摘要
试验在吉林省长岭县羊草放牧草地进行,选择体重、年龄相当的1岁东北细毛羊及其羔羊,1岁东×小F1代及杂交羔羊,共12只绵羊。采用灰色系统中灰色关联度的分析方法对羊草草原放牧绵羊日增重的气象限制性因素进行了研究。结果表明:羊草草原放牧绵羊体重呈单峰值曲线,峰值在1月,在其生长的4～12月为增重期,而减重期为1～3月,这种现象具有鲜明的农牧结合特色。东×小F1杂交绵羊在其增重期内日增重始终高于东北细毛羊,差异显著(P<0.05);在其减重期,杂交绵羊的减重也略高于东北细毛羊。灰色关联度分析表明,影响羊草草原放牧绵羊日增重的主要气象因素排序是:降水>温度>日照>湿度>气压>风速,其中降水量和温度是影响放牧绵羊日增重的主要限制性因素。
Experiment was proceeded in Aneurolepidium Chinese grazing grassland of Jilin province, and Northeast fine-wool hogget and lambs,and crossbreed hogget and lambs with similar weight and age (totally 12 sheep) were selected. The analytic method of gray incidence degree in gray system was employed to study the relationship between daily gain of grazing sheep and restrictive factors. The result showed that weight dynamics of grazing sheep in the study area were different from those in Northwest China and Inner Mongolia, characterizing by combination of agriculture and animal husbandry. The F1 crossbreed of Northeast fine-wool sheep x cold-tolerant smal-tailed sheep was larger in both height and body length than that of Northeast fine-wool sheep. Northeast fine-wool sheep was characterized in meat and wool utilization, but its daily gain was slow, a problem to be solved in future. The grey system analysis showed that the order of major meteorological factors that affect daily weight gain of grazing sheep in Aneurolepidium Chinese grassland was precipitation > temperature > illumination > humidity > atmospheric pressure > wind velocity, among which precipitation and temperature were main restrictive factors of daily gain of grazing sheep.
出处
《吉林农业大学学报》
CAS
CSCD
北大核心
2002年第6期82-85,90,共5页
Journal of Jilin Agricultural University
基金
国家自然科学基金(C02030102)项目
教育部科技发展基金资助项目(00043)
关键词
羊草草原
放牧绵羊
体重动态
限制性因素
东北细毛羊
杂交
Northeast fine-wool sheep
crossbreed
weight
restrictive factor
Aneurolepidium Chinese grassland
