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加拿大农场奶山羊育羔实践调查及其与自我报告的农场绩效的关系。

A survey of dairy goat kid-rearing practices on Canadian farms and their associations with self-reported farm performance.

机构信息

Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, Québec H9X 3V9, Canada.

Département des Sciences Animales, Université Laval, Québec, Québec G1V 0A6, Canada.

出版信息

J Dairy Sci. 2021 Sep;104(9):9999-10009. doi: 10.3168/jds.2020-18663. Epub 2021 Jun 5.

Abstract

Although future production of dairy goats is influenced by kid-rearing practices, little is known regarding which practices maximize kid growth, welfare, and future production success. The objectives of this survey study were to (1) identify common rearing practices of Canadian commercial dairy goat farms and evaluate their associations with 6 farm performance indicators and (2) determine if farms could be grouped by management style on the basis of the 6 performance indicators and compare rearing practices common across the different groups. A survey was sent by post or electronic media to reach dairy goat producers across Canada. The questionnaire contained 70 questions on the following areas of kid rearing: kidding management, care of newborn, colostrum management, milk and solid feeding in the preweaning period, health management, disbudding, housing conditions, weaning strategies, record keeping and growth monitoring, and farm performance data. Performance indicators, calculated on self-reported data, were 305-d milk production, preweaning mortality rate, diarrhea and respiratory disease prevalence, average daily gain from birth to weaning, herd milk production, and replacement rate. A total of 175 questionnaires were returned. After applying inclusion criteria, including herd size (≥40 goats) and completeness of surveys, 104 respondents from Ontario (n = 72, 69%), Québec (n = 23, 22%), and the Western provinces (n = 9, 9%) were retained for analysis, representing 29% of all Canadian producers. Farm sizes ranged from 42 to 2,500 (median = 190) goats. A large amount of variation in rearing practices and farm performance was found between farms. Colostrum and milk feeding management were found to be associated with all performance indicators except for kid respiratory disease prevalence, with timing of colostrum delivery and feeding method accounting for most the associations within each of the 2 areas. Replacement rate was mostly affected by whether or not kids were reared with their dam. Herds surveyed in the study could successfully be divided into 3 distinct groups (production-focused, longevity-focused, and low performance), representing different management styles on the basis of farm self-reported performance levels. Rearing practices found to be associated with higher farm performance could be targeted by advisory services to help improve management practices on Canadian dairy goat farms.

摘要

尽管未来奶山羊的产量受到育羔实践的影响,但对于哪些实践可以最大限度地提高羔羊的生长、福利和未来的生产成功,人们知之甚少。本研究的目的是:(1)确定加拿大商业奶山羊场常见的饲养方式,并评估其与 6 项农场绩效指标的关系;(2)确定是否可以根据这 6 项绩效指标将农场分组,并比较不同组中常见的饲养方式。通过邮寄或电子媒体向加拿大各地的奶山羊生产者发送了一份调查问卷。问卷包含 70 个关于以下育羔领域的问题:产羔管理、新生仔畜护理、初乳管理、哺乳期前的牛奶和固体饲料、健康管理、去角、住房条件、断奶策略、记录保存和生长监测以及农场绩效数据。根据自我报告的数据计算了 6 项绩效指标,分别为 305 天产奶量、哺乳期前死亡率、腹泻和呼吸道疾病患病率、从出生到断奶的平均日增重、牛群产奶量和更新率。共收回 175 份问卷。在应用纳入标准(包括畜群规模(≥40 只)和调查的完整性)后,保留了来自安大略省(n = 72,69%)、魁北克省(n = 23,22%)和西部省份(n = 9,9%)的 104 名受访者进行分析,这代表了所有加拿大生产者的 29%。农场规模从 42 只到 2500 只(中位数=190 只)不等。发现不同农场之间的饲养方式和农场绩效存在大量差异。初乳和牛奶的喂养管理与除羔羊呼吸道疾病患病率以外的所有性能指标相关,初乳的输送时间和喂养方法在这两个区域内的每个区域内都占了大多数的关联。更新率主要受羔羊是否与母羊一起饲养的影响。根据农场自我报告的绩效水平,调查的畜群可以成功地分为 3 个不同的群体(以生产为重点、以长寿为重点和低性能),代表不同的管理风格。与较高农场绩效相关的饲养方式可以通过咨询服务来针对,以帮助改善加拿大奶山羊农场的管理实践。

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