Data/hora: 03/06/2024 14:05:04

Biblioteca(s): 	Embrapa Gado de Corte.	
Data corrente: 	19/08/2003	
Data da última atualização: 	27/04/2020	
Autoria: 	KANDA, K.; MIRANDA, C. H. B.; MACEDO, M. C. M.	
Afiliação: 	National Institute for Agro-Environmental Sciences (Tsukuba, Japan).; CESAR HERACLIDES BEHLING MIRANDA, CNPAE; MANUEL CLAUDIO MOTTA MACEDO, CNPGC.	
Título: 	Carbon an nitrogen mineralization in solis under agro-pastoral systems in subtropical Central Brazil.	
Ano de publicação: 	2002	
Fonte/Imprenta: 	Soil Science and Plant Nutrition, Tokyo, v. 48, n. 2, p. 174-184, 2002.	
Idioma: 	Inglês	
Notas: 	CNPGC.	
Conteúdo: 	Agro-pastoral systems that combine soybean and grrasses in crop rotation have been recommended to sustain grassland productivity in the subtropical soils of Central Brazil (Cerrados forest area) with a low-fertility. In 1999, soil samples were taken during a field experiment on agro-pastoral system initiated in a Purple Red Latosol in Campo Grande, MS, Brazil, from 1) field with continuos soybean cropping; 2) a field with soybean cultivation after 4  years of use as a grassland (rotational soybean); 3) continuous grassland; 4) grassland planted after 4  years of soybean cultivation (rotational grassland), 5) degraded grassland; and 6) original Cerrados forest. Total carbon (C) and nitrogen (N) contents and mineralization potentials were determined. The results indicated that replacement of the Cerrados forest by a pure grassland and exploitation without propor cattle management and fertilizer application led to a descrease in both total C and N contents. Continuous cultivation of soybean on such a degraded grassland area induced area induced a further decrease, which could be alleviated by rotation with a grassland. On the other hand, soil C and N mineralization potentials were not appreciably affected, indicating that grassland degradation did not affect these parameters. C and N mineralization showed a seasonal pattern, being higher in the rainy season (November) than in the dry season (April). Overall, it can be concluded that a grass-soybean rotation (agro-pastoral system) may benefit agricultural exploitation in the Brazilian Cerrados area, as both complement each other in maintaining a suitable soil C balance..	
Palavras-Chave: 	Agropastoral systems; Brasil Central; Brazilian savannas; Central of Brazil; Integracao agricultura-pecuaria; Soils.	
Thesagro: 	Carbono; Cerrado; Fertilizante Nitrogenado; Solo.	
Thesaurus Nal: 	carbon; nitrogen fertilizers.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Gado de Corte (CNPGC)	
Exemplares: 	CNPGC - (10277-1) - UPC - SP - -- - 445/09 -  - 445/09 - DIS