一、导言在辽阔的草地上,分布着多种多样的野生植物,其中既有形形色色的优良牧草;也斑斑点点的混生一些有毒有害植物;虽然它们的种类、数量占的比例不大,但其危害程度确实不小。鉴于我辽宁省当前畜牧事业,仍然沿循着古老的方式饲养放 I. INTRODUCTION In the vast grasslands, there are a great variety of wild plants distributed, including both excellent forage species as well as speckled mixed poisonous and harmful plants. Although their species and numbers account for a small proportion, their Degree of harm is indeed not small. In view of the current animal husbandry in Liaoning Province, I still keep feeding along the ancient ways