Organics
Posted on | October 25, 2012 | Comments Off on Organics
Second (GUCHERT, ROUSSENQ GRANDSON, 2007, P. 24) ' ' Alone one, to be considered perfect, needs to have in its constitution: 45% of minerals, 25% of air occupying its pores, 26% of water and 5% of organic substance and microrganismos' '. The amount of present organic substance in the ground is determined by the action of activities human beings, the climatic factors and the vegetal covering of an area, therefore the amount of organic substance varies the found region in accordance with being that in bigger abundance in areas of humid and tempered climates. All the components of the ground are in constant interaction, this makes with that the organic substance is shaped of distinct and heterogeneous form. ' ' In the died vegetable layers most recent, constituted of complex composites, the decomposition, called occurs more quickly humificao. The ground acquires a darker color, therefore it forms hmus' ' (GUCHERT, ROUSSENQ GRANDSON, 2007, P.
25). We call hmus the resultant made up of decomposition of the organic substance. Beyond the humificao process the mineralizao also exists that nothing more is of what the transformation of the organic substance in mineral nutrients that will be absorbed by the roots of the plants. In accordance with Luiz Felippe Salemi (2010), the mineralizao process occurs of the following form: The carbon of molecules of carboidratos, lipdios (fats), proteins is set free in the form of carbon dioxide (CO2). In a similar way, the nutrients as nitrogen and the match also contained in this are set free. Thus, for example, the nitrogen that is in the protein form suffers the process from mineralizao being set free in the ammonium form (NH4+).
One says that the nitrogen of the organic substance is suffering mineralizao. In the same way, the match can be set free of the organic substance in the fosfato form. This release is carried through by the action of the microrganismos (fungos and bacteria) of ground during the decomposition process.
