红三叶的饲料价值,很大程度上决定于黄酮类化合物的种类和数量,特别是雌激素异黄酮(鸡豆黄素、花柄花黄素、染料木黄酮和大豆黄素)。红三叶青草中富含这类物质。大家知道,植物雌激素降低羊的繁殖力,但数量适当时则对羊的生长有良好影响,还能促进牛肉和牛奶产量提高。根据现有资料,由于饲料中鸡豆黄素和花柄花黄素这类异黄酮含量高,破坏了家畜繁殖力。这 The feed value of the red clover is largely determined by the type and amount of flavonoids, especially the estrogen isoflavones (chitin, rhodochin, genistein and daidzein). Red clover grass is rich in these substances. As we all know, phytoestrogens reduce the fecundity of the sheep, but the quantity, when appropriate, has a good effect on the growth of the sheep and also promotes the production of beef and milk. According to the available information, due to the high content of isoflavones such as chitin and rhodochin in feed, the fecundity of livestock is destroyed. This