Title:	Phosphorous forms in cultivated indian black earth (anthrosols) of varying texture in the brazilian Amazon.
Authors:	SOUZA, K. W. de LIMA, H. N. SCHAEFER, C. E. G. R. TEIXEIRA, W. G. PULROLNIK, K. CORRÊA, G. R.
Affiliation:	KLEBERSON WORSLLEY DE SOUZA, UNIVERSIDADE FEDERAL DE VIÇOSA HEDINALDO NARCISO LIMA, UNIVERSIDADE FEDERAL DO AMAZONAS CARLOS ERNESTO G. R. SCHAEFER, UNIVERSIDADE FEDERAL DE VIÇOSA WENCESLAU GERALDES TEIXEIRA, CPAA KARINA PULROLNIK, CPAC GUILHERME RESENDE CORREA, UNIVERSIDADE FEDERAL DE VIÇOSA.
Date Issued:	2009
Citation:	Revista Brasileira de Ciência do Solo, v. 33, n. 5, p. 1347-1355, Oct. 2009.
Description:	Despite the agricultural importance of India Black Earth (IBE) in the Amazon region, there are few studies that report on the relation between soil texture and chemical fertility of IBE. These soils of pre-Colobian origin, with high contents of P, Ca and other nutrients are found across the Amazon valley. IBE profiles were studied to evaluate the total contents of P, its primary chemical forms and the P transformation phases in areas with IBE soils of variable texture and in adjacent reference soils. The soil texture strongly influenced soil fertility, changing in terms of transformation of the primary P forms and, consequently, predominant P forms in IBE. Soils with texture varying between clay and heavy clay had higher total P contents and primary Ca-P forms. Highest P-Al and lowest total P amounts werw observed at the site Rio Preto da Eva, where texture varies from sandy, loam to sandy clay loam. In the IBE with clay texture the amounts of soluble P, extracted with NH4CI were highest, although different from Mehlich 1-extractable amounts.
NAL Thesaurus:	Anthrosols Soil Soil chemistry Terra preta Upland soils Anthropogenic soil types
Keywords:	Amazon black earth Soil P fractionation Amazon soils Anthropogenic soils
DOI:	https://doi.org/10.1590/S0100-06832009000500027
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPAC)