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| Stamford,Newton P; Moura,Patrícia M; Lira Júnior,Mário A; Santos,Carolina Etienne de RS; Duenhas,Luíza Helena; Gava,Carlos Alberto T. |
| Fertilizer application may promote significant changes in soil reaction and on the availability of important nutrients for plants. The utilization of rock biofertilizers is a practical process that reduces energy consumption and increases nutrient availability in soils. In a field experiment, the effect of biofertilizers produced with phosphate and potash rocks plus Acidithiobacillus inoculation were evaluated on the chemical attributes of an Argisoil from the São Francisco Valley, Pernambuco State, Brazil, after melon cultivation. The experiment was arranged in a factorial 3²+2 scheme in randomized block design, with four replicates. Two sources of P biofertilizer (PB) and K biofertilizer (KB) were applied in the same doses recommended for simple... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo; Acidithiobacillus; Apatite; Biotite; Available P and K; Sulfur oxidation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362009000400008 |
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| Vacelet, E. |
| The influence of spillage of phosphates on the bacterial population and its activity was found to be not significant (on total number) or significant but low (on the number of growing cells which was higher close to the loading area). Phosphate discharge resulted also in a significant increase of dividing cells and of enzymatic activity but its effects could be hardly separated from sewage effects. Neither solubilizing strains nor bacterial solubilization could be detected. |
| Tipo: Text |
Palavras-chave: Bacteria; Apatite; Pollution effects; Phosphates; Chemical pollution. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1010.pdf |
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| Maluf,Henrique José Guimarães Moreira; Silva,Carlos Alberto; Morais,Everton Geraldo de; Paula,Leonardo Henrique Duarte de. |
| ABSTRACT: In alkalinized and Ca-rich composts, solubilization of apatite from phosphate rocks (PRs) is not guaranteed; however, chelating agents and humified substances produced during composting may alter the soluble contents and P forms of monoammonium phosphate (MAP)-based composts. These effects may depend on the proportions of organic wastes and P source used in the compost piles. The aim of this study was to evaluate the effect of composting chicken manure, coffee husk, and Araxá PR, Bayóvar PR, or MAP in different proportions on the organic matter decomposition, total N, Ca contents, and soluble P fractions in the composts. The treatments consisted of a 3 × 4 × 2 factorial, through the combination of three P sources [Araxá PR, Bayóvar PR, and MAP],... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apatite; Chicken manure; Coffee husk; Organic acids; NPK fertilizer equivalent. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100507 |
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