四川省山羊主产区常用饲料营养价值分析

分别测定了四川简阳、乐至、自贡、南江和双流5个地区山羊常用的3类（青草、秸秆和蚕沙）饲料的常规营养成分和矿物元素含量。结果表明，1）青草类和蚕沙的营养价值较高，粗蛋白的平均含量分别为13.94%和13.03%，粗纤维的平均含量分别为31.76%和18.33%，可作为优质饲料饲喂山羊；秸秆类的营养价值较低，粗蛋白和粗纤维的平均含量分别为7.52%和44.55%，可作为山羊粗饲料不足时的补充。2）饲料中矿物元素钙、钾、镁和铁含量较高，能满足山羊的基本需要，钠、磷、铜、锌、锰和硒含量不能满足基本需要，需额外补充。

Analysis of nutritional value of common used forages in the goat production area in Sichuan Province

Conventional nutrients and mineral elements of 12 common used forages(fresh grass,straw and silkworm) in five regions of Jianyang,Lezhi,Zigong,Nanjiang and Shuangliu in Sichuan Province were respectively measured in this study.The results showed that(1) Fresh grass and the silkworm had higher nutritional value compared with other forages.The crude protein contents in above forages were 13.94% and 13.03%,and crude fiber contents were 31.76% and 18.33%,so that they could be used as high-quality forages for goats.The straw had lower nutritional value;its protein contents and crude fiber contents were 7.52% and 44.55% respectively.They could be used as supplements when the roughage was insufficient.(2) The contents of calcium,potassium,magnesium and iron in the forages were higher and could meet the basic requirements of animals.However,the additional phosphorus,sodium,zinc,copper,manganese and selenium should be supplemented due to be not enough for animal growth.