Plant biodiversity of different water conservation forest models and their relationship with soil properties in northern water source area of Chongqing city, southwestern China
In Jinyun Mountain, Chongqing city, water conservation forest and woodland soil of eight forest models were taken as study objects. Plant biodiversity of water conservation forest models and their relationship with soil properties were studied. The species diversity of eight forest communities were expressed with diversity index(Shannon-Wiener index, Simpson index), evenness index(Pielou index) and richness index(Margalef index). Twelve soil indicators were selected to describe soil physical properties and nutrient characteristics, including soil bulk density, capillary pore, non-capillary pore, organic matter, active acid(pH), total N, total P, total K, available N, available P, available K and soil cation exchange capacity(CEC). The results showed that the species diversity of Lindera kwanglungensis×Cunninghamia anceolata mixed forest was the highest, followed by Pinus masson-ianax-Lindera kwangtungensis mixed forest, and Phyllostachys pubescens forest was the worst. There are significant difference of soil characteristics in each forest model forest. The soil quality of Phyllostachys pubescens pure forest was the poorest. Coni-fer-broadleaved mixed forest play a significant role in improving species diversity and soil quality, however, the effect of coniferous forest and pure forest was poor. Correlation analysis of species diversity index and soil characteristics factor showed that plant diversity indices of different water conservation forest modes related to soil characteristics of communities, significantly to soil nutrient characteristics, but not obvious to soil physical properties characteristics. Total N and total K have significant or quite significant positive correlation to all four full-diversity indices. Organic matter, CEC and available P significant positively correlated to Shannon-Wiener index and Simpson index. Organic matter and total N, had the closest relationship with species diversity.
国家科技期刊平台
NSTL
万方数据
维普
