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Biblioteca(s): |
Embrapa Arroz e Feijão. |
Data corrente: |
18/02/2016 |
Data da última atualização: |
13/09/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
FAGERIA, N. K.; SANTOS, A. B. dos. |
Afiliação: |
NAND KUMAR FAGERIA, CNPAF; ALBERTO BAETA DOS SANTOS, CNPAF. |
Título: |
Agronomic evaluation of lowland rice genotypes for potassium-use efficiency. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
Communications in Soil Science and Plant Analysis, New York, v. 46, n. 11, p. 1327-1344, 2015. |
DOI: |
10.1080/00103624.2015.1033535 |
Idioma: |
Inglês |
Conteúdo: |
Lowland rice is an important crop for humans, and information on potassium (K)?use efficiency for this crop is limited. A greenhouse experiment was conducted to evaluate agronomic characteristics of 12 lowland rice genotypes for K utilization. The K levels used were 0 mg kg−1 (low, natural level of soil) and 300 mg kg−1 (high). Plant height, straw yield, grain yield, panicle number, grain harvest index, 1000-grain weight, and spikelet sterility were significantly affected by K and genotypes treatments. The K × genotype interactions were significant for most of these growth, yield, and yield components, indicating that genotypes responded differently under two K rates. Furthermore, selection is possible for low as well as high K rates for lowland rice genotypes. Contribution of growth and yield components and agronomic efficiency in improving grain yield was in the order of agronomic efficiency > grain harvest index> 1000-grain weight > panicle number > shoot dry weight. There was significant decrease in soil K at harvest at low as well as at high K levels, indicating greater K requirements for lowland rice genotypes. Further, rice genotypes were significantly different in uptake and utilization of P, K, Al, and H+Al, as indicated by soil analysis at harvest. |
Thesagro: |
Arroz; Genótipo; Oryza sativa; Potássio; Raíz. |
Thesaurus NAL: |
Grain yield; Rice; Roots; Yield components. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
Marc: |
LEADER 02031naa a2200253 a 4500 001 2037507 005 2019-09-13 008 2015 bl uuuu u00u1 u #d 024 7 $a10.1080/00103624.2015.1033535$2DOI 100 1 $aFAGERIA, N. K. 245 $aAgronomic evaluation of lowland rice genotypes for potassium-use efficiency.$h[electronic resource] 260 $c2015 520 $aLowland rice is an important crop for humans, and information on potassium (K)?use efficiency for this crop is limited. A greenhouse experiment was conducted to evaluate agronomic characteristics of 12 lowland rice genotypes for K utilization. The K levels used were 0 mg kg−1 (low, natural level of soil) and 300 mg kg−1 (high). Plant height, straw yield, grain yield, panicle number, grain harvest index, 1000-grain weight, and spikelet sterility were significantly affected by K and genotypes treatments. The K × genotype interactions were significant for most of these growth, yield, and yield components, indicating that genotypes responded differently under two K rates. Furthermore, selection is possible for low as well as high K rates for lowland rice genotypes. Contribution of growth and yield components and agronomic efficiency in improving grain yield was in the order of agronomic efficiency > grain harvest index> 1000-grain weight > panicle number > shoot dry weight. There was significant decrease in soil K at harvest at low as well as at high K levels, indicating greater K requirements for lowland rice genotypes. Further, rice genotypes were significantly different in uptake and utilization of P, K, Al, and H+Al, as indicated by soil analysis at harvest. 650 $aGrain yield 650 $aRice 650 $aRoots 650 $aYield components 650 $aArroz 650 $aGenótipo 650 $aOryza sativa 650 $aPotássio 650 $aRaíz 700 1 $aSANTOS, A. B. dos 773 $tCommunications in Soil Science and Plant Analysis, New York$gv. 46, n. 11, p. 1327-1344, 2015.
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