Evaluation the quality the different organic substrates in condition of the organoponic
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Abstract
The aim of this research was to evaluate physical, chemical, and biological indicators in three organoponics before and after two successive crops. A complete randomized block designs with three replicates. The response variables were pH, electric conductivity, total nitrogen, organic matter, relationship carbon/nitrogen, microbial breathing, natural and hygroscopic moisture, bulk and real densities, total porosity. The half arithmetic and standard error of were determinates. They were bivariate correlations and diagrams of the degradation indicators. To the beginning the substrates showed porosities and densities bulk (bigger to 68.8 % to 0.81 mg.m-3, respectively). Those that were relate significantly to each other and with the humidity. The management of the substrates in the organoponic was determinate in more or smaller degree the heterogeneity of these. The chemical characterization demonstrated the drop homogeneity of the same ones during the preparation of the containers, what rebounded in its physical properties. By means of the polynomial curves of third order, for each organoponic, it was possible to define the range porosity to which the indicators behaved better for benefit of the substrate. The microbial breathing became more effective to 60 mg CO2 when the volume of pores was the 70 - 74 % and the content of carbon oscillated among 4 to 8 %. It was evidence in all the cases the highly significant relationship that exists between the porous state and the indicators of degradation of the organic matter.
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