Phosphorous forms in cultivated indian black earth (anthrosols) of varying texture in the brazilian Amazon

Revista Brasileira de Ciência do Solo

Kleberson Worslley De Souza²  Hedinaldo Narciso Lima¹  Carlos Ernesto G.r. Schaefer¹  Wenceslau Geraldes Teixeira¹  Karina Pulrolnik¹  Guilherme Resende Corrêa¹ 

[1] ,Universidade Federal de Viçosa Departamento de Solo Viçosa MG

关键词: Amazon Black Earth;    soil P fractionation;    upland soils;    Manacapuru;    Amazon soils;    anthropogenic soils;    Terra Preta da Amazônia;    fracionamento de P;    solos de terra firme;    Manacapuru;    Solos da Amazônia;    solos antropogênicos;   

DOI  :  10.1590/S0100-06832009000500027

来源: SciELO

【 摘 要 】

Despite the agricultural importance of Indian 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-Colombian 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 were 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 NH4Cl were highest, although different from Mehlich 1-extractable amounts.

【 授权许可】

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