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The analysis of reproductive parameters in sheep of mixed wool in Poland in the years 2005-2015

机译：2005-2015年波兰混合羊毛绵羊生殖参数分析

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摘要

The aim of this paper was to analyse the reproductive parameters (fertility, prolificacy, number of lambs raised and reproductive performance) in sheep of mixed wool in Poland in the years 2005-2015. In the years subject to analysis a decline was observed, both in the population of sheep and in the population of ewes of all breeds and varieties entered in the herd books in Poland. A growth was noticed, however, in the population of four conservation breeds (heath sheep, ?winiarka sheep, coloured Polish mountain sheep and podhale zackel sheep), which constituted in 2015 25.6% of domestic population of ewes entered in the herd books. The growing number of the studied ewes' populations was nevertheless parallel with negative development tendencies in terms of the evaluated reproductive parameters.
机译：本文的目的是分析波兰2005-2015年混合羊毛绵羊的繁殖参数（繁殖力，繁殖力，羔羊数和繁殖性能）。在进行分析的年份中，在波兰的牧群书籍中输入的所有品种的绵羊和羊群数量均下降。但是，注意到四个保护品种（荒地绵羊，？winiarka绵羊，有色波兰山区绵羊和podhale zackel绵羊）的数量有所增长，2015年，进入该牧群的母羊占国内母羊总数的25.6％。然而，就评估的生殖参数而言，所研究的母羊种群数量的增长与负的发展趋势平行。

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