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| Martins,Vanessa; Silva,Douglas Ramos Guelfi; Marchi,Giuliano; Leite,Maurício Cunha Almeida; Martins,Éder de Souza; Gonçalves,Ana Stella Freire; Guilherme,Luiz Roberto Guimarães. |
| The current high price of potassium chloride and the dependence of Brazil on imported materials to supply the domestic demand call for studies evaluating the efficiency of alternative sources of nutrients. The aim of this work was to evaluate the effect of silicate rock powder and a manganese mining by-product, and secondary materials originated from these two materials, on soil chemical properties and on brachiaria production. This greenhouse experiment was conducted in pots with 5 kg of soil (Latossolo Vermelho-Amarelo distrófico - Oxisol). The alternative nutrient sources were: verdete, verdete treated with NH4OH, phonolite, ultramafic rock, mining waste and the proportion of 75 % of these K fertilizers and 25 % lime. Mixtures containing 25 % of lime... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil acidity; Nutrient availability; Rock powder; Multi-nutrient fertilizer. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100194 |
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| Silva,Douglas Ramos Guelfi; Marchi,Giuliano; Spehar,Carlos Roberto; Guilherme,Luiz Roberto Guimarães; Rein,Thomaz Adolpho; Soares,Danilo Araújo; Ávila,Fabrício William. |
| The expansion of Brazilian agriculture has led to a heavy dependence on imported fertilizers to ensure the supply of the growing food demand. This fact has contributed to a growing interest in alternative nutrient sources, such as ground silicate rocks. It is necessary, however, to know the potential of nutrient release and changes these materials can cause in soils. The purpose of this study was to characterize six silicate rocks and evaluate their effects on the chemical properties of treated soil, assessed by chemical extractants after greenhouse incubation. The experimental design consisted of completely randomized plots, in a 3 x 6 factorial scheme, with four replications. The factors were potassium levels (0-control: without silicate rock... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multi-nutrient fertilizer; Nutrient available; Potassic rock; Rock powder; Soil amendment. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000300025 |
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