Data/hora: 23/09/2024 23:44:57

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	B - 1	
Data corrente: 	08/07/2010	
Data da última atualização: 	06/06/2022	
Autoria: 	FAGERIA, N. K.; SANTOS, A. B. dos; MORAES, M. F.	
Afiliação: 	NAND KUMAR FAGERIA, CNPAF; ALBERTO BAETA DOS SANTOS, CNPAF; M. F. MORAES, ESALQ.	
Título: 	Influence of urea and ammonium sulfate on soil acidity indices in lowland rice production.	
Ano de publicação: 	2010	
Fonte/Imprenta: 	Communications in Soil Science and Plant Analysis, v. 41, n. 13, p. 1565-1575, Jul. 2010.	
DOI: 	https://doi.org/10.1080/00103624.2010.485237	
Idioma: 	Inglês	
Conteúdo: 	Urea and ammonium sulfate are principal nitrogen (N) sources for crop production. Two field experiments were conducted during three consecutive years to evaluate influence of urea and ammonium sulfate application on grain yield, soil pH, calcium (Ca) saturation, magnesium (Mg) saturation, base saturation, aluminum (Al) saturation, and acidity (H + Al) saturation in lowland rice production. Grain yield was significantly influenced by urea as well as ammonium sulfate fertilization. Soil pH linearly decreased with the application of N by ammonium sulfate and urea fertilizers. However, the magnitude of the pH decrease was greater by ammonium sulfate than by urea. The Ca and Mg saturations were decreased at the greater N rates compared to low rates of N by both the fertilizer sources. The Al and acidity saturation increased with increasing N rates by both the fertilizer sources. However, these acidity indices were increased more with the application of ammonium sulfate compared with urea. Rice grain yield had negative associations with pH, Ca saturation, Mg saturation, and base saturation and positive associations with Al and acidity saturation. This indicates that rice plant is tolerant to soil acidity.	
Thesagro: 	Acidez do solo; Arroz; Calcio; Oryza sativa; Ureia.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/18873/1/Urea.pdf	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (29960-1) - UPC - AP - DD - 2010 -  - 2010 - DIS