生态学报2023，Vol.43Issue(24)：10054-10064,11.DOI:10.20103/j.stxb.202306241340
黄土高原地区退耕还林后土壤有机碳储量变化特征及影响因素
Variation characteristics and influencing factors of soil organic carbon storage after returning farmland to forest on the Loess Plateau
摘要
Abstract
The carbon sequestration effect of soil organic carbon(SOC)and identification of the influencing factors are the core and frontier issues of current research.However,the retention of SOC after returning farmland to forests and the synergistic effect of various influencing factors are still unclear.The quantitative attribution based on climate,vegetation,soil,and other factors still needs to be strengthened.By collecting 117 papers about the influence of vegetation restoration on SOC storage after returning farmland to forests on the Loess Plateau from 1999 to 2022,1140 pairs of valid data were obtained,and the influence of vegetation restoration on SOC storage under different conditions(climate factors,vegetation factors,and soil factors)were analyzed.At the same time,the main driving factors affecting SOC storage of different vegetation restoration types and their interaction were identified and quantified through the modeling of geographic detector.The results showed that vegetation restoration could significantly increase SOC storage on the Loess Plateau,and the effect of forest land restoration on soil carbon sequestration was better than that of shrub land and grassland,which were significantly increased by36.21％,32.41％,and 15.57％,respectively.The effect of vegetation restoration on the SOC storage increased with the increases of vegetation restoration age and vegetation coverage,but decreased with the increase of soil depth.When soil bulk density was low(＜1g/cm-3),it was more likely to promote the increase of SOC storage.In addition,when mean annual temperature(MAT)was 7-10℃ and mean annual precipitation(MAP)was 450-550 mm,the restoration of forest land was more conducive to increasing SOC storage.When MAT was＜7℃ and MAP was 450-550 mm,the effect of shrub land on SOC storage was more significant,but it was limited by vegetation coverage.When MAT was＜7℃ and MAP was＞550 mum,the effect of grassland restoration on SOC storage increased significantly.The geographic detector model showed that vegetation restoration age,vegetation coverage,and MAP were main driving factors for SOC storage in forest land,shrub land,and grassland,respectively.In the aspect of increasing SOC storage,the interaction between various factors was better than that of single factor.Specifically,the interaction between MAP and vegetation restoration age made the most significant contribution to SOC storage of forest land,which was 33.46％.In shrub land,the interaction between MAT and soil bulk density contributed the most to SOC storage(86.77％).The interaction between MAP and vegetation coverage contributed the most to SOC storage of grassland(60.59％).It provides a reference for selecting reasonable vegetation allocation under different restoration conditions.关键词
土壤有机碳/植被恢复/Meta分析/驱动因素/定量评估Key words
soil organic carbon/vegetation restoration/meta-analysis/driving factors/quantitative assessment引用本文复制引用
衣鹏慧,吴会峰,胡保安,温馨,韩海荣,程小琴..黄土高原地区退耕还林后土壤有机碳储量变化特征及影响因素[J].生态学报,2023,43(24):10054-10064,11.基金项目
国家重点研发计划项目(2019YFA0607304) （2019YFA0607304）
