/pab/article/view/16536/10814 |
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Fageria, Nand Kumar |
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Fageria, Nand Kumar Rice in “Cerrado” soils with water deficiency, and its response to phosphorus |
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Fageria, Nand Kumar |
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Fageria, Nand Kumar |
| title |
Rice in “Cerrado” soils with water deficiency, and its response to phosphorus |
| title_short |
Rice in “Cerrado” soils with water deficiency, and its response to phosphorus |
| title_full |
Rice in “Cerrado” soils with water deficiency, and its response to phosphorus |
| title_fullStr |
Rice in “Cerrado” soils with water deficiency, and its response to phosphorus |
| title_full_unstemmed |
Rice in “Cerrado” soils with water deficiency, and its response to phosphorus |
| title_sort |
rice in “cerrado” soils with water deficiency, and its response to phosphorus |
| description |
Results of three field experiments show that water is the main limiting factor in upland rice production in Cerrado soils. When water is not the limiting factor, deficiency of phosphorus is the most limiting factor. Under normal conditions yield increases significantly up to application of 150 kg/ha P2O5. When water is limiting, application of phosphorus does not help in increasing yield. Maximum water requirement of upland rice is about one week before flowering. Upland rice consumes 30% of its total water requirement as vegetative growth period, 55% during reproductive growth period and 15% during ripening growth period. Water deficiency during reproductive growth stage causes high sterility and decrease in grain weight, thereby reducing grain yield. |
| publisher |
Pesquisa Agropecuaria Brasileira |
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2014 |
| url |
https://seer.sct.embrapa.br/index.php/pab/article/view/16536 |
| work_keys_str_mv |
AT fagerianandkumar riceincerradosoilswithwaterdeficiencyanditsresponsetophosphorus AT fagerianandkumar deficienciahidricaemarrozdecerradoerespostaaofosforo |
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