瑞士棕色x宿务和西门塔尔x宿务奶牛在热带条件下的繁殖分析

Pub Date : 2019-12-27 DOI:10.21897/rmvz.1637

Ángel Ríos Utrera, Eugenio Villagómez Amezcua Manjarrez, J. P. Zárate Martínez, René Carlos Calderón Robles, Vicente Eliezer Vega Murillo

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引用次数: 3

摘要

客观的比较在热带环境中饲养的Brown Swiss x Zebu和Simmental x Zebu杂交奶牛的生育能力。材料和方法。对185头不同比例的欧洲品种的Brown Swiss x Zebu和Simmental x Zebu杂交奶牛的繁殖特性进行了评价。轮流放牧奶牛。在小牛的帮助下，每天挤奶两次，小牛在挤奶时被捆在水坝旁边。根据重复测量模型对性状进行评估（除了第一次产仔时的年龄）。用SAS的PROC-MIXED分析产仔间隔、首次产仔年龄、开放天数、从产仔到首次服务的间隔和产仔时的体重。使用同一软件的PROC GENMOD分析首次服务的妊娠率和每次受孕的服务。后果西门塔尔x泽布奶牛在产仔后提前39天开始重新繁殖（p<0.05），与棕色瑞士x泽布牛相比，开放天数减少了47天（p<0.05）。西门塔尔x斑马奶牛的产仔间隔比棕色瑞士x斑马奶牛短45天（p<0.05）。西门塔尔x泽布奶牛在产仔时比棕色瑞士x泽布牛重34公斤（p＜0.05）。结论。西门塔尔x泽布奶牛比棕色瑞士x泽布牛具有更好的生育能力。

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Análisis reproductivo de vacas Suizo Pardo x Cebú y Simmental x Cebú en condiciones tropicales

Objective. Compare the fertility of Brown Swiss x Zebu and Simmental x Zebu crossbred cows reared in a tropical environment. Materials and methods. Reproductive traits of 185 Brown Swiss x Zebu and Simmental x Zebu crossbred cows with diverse percentages of European breed were evaluated. Grazing of cows was rotational. The milking was twice daily with the help (suckling) of the calf, which was kept tied next to the dam while she was milked. Traits were evaluated fitting a repeated measures model (except for age at first calving). Calving interval, age at first calving, days open, interval from calving to first service, and weight at calving were analyzed with PROC MIXED of SAS. Pregnancy rate at first service and services per conception were analyzed with PROC GENMOD of the same software. Results. Simmental x Zebu cows started to re-bred 39 days earlier after calving (p<0.05) and had 47 fewer days open (p<0.05) than Brown Swiss x Zebu cows. The calving interval of the Simmental x Zebu cows was 45 days shorter (p<0.05) than that of the Brown Swiss x Zebu cows. Simmental x Zebu cows were 34 kg heavier at calving (p<0.05) than Brown Swiss x Zebu cows. Conclusions. Simmental x Zebu cows had better fertility than Brown Swiss x Zebu cows.

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