干旱区研究 ›› 2025, Vol. 42 ›› Issue (11): 2071-2082.doi: 10.13866/j.azr.2025.11.10

• 植物生态 • 上一篇    下一篇

人工沙棘林地物种多样性及土壤养分变化——以双龙沟矸石山为例

王理德1,2,3(), 李浩3, 何静3(), 陈思航1, 王景瑞1,2, 李诗涵3, 司静怡3   

  1. 1.甘肃省治沙研究所,甘肃 兰州 730070
    2.甘肃民勤荒漠草地生态系统国家野外科学观测研究站,甘肃 民勤 733300
    3.甘肃农业大学林学院,甘肃 兰州 730070
  • 收稿日期:2025-04-24 修回日期:2025-09-01 出版日期:2025-11-15 发布日期:2025-12-13
  • 通讯作者: 何静. E-mail: hejing268@aliyun.com
  • 作者简介:王理德(1969-),男,博士,研究员,主要从事生物多样性及水土保持与荒漠化防治研究. E-mail: 460025211@qq.com
  • 基金资助:
    国家自然科学基金(42167069);甘肃省重点人才项目(GZTZ20240415)

Plant species diversity and soil nutrient alter characteristics of artificial Hippophae rhamnoides forests with different restoration years: A case study of Shuanglonggou Gangue Mountain

WANG Lide1,2,3(), LI Hao3, HE Jing3(), CHEN Sihang1, WANG Jingrui1,2, LI Shihan3, SI Jingyi3   

  1. 1. Gansu Institute of Desertification Control, Lanzhou 730070, Gansu, China
    2. Minqin Desert Grassland Ecosystem National Field Scientific Observation and Research Station, Minqin 733300, Gansu, China
    3. College of Forestry, Gansu Agricultural University, Lanzhou 730070, Gansu, China
  • Received:2025-04-24 Revised:2025-09-01 Published:2025-11-15 Online:2025-12-13

摘要: 为探究双龙沟矸石山不同修复年限人工沙棘林地植物物种多样性及土壤养分的变化规律。以修复3 a、6 a和11 a人工沙棘林地为研究对象,并以未修复的矸石荒山为对照(CK),通过实地调查植被生长情况与土壤养分测定,采用时空替代法探究植物-土壤间的相关性。结果表明:(1) 在修复过程中,样地内出现24科48属65种植物,其中菊科植物占比最大。(2) 随修复年限增加,植物个体数量、物种数、Simpson优势度指数和Margalef丰富度指数整体呈现上升趋势,在修复11 a样地达到最大值,分别为1234株、34种、0.277和3.213; Pielou均匀度指数与Shannon多样性指数整体呈下降趋势。(3) 随土层加深,土壤全氮、全磷、有机质、铵态氮和速效磷显著降低,表聚现象突出;随修复年限延长,全磷、硝态氮和铵态氮含量显著提升。(4) 植物物种多样性与土壤养分密切相关,植物个体数与硝态氮、铵态氮呈极显著正相关,与速效磷呈极显著负相关;植物物种数与土壤pH、全磷、硝态氮、铵态氮呈极显著正相关。Simpson优势度、Margalef丰富度与全磷、硝态氮、铵态氮显著正相关,Pielou均匀度则与速效磷显著正相关,表明土壤全磷、硝态氮、铵态氮和速效磷是影响该区域植物物种多样性的关键养分因子。随着人工修复年限延长,显著提升了双龙沟矸石山地植物物种多样性和土壤养分含量,为废弃矿区生态系统的恢复提供科学依据。

关键词: 人工沙棘林, 物种多样性, 土壤养分, 生态恢复

Abstract:

To investigate the dynamics of plant species diversity and soil nutrients in artificial Hippophae rhamnoides forests with different restoration years in the Shuanglonggou coal gangue area, this study examined plots restored for 3 a, 6 a, and 11 a, using unrestored gangue wasteland as control. Field vegetation surveys were conducted, soil nutrients were estimated, and plant-soil correlations were analyzed using the space-for-time substitution method. The results showed that: (1) During restoration, 65 plant species from 48 genera and 24 families were recorded, with Asteraceae being the most dominant family. (2) The number of plant individuals increased with restoration time, reaching a maximum of 1234 in the 11 a plot. Species richness, Simpson dominance index, and Margalef richness index increased, reaching the peak values at 34, 0.277, and 3.213, respectively, in the 11a plot, whereas the Pielou evenness index and Shannon diversity index showed overall declining trends. (3) Soil total nitrogen, total phosphorus, organic matter, ammonium nitrogen, and available phosphorus decreased significantly with soil depth, showing obvious surface aggregation, whereas total phosphorus, nitrate nitrogen, and ammonium nitrogen increased significantly with restoration time. (4) Plant species diversity was closely correlated with soil nutrients; plant individual count was significantly positively correlated with nitrate nitrogen and ammonium nitrogen and significantly negatively correlated with available phosphorus; and species richness was significantly positively correlated with soil pH, total phosphorus, nitrate nitrogen, and ammonium nitrogen. Simpson dominance and Margalef richness indices were significantly positively correlated with total phosphorus, nitrate nitrogen, and ammonium nitrogen. However, Pielou evenness index was significantly positively correlated with available phosphorus. This indicated that these soil nutrients were key factors influencing plant species diversity in this region. The study demonstrated that prolonged artificial restoration significantly enhanced plant species diversity and soil nutrient content in the Shuanglonggou gangue area, providing a scientific basis for ecosystem restoration in abandoned mining regions.

Key words: artificial Hippophae rhamnoides forest, plant species diversity, soil nutrient, ecological restoration