Effects of time of parturition, shearing and flushing on lambing to estrus interval in Polwarth ewes.

  • F. Ebling Rodrigues Facultade de Agronomia, Departamento de Zootecnia Universidade Federal Rio Grande do Sul
  • Luis Carlos de Oliveira Fernandes Facultade de Agronomia, Departamento de Zootecnia Universidade Federal Rio Grande do Sul

Abstract

The objective of this study was to evalúate the effects of time of parturition, flushing and time of shearing on lambing to estrus interval in two consecutive years, using 93 and 94 Polwarth ewes, respectively. These animáis were randomly assigned to 8 treatments in a 2x2x2 factorial arrangement: lambing in fall vs spring; flushing on ¡mproved pasture; and shearing in October vs December. Animáis were observed daily for estrus signs, aided by 3% of marked teasers. The lambing to estrus interval was shorter (P<0.01) in ewes lambing in the spring than in fall (142 vs 231 and 113 vs 174 days, irespectively, in the first and second year). Flushing reduced (P<0.05) the lambing to estrus interval only in the second year (139 vs 148 days), and shearing did not affect this interval (P>0.05). A reduction in lambing to estrus interval was observed from the first to the second year and this may be due to parity, Uve weight or even differences between years.

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Published
1993-06-30
How to Cite
Rodrigues, F. Ebling, and Luis Carlos de Oliveira Fernandes. 1993. “Effects of Time of Parturition, Shearing and Flushing on Lambing to Estrus Interval in Polwarth Ewes.”. Latin American Archives of Animal Production 1 (1), 17-21. https://ojs.alpa.uy/index.php/ojs_files/article/view/2241.
Section
Original paper