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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
12/12/2006 |
Data da última atualização: |
12/12/2006 |
Autoria: |
GONZAGA, A. R.; ARAÚJO FILHO, T. D. de; FRAGA, A. B.; CARVALHO, E. M. de; PARENTE, H. N.; LEITE, M. L. de M. V.; BRAGA, A. A.; SANTOS, L. L. dos; MOREIRA FILHO, E. C.; TINOCO, A. F. da F. |
Título: |
Diagnóstico da produção da ovinocaprinocultura na região do alto sertão do estado de Alagoas.: produtor. |
Ano de publicação: |
2006 |
Fonte/Imprenta: |
In: CONGRESSO NORDESTINO DE PRODUÇÃO ANIMAL, 4.; SIMPÓSIO NORDESTINO DE ALIMENTAÇÃO DE RUMINANTES, 10.; SIMPÓSIO DE PRODUÇÃO ANIMAL DO VALE DO SÃO FRANCISCO, 1., 2006, Petrolina. Anais... Petrolina: Sociedade Nordestina de Produção Animal; Embrapa Semi-Arido, 2006. 3 f. 1 CD-ROM. |
Idioma: |
Português |
Palavras-Chave: |
Alagoas; Brasil. |
Thesagro: |
Caprinocultura; Manejo; Ovinocultura; Pesquisa de Mercado; Produtor; Sistema de Produção. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01146naa a2200313 a 4500 001 1532553 005 2006-12-12 008 2006 bl uuuu u00u1 u #d 100 1 $aGONZAGA, A. R. 245 $aDiagnóstico da produção da ovinocaprinocultura na região do alto sertão do estado de Alagoas.$bprodutor. 260 $c2006 650 $aCaprinocultura 650 $aManejo 650 $aOvinocultura 650 $aPesquisa de Mercado 650 $aProdutor 650 $aSistema de Produção 653 $aAlagoas 653 $aBrasil 700 1 $aARAÚJO FILHO, T. D. de 700 1 $aFRAGA, A. B. 700 1 $aCARVALHO, E. M. de 700 1 $aPARENTE, H. N. 700 1 $aLEITE, M. L. de M. V. 700 1 $aBRAGA, A. A. 700 1 $aSANTOS, L. L. dos 700 1 $aMOREIRA FILHO, E. C. 700 1 $aTINOCO, A. F. da F. 773 $tIn: CONGRESSO NORDESTINO DE PRODUÇÃO ANIMAL, 4.; SIMPÓSIO NORDESTINO DE ALIMENTAÇÃO DE RUMINANTES, 10.; SIMPÓSIO DE PRODUÇÃO ANIMAL DO VALE DO SÃO FRANCISCO, 1., 2006, Petrolina. Anais... Petrolina: Sociedade Nordestina de Produção Animal; Embrapa Semi-Arido, 2006. 3 f. 1 CD-ROM.
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Embrapa Caprinos e Ovinos (CNPC) |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Soja. |
Data corrente: |
07/11/2011 |
Data da última atualização: |
03/04/2013 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
MOREIRA, A.; FAGERIA, N. K.; GARCIA Y GARCIA, A. |
Afiliação: |
ADONIS MOREIRA, CNPSO; NAND KUMAR FAGERIA, CNPAF; A. GARCIA Y GARCIA, University of Wyoming. |
Título: |
Soil fertility, mineral nitrogen, and microbial biomass in Upland soils of the Central Amazon under different plant covers. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Communications in Soil Science and Plant Analysis, Philadelphia, v. 42, n. 6, p. 694-705, 2011. |
DOI: |
10.1080/00103624.2011.550376 |
Idioma: |
Inglês |
Conteúdo: |
Amazon is the largest state in Brazil and majority of the state is covered by the largest tropical rainforest of the world. Most soils of the Amazon region soils are acidic and infertile. When the Amazon forest land is cleared for agricultural use by burning the vegetation, the efficient nutrient recycling mechanisms are disrupted. However, nutrient contents in the deforested burn land increased temporarily. The objective of this study was to evaluate the soil fertility, mineral nitrogen (N), and microbial activity of carbon (C), N, and phosphorus (P) resulting from the replacement of the primary forest with pasture (Brachiaria brizantha) and commercial plantations of rubber (Hevea spp.), cupuaçu (Theobroma grandiflorum), and citrus trees (Citrus sinensis) cultivated in Xanthic Ferralsol and secondary forest under Acrisols Dystric Nitosols. The results showed that ammonium-N predominates in the 0- to 10-cm soil depth in both primary forest and areas with secondary forest, citrus plantation, and pasture. There was no increase in soil fertility with management of the cultivated areas under the secondary forest, but in the pasture there was a significant increase in the stock of organic C and total N and high C/N ratios, the inverse of what occurred with the C of the microbial biomass. The primary forest had the greatest values of C and P of the microbial biomass and the lowest metabolic quotient. Of the successions studied, the rubber trees were the plant cover with the smallest changes in terms of quality of the organic matter in the soil. MenosAmazon is the largest state in Brazil and majority of the state is covered by the largest tropical rainforest of the world. Most soils of the Amazon region soils are acidic and infertile. When the Amazon forest land is cleared for agricultural use by burning the vegetation, the efficient nutrient recycling mechanisms are disrupted. However, nutrient contents in the deforested burn land increased temporarily. The objective of this study was to evaluate the soil fertility, mineral nitrogen (N), and microbial activity of carbon (C), N, and phosphorus (P) resulting from the replacement of the primary forest with pasture (Brachiaria brizantha) and commercial plantations of rubber (Hevea spp.), cupuaçu (Theobroma grandiflorum), and citrus trees (Citrus sinensis) cultivated in Xanthic Ferralsol and secondary forest under Acrisols Dystric Nitosols. The results showed that ammonium-N predominates in the 0- to 10-cm soil depth in both primary forest and areas with secondary forest, citrus plantation, and pasture. There was no increase in soil fertility with management of the cultivated areas under the secondary forest, but in the pasture there was a significant increase in the stock of organic C and total N and high C/N ratios, the inverse of what occurred with the C of the microbial biomass. The primary forest had the greatest values of C and P of the microbial biomass and the lowest metabolic quotient. Of the successions studied, the rubber trees were the plant cover with the smalle... Mostrar Tudo |
Palavras-Chave: |
Amazon forest. |
Thesagro: |
Fertilidade do solo; Nitrogênio; Pastagem; Plantio. |
Thesaurus NAL: |
Biogeochemical cycles; Nitrogen; Pastures; Soil fertility. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02384naa a2200265 a 4500 001 1905038 005 2013-04-03 008 2011 bl uuuu u00u1 u #d 024 7 $a10.1080/00103624.2011.550376$2DOI 100 1 $aMOREIRA, A. 245 $aSoil fertility, mineral nitrogen, and microbial biomass in Upland soils of the Central Amazon under different plant covers. 260 $c2011 520 $aAmazon is the largest state in Brazil and majority of the state is covered by the largest tropical rainforest of the world. Most soils of the Amazon region soils are acidic and infertile. When the Amazon forest land is cleared for agricultural use by burning the vegetation, the efficient nutrient recycling mechanisms are disrupted. However, nutrient contents in the deforested burn land increased temporarily. The objective of this study was to evaluate the soil fertility, mineral nitrogen (N), and microbial activity of carbon (C), N, and phosphorus (P) resulting from the replacement of the primary forest with pasture (Brachiaria brizantha) and commercial plantations of rubber (Hevea spp.), cupuaçu (Theobroma grandiflorum), and citrus trees (Citrus sinensis) cultivated in Xanthic Ferralsol and secondary forest under Acrisols Dystric Nitosols. The results showed that ammonium-N predominates in the 0- to 10-cm soil depth in both primary forest and areas with secondary forest, citrus plantation, and pasture. There was no increase in soil fertility with management of the cultivated areas under the secondary forest, but in the pasture there was a significant increase in the stock of organic C and total N and high C/N ratios, the inverse of what occurred with the C of the microbial biomass. The primary forest had the greatest values of C and P of the microbial biomass and the lowest metabolic quotient. Of the successions studied, the rubber trees were the plant cover with the smallest changes in terms of quality of the organic matter in the soil. 650 $aBiogeochemical cycles 650 $aNitrogen 650 $aPastures 650 $aSoil fertility 650 $aFertilidade do solo 650 $aNitrogênio 650 $aPastagem 650 $aPlantio 653 $aAmazon forest 700 1 $aFAGERIA, N. K. 700 1 $aGARCIA Y GARCIA, A. 773 $tCommunications in Soil Science and Plant Analysis, Philadelphia$gv. 42, n. 6, p. 694-705, 2011.
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