Data/hora: 25/06/2024 00:53:28

Biblioteca(s): | Embrapa Gado de Corte.
Data corrente: | 15/06/2004
Data da última atualização: | 15/06/2004
Autoria: | KANNO, T.; MACEDO, M. C. M.; NAKAMURA, T.; YOSHIMURA, Y.; FUKUDA, E.; KANDA, K.; NAKANISHI, N.; SAITO, M.; ANDO, Y.
Afiliação: | JIRCAS (Owashi, Japão).
Título: | Grassland management technology for sustainable agro-pastoral systems in the subtropical zone of Brazil.
Ano de publicação: | 2004
Fonte/Imprenta: | In: SUENAGA, K.; OSHIBE, A.; TANIGUHI, T. (Ed.). Development of sustainable agro-pastoral systems in the subtropical zone of Brazil. Tsukuba: JIRCAS, 2004.
Páginas: | p. 5-13.
Série: | (JIRCAS. Working Report, 36).
Idioma: | Inglês
Notas: | CNPGC. Proceedings of the Workshop on the results and prospects of comprehensive studies on the development of sustainable agro-pastoral systems in the subtropical zone of Brazil, 2003.
Conteúdo: | The purpose of this study is to develop grassland management technology for sustainable agro-pastoral systems in the Cerrado region of Brazil. Several pot experiments were conducted for understanding agronomic attributes of main forage species. Responses of three Brachiaria speceis to water deficit stress were examined in two pot experiments. In the water stress treatment. B. humidicola decreased water requirement and increased waer use  efficiency both in the  two  experiments, consistently. Effects of arbuscular mycorrhizal fungi (AMF) on dry matter  production and P acquisition were also examined for four grass species (B.decumnens [BD] B. brizantha (BB), B humidicola (HU), and maximum (PM) at three in a pot experiment. Inoculation of AMF and soil pH affected significantly on dry matter production and P acquisition  of the grass species. Effect of soil pH on the mycorrhzal responsiveness in P acquisition was different among the grass species: at soil pH4.3, PM showed the highest responsiveness, while at 5.l and 6,4k, BB showed the higlhest values. In the grazing  experiment at the National Beef Cattle Research Center (Embrapa Gado de Corte) N balance was examined in the two  cropping  sequences: PM pastures established  after 4-year cultivation of soybeans (CS4-P4) and 4-year rotation of soybean with winter millet (CSW4-P4) PM pasture in CSW4-P4 produced less dry matter thain in CS4-P4, becouse larger amount of soil N was talen from the ecosystem as carcass and via ammonia volatilization from urine or dung during the winter millet grazing in the earlier 4-year rotation. Moreover, forage productivity was monitored during three years on the PM pastures (CS4-P4), BB pastures sown with corns  simultaneously (CSWl-P4 was higher than the other pastures, whereas the amount of litter decomposed was  also highest among the  examined pastrues, because grazing pressure was insufficient  comparing  their  productivity. On the other  hand, forage productivity of  BB pastures (CSW1-C1+P3)was less than the other pastures, presemably because the growth of BB was restricted by the competition with ther corns at the seeding establishment. Thus, it was concluded that  maintaining soil N fertility and adequate grazing were keys for the sustainability of the agro-pastoral systems.
Palavras-Chave: | Agropastoral systems; Brasil; Brazilian savannas; Integração agricultura pecuária; Management; Sustainability; Sustentabilidade.
Thesagro: | Cerrado; Manejo; Pastagem.
Thesaurus Nal: | Brazil; pastures.
Categoria do assunto: | --
Registro original: | Embrapa Gado de Corte (CNPGC)
Exemplares: | CNPGC - (10494-1) - UPC - PL - -- - 630 - S944d -  - DIS