Data/hora: 05/06/2024 09:20:22

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	18/02/2016	
Data da última atualização: 	13/09/2019	
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&#8722;1 (low, natural level of soil) and 300 mg kg&#8722;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	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (33932-1) - UPC - AP - DD - 2015 -  - 2015 - DIS