种草对马尾松林地植被多样性的影响

Influence of Planting Grasses on Vegetation Diversity of Masson Pine Trees Area

治理前 ,试验地植物种类稀少 ,水土流失严重 ,1983年种植 2 0余种草本植物进行治理 ,翌年植被覆盖恢复 ,基本控制了水土流失。 17年后林下植物种类组成发生较大变化 ,共有 14种灌木、8种草本和 1种藤本植物 ,前期种植的草本植物已退出。但由于土壤贫瘠、干旱 ,林下植被中耐干旱瘠薄的灌木和芒萁占绝对优势 ,Shannon wiener等多样性指数和均匀度指数仍较低 ,进展演替极为缓慢。如何对群落进一步进行调控和管理 ,以加速进展演替 ,有待进一步研究。

Before treatment, the variety of plant of the pilot area is few and soil and water loss is severe. Since more than 20 herbs were planted in 1983, the vegetation cover was rehabilitated in the next year and soil and water loss was basically controlled. 17 years later, the composition of plant variety under the trees has changed greatly. There are all together 14 kinds of shrubs, 8 kinds of herbs and 1 liana. The herbs planted in early days have withdrawn from the region. Due to impoverished soil and arid, drought enduring and impoverished soil enduring shrubs under the trees make up absolute predominance, the diversified index and uniformity index of Shannon wiener are rather low and progress and succession are extremely slow. How to further regulate and control the community and speed up the progress and succession, it awaits a further study.