Cultivation affected the level of inorganic phosphorus more than the organic pool of the Pampas soils in Argentina
| Autor: | Roberto Alvarez, Maria Marta Caffaro, Cecilia D. Molina, Daniela Gangi, Gonzalo Berhongaray |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
SOIL PHOSPHORUS Soil Science chemistry.chemical_element PAMPEAN REGION 01 natural sciences Pasture Crop Inorganic phosphorus LAND USE geography geography.geographical_feature_category Phosphorus Agricultura 04 agricultural and veterinary sciences chemistry Agronomy CIENCIAS AGRÍCOLAS Soil water 040103 agronomy & agriculture Soil phosphorus 0401 agriculture forestry and fisheries Environmental science Agricultura Silvicultura y Pesca Agronomy and Crop Science 010606 plant biology & botany |
| Popis: | The effects of land use on soil organic and inorganic phosphorus (P) stockswere assessed in the Pampas. Three hundred and eighty-six paired siteswidely distributed over an area of ca. 50 Mha were sampled. Land usetypesincluded soils under trees, uncropped soils, cropped soils at the pasturephase of a mixed rotation, cropped soils at the crop phase of a mixed rotation,and flooded soils. Slight differences in organic P stocks were found amongland uses. Organic P was 21?35% lower in flooded soil than in the othertreatments in the 0?100 cm depth. Inorganic P was significantly lower (ca.27%) in pasture and cropped soilsthan in the uncropped controls at 0?25 cmdepth. The ratios of organic P/inorganic P and organic C/organic P decreasedwith depth and did not significantly differ among the sites. The influence ofcultivation on inorganic P to a depth of 100 cm depended on the initialphosphorus content of the soil. Soils rich in phosphorus lost substantialamounts of their phosphorus stocks, in some cases losses were as high as70%, whereas phosphorus-poor soils presented only small changes in theirinorganic P levels. Fil: Alvarez, Roberto. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Gangi, Daniela. Universidad de Buenos Aires; Argentina Fil: Caffaro, Maria Marta. Universidad de Buenos Aires; Argentina Fil: Molina, Cecilia. Universidad de Buenos Aires; Argentina Fil: Berhongaray, Gonzalo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina |
| Databáze: | OpenAIRE |
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