营养菌剂对枯草期和青草期绵羊的增重试验

Effect of Nutritional Bacteria on the Body Gain of sheep Grazed in Rangeland during hibernation and Growth Periods

用自制的营养菌剂在枯草期和青草期对青海省湖东种羊场的种羊和土种羊分别进行灌服试验，１５ｄ灌服１次，枯草期灌服８次，青草期灌服７次，每次每只羊５ｍｌ。结果表明：在枯草期，种羊试验组平均增重４．０３ｋｇ，对照组增重３．１４ｋｇ，土种羊试验组平均增重０．０１ｋｇ，对照组增重－１．２１ｋｇ；在青草期，种羊试验组平均增重４．１５ｋｇ，对照组增重３．４０ｋｇ，土种羊试验组平均增重１．７２ｋｇ，对照组增重１．３１ｋｇ。两期试验中各群试验组的增重效果均显著（Ｐ＜０．０５）。

A nutritional bacteria mixture developed by the authors was orally given to breeding sheep and local sheep in Hudong Breeding Sheep Farm.Each animal received 5ml of the bacteria mixture at 15 day ivtervals.The bacteria mixture was given to sheep for 8 times during grass hibernation period and 7 times during growth period.The growth of both sheep was observed. During the grass hibernation period.body gain of breeding sheep in experimental group was higher (4.03kg) than in control group (3.14kg),body gain of local sheep was lightly possitive in experimental group (0.01kg) and was negative in control group (-1.21kg).In the grass growth period,the body gain of breeding sheep was 4.15kg in experi mental group and was 3.40kg in control group. corvesponding values for local sheep were 1.72kg and 1.31kg respectively.No negative effect was found in the sheep given bacteria mixture \ \