摘要
本文采用食道瘘管法取样,对放牧于天然草场的绵羊采食牧草的营养成分进行了研究。结果表明,放牧绵羊在不同类型草地及不同生长期采食牧草的营养价值维持在一个较高的,而且是稳定的水平上。食道瘘管样较人工采摘样含粗蛋白、粗灰分高,含粗纤维低。其中粗蛋白、粗纤维含量在两种样品中的差异随生长季的延长呈增大趋势,从牧草粗蛋白含量高、粗纤维含量低的草地到牧草粗蛋白含量低、粗纤维含量高的草地呈增大趋势。
The esophageal fistula samples were adopted to determine the nutrient content of the diet selected by grazing sheep on rangelands. Results show that grazing sheep can hold nutritive value of their diets on a higher and stable level in all types of rangeland and every stage of growing season. The esophageal fistula samples are higher in crude protein, crude ash and lower in crude fiber than that of hand plucked samples. The difference of crude protein and crude fiber contents between fistula and plucked samples increases from early summer to later autumn and from rangelands with higher crude protein and lower crude fiber forage to that with lower crude protein and higher crude fiber forage.
出处
《中国草地》
CSCD
1992年第5期4-7,12,共5页
Grassland of China
