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Contrasting tree effects on soil P sorption and availability on a Xanthic Ferralsol. Repositório Alice
CAMPOS, C. E. B.; LEHMANN, J..
The central objective of these work is the investigation of the availability of soil P as affected by two tree species (cupuacu, urucu, pueraria) with widely different P return, in tne Manaus-AM (Brasil). Phosphorus adsorption did not increase with an exposure longer than 8 h. Therefore, adsorption isotherms can be done within 8 h in the studied soils. In general, about 50% of the added P were adsorbed by the soil matrix. The adsorption decreased for soils which received higher amounts of P fertilizer, indicating that adsorption sities were already blocked by previous fertilization. soils under cupuacu adsorbed more of the added P than soil under ururcu (annatto). This can be explained by the high amounts of organic P which is present in soils under urucu...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Floresta tropical umida; Conservacao do solo; Agrofloresta; Cultivo multiple; Bactris gasipaes; Pupunha; Theobroma grandiflorum; Cupuacu; Pueraria phaseoloides; Raiz; Adubacao; Fertilizante fosfatado; Absorcao; Tropical rain forests; Soil conservation; Agroforestry; Multiple cropping; Root; Fertilizers application; Potash fertilizers; Adsorption.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/handle/doc/670034
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Vismia guianensis (Aubl.) Choisy, Clusiaceae: management factors in early stages of agroforestry systems. Repositório Alice
BOEHM, V.; SCHMIDT, P.; SKATULLA, M.; GASPAROTTO, L.; LIEBEREI, R..
The objective this study was to investigate V. guianensis growth, nutrient content, root morphology and interactions with other plant species. The results demonstrate a potential use of this plant as integrative component in sustainable agroforestry systems, in Manaus-AM (Brasil).
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Floresta tropical umida; Conservacao do solo; Agrofloresta; Cultivo multiple; Vismia guianensis; Crescimento; Nutricao; Raiz; Brasil; Amazonas; Manaus; Tropical rain forests; Soil conservation; Agroforestry; Multiple cropping; Growth; Plant nutrition; Root.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/handle/doc/670051
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