Data/hora: 11/06/2024 20:02:16

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