摘要
根据动物饲养标准,运用理论计算研究了放牧绵羊的营养需要和草地供应等家畜生产、草地管理问题.结果表明:天然草地放牧绵羊随日增重水平提高,达到期望生长量所需日数减少,所需能量和粗蛋白也逐渐减少;自由放养绵羊的日增重水平相当于舍饲饲养100g的日增重水平,北方草地在自由放养的基础上,选择150～200g的日增重水平进行设计饲养可以获得明显的经济效益和生态效益;每只羊每年补饲100kg苜蓿和50kg玉米秸秆可以满足设计饲养要求,实现当年生羔羊羯羊体重达到46kg、胴体重21kg的国际先进饲养水平.
<Abstrcat>With increasing of daily growth, feeding period to expectation body weight of sheep decreased, metabolism energy and crude protein needed for the sheep growth also decreased. Daily gain of the body weight of sheep extensive grazing in natural grassland in north China is about 100 g. Through designed feeding , i.e. , supplied 100 kg alfalfa forage and 50 kg cornstalk per sheep per year could gain more than 150 g/d.h of live weight and made the lamb live weight over 46 kg in 9—10 month age.
出处
《东北师大学报（自然科学版）》
CAS
CSCD
北大核心
2005年第2期80-85,共6页
Journal of Northeast Normal University(Natural Science Edition)
基金
国家重点基础研究发展项目(G200008606)
关键词
绵羊
营养需要
自由放养
设计饲养
sheep
nutrition requirements
extensive grazing
designed feeding
