西北半干旱区不同治理措施下的植被恢复对比分析

Comparative Analysis of Vegetation Recovery Effects under Different Treatment Measures in Semi-arid Region in Northwest China

为了研究西北半干旱区不同荒漠化治理措施下的植被的情况,在宁夏盐池县,选取该县的退耕还林、撂荒地和人工封育3种不同的治理措施为样地类型,根据样地生境梯度,分别采用样方法和样线法进行植被调查并采集数据。结合生态学和统计学软件对外业数据进行处理,通过计算Shannon-Wiener指数、Simpson指数、群落均匀度指数和生态优势度指数对植被多样性进行研究分析。结果表明:在退耕还林、撂荒地和人工封育3种措施下的植被状况有了一定的增长,人工封育和退耕还林措施的效果比撂荒地好,适合当地的实际情况。

In order to study the situation of vegetation under different desertifieation treatment measures in semi-arid region in northwest China, the fields in Yanchi County of Ningxia City with three different teatment measures, which were returning cultivated land to forestry, abandoned land and artificial fencing, were taken as sample fields to conduct vegetation investigation and collect related data hy using quadrat sampling method and line-intercept method according to the habitat gradient of sample fields. Then, the field data were processed by using ecological software and statistics software, and the diversity of vegetation was analyzed through calculating Shannon-Wiener index, Simpson index, community evenness index and ecological dominance index. The results showed that the situation of vegetation under the three different treatment measures had been recovered at a certain level, and the recovery effect of vegetation under treatment measures of artificial fencing and returning cultivated land to forestry was better than that under treatment measure of abandoned land. Therefore, the treatment measures of artificial fencing and returning cultivated land to forestry are suitable for the local situation.