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Research center of Embrapa/Collection: Embrapa Amazônia Ocidental - Resumo em anais de congresso (ALICE)
Date Issued: 2000
Type of Material: Resumo em anais de congresso (ALICE)
Authors: CAMPOS, C. E. B.
Additional Information: Bolsista CNPq; University of Bayreuth.
Title: Contrasting tree effects on soil P sorption and availability on a Xanthic Ferralsol.
Publisher: In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS, 2000, Hamburg. Programa and abstracts... Hamburg: University, 2000.
Pages: p. 174.
Language: en
Keywords: Agrofloresta
Cultivo multiple
Fertilizers application
Potash fertilizers.
Description: 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 as an effect of high P recycling through litterfall.
Thesagro: Absorção
Bactris Gasipaes
Conservação do Solo
Floresta Tropical Úmida
Fertilizante Fosfatado
Pueraria Phaseoloides
Theobroma Grandiflorum.
NAL Thesaurus: agroforestry
multiple cropping
soil conservation
tropical rain forests.
Data Created: 2000-12-04
Appears in Collections:Resumo em anais de congresso (CPAA)

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