Title:	Contrasting tree effects on soil P sorption and availability on a Xanthic Ferralsol.
Authors:	CAMPOS, C. E. B. LEHMANN, J.
Affiliation:	Bolsista CNPq; University of Bayreuth.
Date Issued:	2000
Citation:	In: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS, 2000, Hamburg. Programa and abstracts... Hamburg: University, 2000.
Pages:	p. 174.
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 Adubação Bactris Gasipaes Cupuaçu Conservação do Solo Floresta Tropical Úmida Fertilizante Fosfatado Raiz Pupunha Pueraria Phaseoloides Theobroma Grandiflorum
NAL Thesaurus:	agroforestry adsorption multiple cropping soil conservation tropical rain forests
Keywords:	Agrofloresta Cultivo multiple Root Fertilizers application Potash fertilizers
Type of Material:	Resumo em anais e proceedings
Access:	openAccess
Appears in Collections:	Resumo em anais de congresso (CPAA)