论文部分内容阅读
为了完善云南热区人工林群落学的基础资料,采用样方法对西双版纳州普文试验林场3种进入成熟期的人工林开展群落学调查,并与地带性植被山地雨林及退化次生林进行比较研究。结果表明,(1)加勒比松人工林有维管束植物43种,望天树、绒毛番龙眼混交林有维管束植物32种,米老排、南酸枣混交林中有维管束植物29种;(2)3种人工林乔木层的香农威纳指数(H’)在1.82~2.71,灌木层的香农威纳指数(H’)在1.52~1.78,草本层的香农威纳指数(H’)在2.15~2.69,加勒比松人工林群落的物种多样性最高;(3)3种人工林群落垂直结构明显,可初步的分为乔木层Ⅰ层、乔木Ⅱ层、灌木层和草本层;(4)3种人工林群落在物种丰富度、多样性指数方面低于山地雨林和退化次生林,在群落垂直结构划层方面比退化次生林复杂,但比山地雨林简单。
In order to improve the basic data of plantation community in the hot area of Yunnan, three community-based plantations in mature stage of Puwen Experimental Forest Farm of Xishuangbanna Prefecture were surveyed and compared with the zonal vegetation of mountain rain forest and degraded secondary forest. The results showed that: (1) There were 43 vascular plants in the Pinus caribaea plantation, 32 vascular plants in the mixed plantation of P. crassicarpa and P. longissima, and 29 species of vascular plants in the mixed forest of Meilaozai and S. sibirica. 2) The Shannon-Wiener index (H ’) and the Shannon-Wiener index (H’) of the arborous layer in the three kinds of plantations ranged from 1.82 to 2.71 and 1.52 ~ 1.78, 2.15 ~ 2.69, the species diversity of Pinus caribaea plantation community is the highest; (3) The vertical structure of the three plantations is obvious, which can be divided into the first layer of tree layer, the second layer of tree layer, the shrub layer and the herb layer; The three kinds of plantation communities were lower than those in the mountain rainforest and the degraded secondary forests in species richness and diversity index. They were more complicated than degraded secondary forests in the vertical structure strata of the community, but simpler than the mountain rainforest.