ORGANIC VS CONVENTIONAL HERD EFFECTS ON THE WEIGHTS AND DAILY GAINS IN MURCIANO-GRANADINA KIDS

Abstract

The present work is testing the meat production ability of the Murciano-Granadina dairy kids maintained under organic and conventional management conditions. The weights of 89 kids of both sexes were recorded weekly from birth to slaughtering at the age reaching 7 Kg., according local commercial customs. 573 weights records were obtained in the three herds involved in the experience. These data were submitted to a statistical descriptive analysis enclosing central and dispersive descriptive statistics. We can stand out mean values around 5.5 Kg. for conventional farms, while the organic representative showed a mean slightly lower value, near 5 kg, the standard deviation was stable for all the herds around 1.8 and 2 kg, what demonstrates a high variability. The ANOVA developed under the GLM model demonstrates significant effect of the herd, sex and its interaction. The Duncan Pos Hoc test of means homogeneity showed the effect of the organic herd as responsible of the significant differences. Also a sexual dimorphism was detected in this analysis. The main conclusion of this work is the necessity of a differential commercialization of the organic kids to get an over value supported in their quality; in the present conditions the subproduction of organic kids in dairy organic farms is not competitive.