近自然經(jīng)營(yíng)對(duì)旺業(yè)甸森林灌草植物多樣性影響的研究
[Abstract]:Near-nature management is one of the hotspots in forest management research. It is of great significance to study the species diversity of near-natural management for the protection of forest biodiversity. In this study, artificial Pinus tabulaeformis forest, artificial larch forest and natural birch forest at the northern foot of Yanshan Mountain were used as research objects. The variation of diversity index and the correlation between herbaceous diversity index and litter and soil were studied. The results are as follows: (1) from the species level, near-natural management can increase the species and quantity of herbaceous plants, and artificial Pinus tabulaeformis forest. The total number of herbaceous species under artificial larch forest and natural birch forest all showed the same law, which was not managed by conventional management. In addition, management measures can increase the species and number of shrubs under the forest. (2) from the species diversity index, the near natural management can increase the diversity and richness of three kinds of herbaceous plants, and reduce the evenness. The Shannon-Wiener index (SH) was significantly higher than that of the unmanaged herb in the middle age of artificial Pinus tabulaeformis stands, and the Pielou evenness index (PL) was significantly higher than that in the near natural management in the near mature forest. The Margalef richness index (MR) of undergrowth herbaceous plants in artificial larch stands was significantly higher than that in unmanaged forests, and the Pielou evenness index was significantly higher than that in natural Bai Hua forests. (3) the index of herbaceous diversity and litter was significantly higher than that of non-natural management. Pearson correlation analysis showed that the Pielou evenness index of young larch plantation was significantly positively correlated with soil bulk density and soil maximum water holding capacity of soil 10-20cm. There was a significant negative correlation between Pielou evenness index and soil bulk density and maximum soil water holding capacity in soil layer 10-20cm, and a significant negative correlation between Pielou evenness index (SM) and semi-decomposed litter biomass in the near mature forest of Pinus tabulaeformis. Capillary porosity in soil 10-20cm was negatively correlated with herbaceous Pielou evenness index. On the basis of the above results, we can understand the variation of plant species diversity under different management modes, and provide a theoretical basis for the selection of forest management modes in North China.
【學(xué)位授予單位】:內(nèi)蒙古農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:S750;S718.5
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