桂林丘陵区不同坡位对灌木物种多样性和土壤因子的影响

doi:10.16088/j.issn.1001-6600.2021090601

Abstract

Abstract: Taking shrubs in different slope positions in Jiangjiaba hills of Guilin as the research subjects, and based on the species diversity index and random forest statistical model, this paper made an in-depth analysis of the shrub species diversity of soil factors change with slope position, and clarified the influence mechanism of environmental factors on shrub species diversity. The results showed that: (1)Soil factors such as water content, available nitrogen, organic matter, available potassium, and total phosphorus were significantly different in different slope positions, and their changing laws were: water content appeared in the Foot>Middle>Upper, and available nitrogen appeared in the Middle>Foot>Upper, organic matter and available potassium appeared in the Middle> Upper>Foot, and the total phosphorus appeared in the Foot>Upper>Middle. (2)Species richness, Shannon-Wiener index and Simpson index were significantly different in different slope positions. The former two results showed the Foot>Middle>Upper, and the latter showed the Foot>Upper>Middle. (3)Organic matter, total phosphorus, available nitrogen and water content were the main soil factors that affected shrub species diversity. These results can provide references for species selection and vegetation layout for the ecological restoration and reconstruction of degraded vegetation in subtropical hilly areas.

Key words: slope position gradient, shrubs, species diversity, soil factors, random forest

CLC Number:

Q948.113

ZHUO Wenhua, LI Lixiang, PAN Yuanfang, JIANG Yong, LIN Hongling, HE Yan, FANG Yaocheng, LIANG Shichu, SU Quan. Effects of Different Slope Positions on Shrub Species Diversity and Soil Factors in Guilin Hilly Area[J].Journal of Guangxi Normal University(Natural Science Edition), 2023, 41(1): 192-199.

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Effects of Different Slope Positions on Shrub Species Diversity and Soil Factors in Guilin Hilly Area

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