Análises estruturais para componentes de características do leite e índices reprodutivos em bubalinos leiteiros

Abstract

From a productive point of view in livestock production, a milk production and milk quality is a main segment of income. with the expressive growth of buffalo herds in the country, there is a need to increase production rates. The objective of the present study was the proportion of a general index model that relates milk characteristics to those of reproductive efficiency, as well as to establish a set of related indicators as latent variables. The data used in the study come from Tapuio Farm, participants in the dairy control program promoted by UNESP, Jaboticabal campus. For the formation of the blocks, we used: Cumulated production up to 305 of milk (PL), fat (PG) and protein (PP), % fat (porprot), protein (porprot) and CCS, as well as duration of lactation (DL_EST), to form the milk characteristic block (CLEITE), P365, P730 and PS formed the efficient reproductive block (REPROD) and Block Success (SUC) were considered as IEP, IPP and PM. For a statistical analysis of the data, using the PLS - Path modeling package, make software R. As correlations obtained show that when animals are selected considering the production parameter, there is a slight decrease in reproductive characteristics, there is a gain in success. Track analysis can be used as an alternative to evaluate our different production systems, taking into account how different production and reproduction variables. The so-called successful animals should be balanced animals, such as good milk production and quality, and lower weights and age at first calving.