Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.
J Environ Manage. 2024 Nov;370:122530. doi: 10.1016/j.jenvman.2024.122530. Epub 2024 Sep 17.
Vegetation restoration measures have been increasingly employed to alleviate rocky desertification in karst ecosystems. However, the comprehensive effects of these interventions on soil properties and soil organic carbon (SOC) remain poorly understood. Herein, we gathered 644 paired observations from 68 studies and conducted a meta-analysis to quantify the performance of different vegetation restoration measures including moss (MS), grassland (GL), cash crop (CP), shrub (SH), and secondary forest (SF) through soil properties and SOC. Our results demonstrated significant effects of MS, GL, CP, SH, and SF on soil biotic and abiotic factors, each with distinct response characteristics. Particularly, MS significantly enhanced all soil properties (excluding a slight decrease in soil pH by 10.8%). Moreover, MS, GL, CP, SH, and SF could elevate SOC by 32.1%, 17.6%, 24.9%, 59.2%, and 48.7% respectively. Utilizing random forest and linear regression models, we identified primary drivers for SOC in MS, GL, CP, SH, and SF as soil moisture content, arbuscular mycorrhizal fungi, soil microbial phosphorus, total nitrogen, and β-1,4-glucosidase, respectively. This meta-analysis underlined the varied effects of vegetation restoration measures on soil properties and advocates for restoration measures that prioritize plant productivity and reduce soil temperature during the karst rocky desertification restoration process. Additionally, this study underscores the pivotal role of vegetation rehabilitation in environmental conservation and carbon sequestration of ecologically vulnerable regions.
植被恢复措施已被越来越多地应用于喀斯特生态系统中缓解石漠化。然而，这些干预措施对土壤性质和土壤有机碳（SOC）的综合影响仍知之甚少。在此，我们从 68 项研究中收集了 644 对观测值，并进行了荟萃分析，以量化不同植被恢复措施（包括苔藓（MS）、草地（GL）、经济作物（CP）、灌木（SH）和次生林（SF））通过土壤性质和 SOC 的表现。我们的结果表明，MS、GL、CP、SH 和 SF 对土壤生物和非生物因素都有显著影响，每个因素都有不同的响应特征。特别是，MS 显著提高了所有土壤性质（除了土壤 pH 值略有降低 10.8%）。此外，MS、GL、CP、SH 和 SF 分别可将 SOC 提高 32.1%、17.6%、24.9%、59.2%和 48.7%。利用随机森林和线性回归模型，我们确定了 MS、GL、CP、SH 和 SF 中 SOC 的主要驱动因素分别为土壤水分含量、丛枝菌根真菌、土壤微生物磷、总氮和β-1,4-葡糖苷酶。这项荟萃分析强调了植被恢复措施对土壤性质的不同影响，并主张在喀斯特石漠化恢复过程中优先考虑植物生产力和降低土壤温度的恢复措施。此外，本研究强调了植被恢复在脆弱生态地区的环境保护和碳固存中的关键作用。
