Eficiência produtiva e reprodutiva de caprinos leiteiros no Semiárido Paraibano.

Abstract

Efficiency compared two dairy goats genotypes on Paraiba Semiarid. The objective of this study was to evaluate milk production and reproductive rates depending on the time of calving, genotype and birth order in a model production system for dairy goat of the semiarid region. The experiment was conducted in Pending Experimental Station, belonging to EMEPA-PB, in the municipality of Soledade-PB. Production data were analyzed from 56 goats Anglo Nubian and crossbred Alpine in three lactation stations. In station 1 23 goats were analyzed at station 2, station 12 goats and 3, 21. We analyzed the production of milk of goats above 100 days of lactation to the total output and partial output up to 56 goats were analyzed days of lactation. For reproductive performance reproductive data of 138 goats were analyzed from Anglo Nubian and crossbred Alpine in six mating stations. 34 goats were in season 1, 17 goats in season 2, 26 goats in season 3, 24 goats in the season 4, 13 goats in the season 5:24 goats in season 6. In the analyzes were considered as sources of variation, genotype and time of parturition (calving season). The sources of variation, when significant, were subjected to the test medium, using the Tukey. For all statistical analyzes was admitted to the significance level of 5% probability. Genotype and calving season influenced (P<0.05) in milk production, as for lactation duration was not observed this behavior. The order of birth and calving seasons had no effect (P>0.05) on milk production and duration of lactation. The correlation between the total and partial was positive and significant (P<0.05). The lambing seasons and genotypes affected the reproductive efficiency. Both the production performance and reproductive were considered satisfactory for goat milk production system for the semiarid region.