Desenvolvimento ponderal de cordeiros provenientes de ovelhas gestantes mantidas em pastagem a pleno Sol e em Sistema Silvipastoril

Abstract

Sheep farming has been looking for space in the production of animal protein before the consumer market, and it is proving to be a very interesting activity for Brazilian producers. In order to obtain good results, controlling the zootechnical indices is extremely important, an example to be mentioned is the monitoring of the weight development of lambs, a technique that aims from the biometric measures, to observe the development of the animals from birth to weaning, however, this growth can be influenced by several factors, such as genetics and environment. The objective of this work was to evaluate the weight development of lambs from crossbred Dorper X Santa Inês ewes, kept on pasture in full sun and in the silvopastoral system. The work was carried out at the Federal Technological University of Paraná (UTFPR), Dois Vizinhos Campus, at the Sheep and Goat Research Unit (UNEPE). Fifteen born lambs were used, divided into two treatments, namely: full sun (6) and silvopastoral system (9). The measurements used for the evaluation were: body length, rump height, withers height, thoracic perimeter and abdominal perimeter along with body weight, with the aid of an adapted ruler, tape measure and digital scale. According to the occurrence of births, weight was collected, and every 21 days, morphometric measurements were collected. The results found for the different treatments showed a significant difference (p<0.05) for the animals from pregnancies in full sun, they had better performance for rump and withers, since the results obtained for the different periods did not show difference. In view of the results obtained in this research, a better performance in rump height and withers height was observed in lambs born from gestation in full sun system, when compared to silvopastoral system.