Biodisponibilização de nutrientes em processos de vermicompostagem com adição de fontes de fósforo
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2013-03-27
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Universidade Federal de Goiás
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Produce biofertilizers enriched with natural phosphates may increase the solubility of phosphorus minimizing the dependence of acidulated phosphate fertilizers. The objective of this research was to evaluate the bioavailability of nutrients due to the processes of composting and vermicomposting. The experimental design was completely randomized in a factorial 4 x 3 with 5 repetitions , the factors being the sources of P ( 1 - ammoniated superphosphate , 2 - rock phosphate Itafós 3 - Araxá rock phosphate and 4 - thermophosphate Yoorin ) and the method of incorporating phosphorus sources with the organic fraction : 1 - worm compost with addition of P sources at the beginning of the process of vermicomposting ( VPI ) 2 - worm compost with addition of P sources at the end of vermicomposting process ( VPF ) and 3 - Compound earthworms with no addition of P sources at the beginning of the composting process ( CP ) . Were evaluated: weight of earthworms , microbial biomass dry weight, total carbon , N, C / N ratio , pH, Q water , citric acid, total S, K, Ca , Mg . In addition to percentage of N, P, water, citric acid, total S and Ca is left in place in relation to the start of the research. The results indicate that the source acidulated super simple at a dose of 6 kg -1 is not indicated for the processes of composting and vermicomposting. In vermicomposting, the rock phosphate Itafós secured higher values of C-BM. The compost was effective in providing nutrients. Addition of phosphorus sources after the vermicomposting process increased the solubility of phosphorus in citric acid and water for phosphates and Araxá Itafós .
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GUIMARÃES, Ricardo Neves. Biodisponibilização de nutrientes em processos de vermicompostagem com adição de fontes de fósforo. 2013. 64 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 2013.