黄土高原草地合理利用与草地植被演替过程的试验研究

本文针对黄土高原草地植被退化严重，畜牧业发展低而不稳等现状，开展了草地合理利用与草地植被演替过程的试验研究。结果表明，三种草地类型，不同处理的生物量形成，植物群落结构，建群种变化的差异十分显著，尤其是割草区和限制放牧区处理有利于草地的永续利用和维持生态平衡，而完全保护区由于长期封育，不利草地的繁殖更新和再生，虽能维持一定的产量水平，但增长幅度不大，另外，不同处理对草地群落演替的影响不甚明显。

The Rational Utilization of Grassland and Successional Course of Grassland Vegetation in the Loess Plateau

To the state of serious grassland vegetation degenerating and low development of animal husbandry,the paper made the research for the rational utilization of grassland and the successional course of grasslandvegetation. The results showed that there was a significant difference in biomass forming of differenttreatmnet,plant community structure and the change of constructive species in the three grassland types,especially beneficial to the sustaining utilization of grassland and maintaining the ecological balance in thecutting plot and confined grazing plot.Due to a long time closing in the fully protecting plot,that was notbeneficial to renew and regrowth of grassland,though it could maintain some preduction level,the increasewas not great.And,however,there would be no significant influence in different treatment on grasslandcommunity succession.