Utilization and fate of phosphorus of different sources applied to cohesive soil of Amazonian periphery
| Autor: | Marta Jordana Arruda Coelho, Emanoel Gomes de Moura, Alana das Chagas Ferreira Aguiar, Virley Gardeny Lima Sena |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Crop residue
Randomized block design hardsetting soil chemistry.chemical_element 010501 environmental sciences 01 natural sciences nitrogen Soil management Leucaena lcsh:Agriculture (General) P fractions 0105 earth and related environmental sciences aluminous phosphate biology Phosphorus fungi food and beverages Soil classification 04 agricultural and veterinary sciences biology.organism_classification lcsh:S1-972 chemistry Agronomy 040103 agronomy & agriculture leguminous residues 0401 agriculture forestry and fisheries Animal Science and Zoology Agronomy and Crop Science Mulch Plant nutrition |
| Zdroj: | Scientia Agricola, Volume: 74, Issue: 3, Pages: 242-249, Published: JUN 2017 Scientia Agricola v.74 n.3 2017 Scientia Agrícola Universidade de São Paulo (USP) instacron:USP Scientia Agricola, Vol 74, Iss 3, Pp 242-249 |
| Popis: | In the Amazonian region, P is often a primary factor limiting sustainable agrosystems. We compared the efficiencies of local aluminous phosphate (ALP) and single superphosphate (SSP) under a cover of leguminous residues to determine the fate of P sources in an Amazonian soil with hardsetting characteristics. The experiment followed a randomized block design with four replications and the following treatments: ALPU, i.e. ALP plus urea (U); ALPL, i.e., ALP plus leucaena (L); SSPU, i.e., SSP plus urea; SSPL, i.e., SSP plus leucaena; and BS, i.e., bare soil (without residues). To assess the residual values of the P sources, we used a sequence of crops consisting of maize, cowpea and cassava. Both ALP and SSP exhibited low P efficiency in BS. The greatest amounts of P and N uptake in the plots where P sources and leucaena residues were added, as in those covered with leucaena residue, resulted in higher productivity levels. These differences are important for the adoption of beneficial soil management practices and the use of P sources to enhance efficiency in tropical soils. The use of residues increased the P use efficiency of both P sources, as it enhanced the uptake of both N and soluble P. The replacement of SSP with ALP may be advantageous in the second year of planting with high-demand crops, but the P of the SSP retained in the minus soluble fractions may be available if the SSP is used in P-depleting crops combined with no-tillage underneath a mulch of residues. |
| Databáze: | OpenAIRE |
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