在营养、技术和社会经济因素的制约下，目前对大多数替代饲料的利用微乎其微。
The use of most alternative feedstuffs is currently negligible, owing to constraints imposed by nutritional, technical and socio-economic factors.
影响动物利用饲料或营养素的因素及其解决途径和适宜的营养环境。
The influencing factors of animals to take advantage of feedstuff and nutrients, and resolving methods.
我国有着极其丰富的粗饲料资源，由于粗饲料的适口性差及纤维素含量高等因素，利用率较低。
There are very rich resources of coarse feeds in our country. The coarse feeds are fewer utilized due to their poor taste, high content of cellulose and etc.
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