PRODUÇÃO DE LEITE CAPRINO E ÍNDICES REPRODUTIVOS EM FUNÇÃO DA ÉPOCA DE PARTO E GENÓTIPO EM UM MODELO ALTERNATIVO DE PRODUÇÃO

Abstract

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 at the Experimental Station Pendência (EMEPA-PB), in the municipality of Soledade-PB. Production data were analyzed from 56 goats Anglo Nubian and crossbred Alpine, three lactation stations. In station 1 23 goats were analyzed in 12 goats station 2 at the station 3, 21 were analyzed milk production of the above goats 100 days of lactation to the total output and partial output goats were examined up to 56 days lactation. For the reproductive performance reproductive data of 138 goats were analyzed breeds Anglo Nubian and crossbred Alpine in six mating stations. 34 goats were in Season 1; 17 goats at Station 2; 26 goats at Station 3; 24 goats season 4; 13 goats at Station 5; and 24 goats at Station 6. The work was carried out in the period 2012 to 2015. In the case of milk production are recognized as sources of variation: genotype and age of calving (calving season). The sources of variation, when significant, were subjected to the test medium using the Tukey test. For all statistical analyzes was admitted to the significance level of 5% probability. The genotype and season influence on milk production in lactation duration genotype and the station did not influence. The delivery order and the seasons had no effect on milk production and duration of lactation. The correlation between total and partial production was positive and significant. Stations and genotypes affected the reproductive efficiency. Both the production performance and reproductive were considered satisfactory for a model system on a sustainable basis for the semiarid region.