Phosphorus and silicon fertilizaer rates effects on dynamics of soil phosphorus fractions in oxisol under common bean cultivation
| Autor: | ALOVISI, A. M. T., FURTINI NETO, A. E., SERRA, A. P., ALOVISI, A. A., TOKURA, L. K., LOURENTE, E. R. P., SILVA, R. S. da, SILVA, C. F. B. da, FERNANDES, J. S. |
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| Přispěvatelé: | ALESSANDRA MAYUMI TOKURA ALOVISI, UFGD, ANTONIO EDUARDO FURTINI NETO, UFLA, ADEMAR PEREIRA SERRA, CNPGC, ALVES ALEXANDRE ALOVISI, UFGD, LUCIENE KAZUE TOKURA, Universidade Estadual do Oeste do Paraná, ELAINE REIS PINHEIRO LORUENTE, UFGD, ROBERVALDO SOARES DA SILVA, UFGD, CAMILA FARAH BORGES DA SILVA, UFGD, JUCINEI SOUZA FERNANDES, UFGD. |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| Popis: | The purpose of this research was to evaluate the effects of P and Si fertilizer rates in dynamic of P fractions in clay soil under greenhouse. The research was carried out in a Dystroferric Red Latosol of a very loamy texture from Lavras city, Minas Gerais State, Brazil. The experimental design was entirely randomized, arranged in 4 × 3 factorial design, with four repetitions. The treatments included four inorganic fertilizer P rates (0, 110, 330 and 560 mg dm-3) and three Si rates (0, 110, 330 and 560 mg dm-3). The preview application of Si fertilizer did not contribute to decrease P desorption. Possibly, the silicate has lower affinity with the bound sites of adsorption than phosphates. The effects of inorganic fertilizer P were higher in increasing the moderately labile and labile P inorganic fractions. Among the organic P fractions, the NaHCO3-Po fraction was the only one that contributes to plant nutrition. The Hedley sequential phosphorus fractionation promoted information about different pools where P was accumulated in the soil after common bean cultivation. The highest amount of P was obtained in stable P fraction, followed by moderately labile and labile P fraction. The moderately labile P fraction decreased after common bean cultivation possibly due to the time of P contact in the soil and redistribution to stable P fraction. The labile form was the lowest P pool in soil; nevertheless the increase in fertilizer P rates increases the amount of P content in labile fraction. |
| Databáze: | OpenAIRE |
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