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| Mancuso,Mauricio Antonio Cuzato; Soratto,Rogério Peres; Crusciol,Carlos Alexandre Costa; Castro,Gustavo Spadotti Amaral. |
| The use of potassium (K) rock powder can be an alternative for K supply of crops. Thus, to reduce K fertilizer imports from abroad, possibilities of extracting this nutrient from Brazilian rocks are being studied. The objective was to evaluate the effect of phonolite rock powder (F2) as K source (Ekosil®) on the air-dried fruit yield, nutrition and macronutrient export of Arabica coffee. The experiment was carried out on a dystroferric Red Latosol (Typic Haplorthox), in Piraju, São Paulo State, Brazil, in the 2008/09 and 2009/10 growing seasons. The experimental design was a randomized complete block, in a factorial 2 × 3 + 1 arrangement, with four replications. The treatments consisted of two K sources (KCl - 58 % of K2O and F2 - 8.42 % K2O) and three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica; Potassium fertilization; Rock powder; Agronomic efficiency. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500010 |
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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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| Silva,Valéria N. da; Silva,Luiz E. de S. F. da; Silva,Apolino J. N. da; Macedo,Gorete R. de. |
| ABSTRACT The study was conducted in a greenhouse at the Agricultural Research Corporation of Rio Grande do Norte (EMPARN), in order to evaluate the effect of biofertilizers and potassium phosphate rocks, triple superphosphate (TSP) and potassium chloride (KCl), crushed rocks on the chemical properties of the soil and performance of the bacteria Paenibacillus polymyxa in the absorption of macronutrients by the cowpea bean crop. An Ultisol (10 kg per pot) was used with the addition of biofertilizers at levels 40, 70, 100 and 200% of recommendation for TSP and KCl, inoculated or not with bacteria. There was an effect of fertilization on the absorption of macronutrients, being the best results for P and K with TSP + KCL, and N, Ca and Mg for the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: PRPG; Rock powder; Phosphorus; Potassium. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001201136 |
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| Silva, Alinne da; Centro de Energia Nuclear na Agricultura/USP; Pereira, Tamara; Universidade do Oeste da Santa Catarina - Campus de Videira, UNOESC; Coelho, Cileide Maria Medeiros; Universidade do Estado de Santa Catarina, UDESC; Almeida, Jaime Antonio de; Universidade do Estado de Santa Catarina, UDESC; Schmitt, Catiline; Universidade do Estado de Santa Catarina, UDESC. |
| O teor de fitato nos grãos está correlacionado com o suprimento de fósforo à planta, porém não se sabe quanto este teor responde à disponibilidade mais lenta do nutriente no solo. O objetivo deste trabalho foi avaliar o efeito do pó de rocha, isolado ou combinado com esterco bovino, sobre: produtividade, teores de proteína, fósforo e fitato nos grãos de feijão. O experimento foi conduzido sob delineamento inteiramente casualizado, com quatro repetições. Em todas as parcelas, exceção ao tratamento com adubação convencional, foram adicionados pó de granito e fosfato natural. Os tratamentos foram constituídos de testemunha, adubação convencional, pó de basalto (2,5; 5,0; 10,0 e 20,0 t ha-1), esterco bovino e as mesmas doses de pó de basalto associadas com... |
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Palavras-chave: 5.01.00.00-9 Antinutriente; Pó de rocha; Fósforo Agronomia Antinutrient; Rock powder; Phosphorus. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5878 |
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