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.
通过IBD这一指数，可以对各种单一饲料的蛋白质营养价值加以分类列等；
The nutritional value of individual feed can be ranked and clustered according to its IBD;
通过IBD这一指数，可以对各种单一饲料的蛋白质营养价值加以分类列等；
The nutritional value of individual feed can be ranked and clustered according to its IBD;
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