Resumo

HOYOS, JOSÉ LUIS; VARGAS, CARLOS ALBERTO  e  VELASCO, REINALDO J. EVALUATION OF COMPOST OBTAINED IN MOBILE PILE EMPLOYING MIXTURES OF POULTRY MANURE WITH CELLULOSIC MATERIAL. Rev.Bio.Agro [online]. 2010, vol.8, n.1, pp.54-60. ISSN 1692-3561.

In this study it was evaluated the process of composting from poultry manure, and the effect of the mixture with different proportions of cellulose material on the chemical and physical composition of compost. A process of fermentation in mobile pile was evaluated with capacity of 621 m³/pile. Some samples were daily taken in order to measure temperature, humidity and pH, at the end of the process physical and chemical analysis were made in order to determine the quality of the product, which was analyzed according to the NTC 5167 about organic fertilizers in Colombia. A design was made complete/y at random (DCA) with a witness group identified as "Blanco" and three treatments with two replicas for each one, a mixture of poultry manure and sawdust plus wood shavings with a relation C/N of 21:1 (T1 current condition "Blanco"), 25:1 (12), 27.5:1 (T3) and 30:1 (T4) respectively. The process of composting was produced during 45 days for every treatment. As for humidity, no treatment reached the value established by the NTC 5167 (<20%). In the same way in the scale of pH a rising is showed which reports values over 8.5 in every treatment, which confirms the instability of the compost at the end of the process. The values in the relationship carbon/nitrogen were adapted, in the four treatments, to this kind of organic fertilizer, these four treatments also presented acceptable values according to the NTC 5167, a capacity of water retention, apparent density ashes and organic matter. The capacity of cationic exchange presented significant differences (p< 0.05) to the treatment T4, which according to the NTC 5167 should be minimum of 30 mEq/10Ogr, alternative that did not achieve this valur because of the excess of cellulose material present in the womb of the process which leads to a decrease of the biological activity due to the lack ofnutrients in its environment.

Palavras-chave : Organlc fertilizer; relation C/N; humldity; composting; poultry manure; NTC 5167.

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