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合理利用自然资源,尤其对土地资源的利用,乃是国民经济中一个极其重要的课题.对山间坡地进行利用,就是一个很现实的问题.许多山间坡地还不宜于进行农作.在这些土地上开垦耕种,往往引起土壤侵蚀,结果使土壤肥力下降,产量极低.那些前已开垦和已播种多年生牧草,
The rational use of natural resources, especially the use of land resources, is an extremely important issue in the national economy.It is a very practical issue to make use of hillsides, and many hillsides are not suitable for farming. Reclamation and cultivation on land often leads to soil erosion, resulting in a decline in soil fertility and very low yields. Those perennial forages that have been reclaimed and sown before,