根据牧草的基本营养价值特性，综合了近年来人们对反刍家畜利用牧草及提高牧草营养价值的生物学研究成果。
According to the basic nutrient characteristic of forage grass, this article generalize the achievement that utilize forage grass in ruminant and improve nutrient value of forage grass.
使用GI值能明显区分养分含量差异很小的不同种类牧草，这说明分级指数是评价牧草营养价值的最权威指标。
Differentiation of a variety of forage with minor nutrient discrepancy by using GI can indicate that GI is an authoritative index evaluating forage quality.
小牛犊出生后的时间恰与牧场牧草最繁荣、营养价值最高的生产周期相符。
Calves born just after the time of the most prosperous and pasture grass, the highest nutritional value consistent with the production cycle.
此时牧草的营养价值也下降了。
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。
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.
苜蓿放牧草地以其成本相对低(与干草型苜蓿草地相比)、营养价值高、放牧家畜生产性能优异得到了家畜生产者的青睐。
Grazing alfalfa pasture is very popular with its low cost, high forage quality and good animal performance for animal producer. Alfalfa has been utilized as hay production for a long time.
随着牧草枯黄程度的增加，牧草总体营养价值呈下降趋势。
It showed that the total nutritive composition of grass was decreased with the increased of grass droop degree.
随着牧草枯黄程度的增加，牧草总体营养价值呈下降趋势。
It showed that the total nutritive composition of grass was decreased with the increased of grass droop degree.
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