由于人类对草原的掠夺式利用及各种破坏活动,使得全世界天然草场的生态环境和生产性能趋于恶化,天然草场的牧草产量大幅度下降,牧草的品质趋于劣化。为此,仅依靠天然草场生产的牧草已远远不能满足飞速发展的畜牧业生产的需要。为了缓解草畜矛盾,国外通过建立人工草地及半人草地极大地提高了草地牧草 Due to predatory human use of grasslands and various sabotage activities, the ecological environment and production performance of natural pastures in the world tend to deteriorate. The output of pasture in natural grasslands has dropped drastically, and the quality of pastures tends to deteriorate. For this reason, forages that rely solely on natural pastures are far from meeting the needs of rapidly growing livestock production. In order to alleviate the contradiction between grass and animal husbandry, the establishment of artificial grassland and semi-human grassland greatly improves the grass pasture