| 摘要: |
| 目的 草地是我国最大的陆地生态系统类型，草地的退化及恢复问题一直以来受到广泛关注，其中补播是一种常见的退化草地生态系统的恢复措施。研究不同补播模式对植被群落和土壤养分特征恢复的影响，以期为草地补播措施的应用提供科学依据。方法 文章通过Meta分析的方法，从数据库中收集整理了70篇关于不同补播模式对草原恢复影响的文献用于Meta分析，共1 079组对比数据，将其分为补播草种、补播草原类型和恢复时间3个亚组，分析补播前后植被地上生物量、土壤有机碳、全氮等指标的变化。结果 补播能够促进植被群落的恢复。单播能够促进土壤有机碳和全氮的恢复，混播时土壤碳氮磷养分能够得到显著的恢复；补播后高寒草地和典型草原的土壤有机碳和全氮等的恢复效果更好；补播后不同持续时间对草原恢复的效果还有待进一步的探究。结论 补播可以促进退化草原的恢复。补播可以恢复草原的植被群落，增加土壤碳、氮、磷含量，而退化草原类型、补播草种和恢复时间均会对恢复效果产生影响，相关影响机制及关键阈值等应进一步探索，今后在恢复实践中要充分考虑这些因素。 |
| 关键词: 退化草原 草地修复 补播 Meta分析 |
| DOI：10.7621/cjarrp.1005-9121.20250522 |
| 分类号:S127 |
| 基金项目:重点研发计划课题“呼伦贝尔典型草原近自然修复和生态质量综合提升技术研发与示范”(2023YFF1304102)；中国农业科学院中央级公益性科研院所基本科研业务费专项资金资助项目(CAAS-ZDRW202417, G2024-01-02) |
|
| EFFECTS of RESEEDING ON DEGRADED GRASSLAND: A META-ANALYSIS |
|
Bao Yufan1,2, Luo Yuhong1,2, Li Le1,2, Liu Jiahui1,2, Xu Nuo1,2, Bai Keyu1,2, Cheng Yanbin3, Yan Yuchun1,2
|
|
1.State Key Laboratory of Efficient Utilization of Arable Land in China, Beijing 100081, China;2.Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;3.Hulun Buir Agricultural Reclamation Xieertala Farm Co., Ltd., Hulun Buir 021012, Inner Mongolia, China
|
| Abstract: |
| Grassland is the largest terrestrial ecosystem type in China, and the degradation and restoration of grassland have been widely concerned. Among them, reseeding is a common restoration measure for degraded grassland ecosystems. This research aims to study the effects of different reseeding modes on the restoration of vegetation community and soil nutrient characteristics, in order to provide scientific basis for the application of grassland reseeding measures. 70 publications on the impact of different reseeding modes on grassland restoration from a database were collected and organized through Meta-analysis. And a total of 1 079 sets of comparative data were divided into three subgroups: reseeding grass species, reseeding grassland types, and restoration time. The changes in vegetation above-ground biomass, soil organic carbon, total nitrogen, and other indicators before and after reseeding were analyzed. The results were showed as follows. Reseeding promoted the restoration of vegetation community. Sowing one species promoted the recovery of soil organic carbon and total nitrogen, while mixed sowing significantly restored soil carbon, nitrogen, and phosphorus nutrients; The restoration effect of soil organic carbon and total nitrogen in alpine grasslands and typical grasslands was better after reseeding; The effect of different durations of reseeding on grassland restoration still needed further exploration. In summary, reseeding can promote the restoration of degraded grasslands, and also can restore the vegetation community of grasslands, increase soil carbon, nitrogen, and phosphorus content, while degraded grassland types, reseeding grass species, and restoration time all had an impact on the restoration effect. The relevant impact mechanisms and key thresholds should be further explored, and these factors should be fully considered in future restoration practices. |
| Key words: degraded grassland grassland restoration reseed Meta-analysis |
