کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8873212 | 1623002 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phosphorus transformations in alfisols and ultisols under different land uses in the atlantic forest region of Brazil
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Phosphorus transformations in alfisols and ultisols under different land uses in the atlantic forest region of Brazil Phosphorus transformations in alfisols and ultisols under different land uses in the atlantic forest region of Brazil](/preview/png/8873212.png)
چکیده انگلیسی
This study examined the impact of land use changes on phosphorus (P) transformations in soils of different pedogenesis with little or no addition of P in the humid tropical region. The sequential extraction method was used to determine P fractions, and structural equations modeling was employed to investigate the P cycle in soils under plantations of rubber tree (Hevea brasiliensis), rubber treeâ¯+â¯cocoa (Theobroma cacao), rubber treeâ¯+â¯acai palm (Euterpe oleracea), rubber treeâ¯+â¯cupuassu (Theobroma grandiflorum) and cocoaâ¯+â¯erythrina (Erythrina glauca) as well as pastures (Brachiaria decumbens) and natural forests. The distribution of P fractions in soil appears to be affected by land use in all soil orders. Agroforestry systems of rubber treeâ¯+â¯acai palm and rubber treeâ¯+â¯cocoa showed high capacity to increase the concentrations of all the P fractions in soil compared to natural forest in soils of advanced stage of weathering. Pastures and rubber plantations provided higher concentrations of inorganic P fractions. The P fractionation method revealed the potential of labile fractions (resin-Piâ¯+â¯NaHCO3-Piâ¯+â¯Po) to supply appropriately the demand of all vegetation types evaluated in all soil orders. The structural model enabled to identify functional pools of P in soil, and to identify transformation processes of P in soil, in which organic P pool was the main P source for the available P pool and which part of the occluded P pool (recalcitrant) can be available for the plants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma Regional - Volume 14, September 2018, e00184
Journal: Geoderma Regional - Volume 14, September 2018, e00184
نویسندگان
Tarciana de Oliveira Viana, Antonio Carlos Gama-Rodrigues, Emanuela Forestieri Gama-Rodrigues, Seldon Aleixo, Renato Valadares de Souza Moreira, Marcus VinÃcius da Silva Sales, José Raimundo Bonadie Marques,