青海门源地区杂种荷斯坦后备牛生长发育分析

[目的]为了掌握杂种荷斯坦后备牛生长发育规律。[方法]测定101头青海门源地区杂种荷斯坦奶牛育成牛体斜长、体高、胸围分析后备牛生长发育状况。将测量所得原始数据进行计算、处理与根据中国荷斯坦后备母牛各阶段体尺标准进行对照,加以分析、研究。[结果]在总体生长水平上,后备牛生长发育出现严重不足,尤其以胸围受阻情况最为严重,其中初生至六月龄阶段生长强度不足更为明显,导致育成母牛因生长发育不良而推迟发情,不能及时投产,造成育成牛比例过大,牛群结构不合理。[结论]需要严格执行后备牛饲养管理技术规范,制定合理的营养水平,建立和强化后备牛的选育体系。

Analysis of Growth and Development of Replacement Holstein Cow in Qinghai Province

【Objective】The purpose was to master the growth and development rule of replacement Holstein cow in Qinghai Province.【Method】 The oblique body length,height and chest measurement were measured to analyze the growth and development conditions of 101 cross Holstein cow Menyuan area in Qinghai province.The original data was calculated and processed,then was analyzed and compared with the body size standard of Chinese Holstein cow in different stages.【Result】Based on the growth analysis,the growth and development conditions of the replacement cows was acute shortage,especially on chest measurement at the age between nascence and six months old,which caused the delay of heifer＇s estrus and unreasonable structure of cow population.【Conclusion】The technical manual of feeding and management for replacement cow should be executed strictly,develop a reasonable level of nutrition,establish and strengthen the breeding system of replacement cows.