高寒草地罗新藏母羊冷季体重测定

为了探索在青藏高寒草地这一特殊生态条件下罗新藏母羊冷季的体重变化规律，为冷季补饲提供基础数据，对成年的罗新藏母羊和９月龄后备羊在冷季（１１月１日至４月３０日）的体重进行了测定。结果表明：怀孕母羊平均失重２０ｋｇ／只，平均１１１ｇ／只·天，其中以１１月１日至１２月１０日为最高，平均失重１４９ｇ／只·天；后备母羊失重１８．９２ｋｇ／只，失重率达４２．２０％，超过怀孕母羊（３５．２０％），平均失重１０６．３ｇ／只·天

BODY WEIGHT DETERMINATION OF LUOXINZANG EWE BREED ON APLINE RANGELAND AREAS AT COLD SEASONAL STAGE

For the sake of exploring the natural law governing the body weight change variation in Luoxinzang ewe breed and providing the basic data for feeds supply in cold seasons, the body weight of adult Luoxinzang ewe and 9 months old ewe′s sheep reservation were determined in cold season by the date from November 1st to April 30th as according to the special ecological conditions in Qinghai Tibet Alpine Rangeland Areas. It was concluded that the average weight loss of pregnant ewe was 20 kg per head and 111 g per day, among them, from November 1st to December 10th, the mean weight loss went on to the highest, i.e., 149 g per head per day; the weight loss in reserved ewe was 18.92 kg per head, far exceeding the rate of the same weight loss in pregnant ewe by a percentage of 35.20%,it was said, the mean weight loss being 106.3 g per head per day.