Journal of Guangxi Normal University(Natural Science Edition) ›› 2025, Vol. 43 ›› Issue (4): 201-212.doi: 10.16088/j.issn.1001-6600.2024071901

• Ecology and Environmental Science Research • Previous Articles     Next Articles

Effects of Different Stand Densities on Soil Properties and Understory Vegetation in Chinese fir Plantation

ZUO Xiaodong1,2, WANG Xinxin3, XU Zuyuan1,2, ZHENG Hong4, CAO Guangqiu1,2, CAO Shijiang1,2*   

  1. 1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou Fujian 350002, China;
    2. National Forestry and Grassland Chinese fir Engineering Technology Research Center, Fuzhou Fujian 350002, China;
    3. Xiamen Ocean Vocational College, Xiamen Fujian 361100, China;
    4. Fujian Yangkou State Owned Forest Farm, Nanping Fujian 353200, China
  • Received:2024-07-19 Revised:2024-09-30 Online:2025-07-05 Published:2025-07-14

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Abstract: In order to understand the effects of different stand retention densities on the soil characteristics of Cunninghamia lanceolate plantations, the soil water content, stoichiometric ratio, enzyme activity and understory vegetation diversity of Chinese fir plantations under different stand retention densities were studied in the experimental forests with different stand retention densities in Yangkou State Owned Forest Farm in Fujian Province. The results showed that: 1) There was no significant effect on the species richness index and Shannon-Wiener index in the understory vegetation diversity of Chinese fir plantations under different retention densities (P>0.05), but it had a great impact on Simpson index and Pielou evenness index. 2) There were significant differences in soil chemical properties among different stand retention densities (P<0.05), as stand retention density increased, total carbon content of soil increased first and then decreased. Soil total nitrogen decreased first and then increased. 3) The retention density of different stands had a significant effect on soil enzyme activity (P<0.05), among which,with the increase of stand retention density, the activities of polyphenol oxidase and acid phosphatase decreased in soil, while the activities of soil urease and soil sucrase increased. 4) Different stand retention densities had significant effects (P<0.05) on soil microbial dominant bacterial communities, and low stand density treatment could improve the structural diversity of soil microbial bacterial communities to some extent. In the correlation analysis between soil bacterial communities and physicochemical properties, TP, effective phosphorus content (AP) and soil dominant bacterial group (Actinobacteria) were highly significantly correlated (P<0.01). TC and TN were highly significantly correlated (P<0.01) with the dominant bacterial group (Zoopagomycota). Overall, low stand retention density is the best choice for planting Chinese fir plantations.

Key words: stand density, Cunninghamia lanceolata plantation, soil enzyme activity, vegetation diversity, soil microorganism

CLC Number:  S722.5
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