摘要
本研究每逢双月中旬跟踪绵羊放牧,模仿绵羊摄取可采食性牧草种类、部位和数量,采集各种牧草样品,分类计算重量,按重量比例制成风干混合样品,按常规分析方法测定样品粗蛋白、粗脂肪、粗纤维、无氮浸出物、Ca、P、灰分的含量并计算总能。总体来说,6、8、10月份牧草营养成分含量较高,12、2、4月份牧草营养成分含量较低。因此为了提高新疆天山北部地区放牧绵羊的生产水平,必须对绵羊在冬、春季节进行补饲,以保证绵羊全年营养均衡供应。
n this study, herding sheep was followed-up during the middle of the bi-monthly, their taking grass samples were collected according to the grass type, position and number of sheep gazing. The weights of grass were measured after classification, and were made into air- dry mixed samples each weight. Determination of samples of crude protein, crude fat, crude fiber, nitrogen-free extract, Ca, P, ash content and total energy were made according to the conventional method of analysis. On the whole, higher nutrient content in grass on March June, August, October, low nutrient grass on month December, February and April. Therefore, in order to improve the grazing sheep production level in the northern region of Tianshan Mountains of Xinjiang, the sheep forage must be added in winter and spring in order to ensure a balanced supply of nutrients throughout the year.
出处
《家畜生态学报》
2008年第5期90-92,共3页
Journal of Domestic Animal Ecology
关键词
放牧
绵羊
牧草
grazing
sheep
torage
