水土保持学报2025，Vol.39Issue(4)：31-38,47,9.DOI:10.13870/j.cnki.stbcxb.2025.04.006
毛乌素沙地固沙林恢复土壤矿物颗粒结合态无机碳固存效应
Restoration of Soil Mineral Particle-Bound Inorganic Carbon Sequestration Effect by Sand-Fixing Forestin Mu Us Sandy Land
摘要
Abstract
[Objective]This study aims to reveal the soil inorganic carbon sequestration effects and the environmental impact mechanisms during the vegetation restoration process in desertified lands.[Methods]Shrub and tree sand-fixing forests from semi-fixed sandy land(0 a)to vegetation restoration of 24-56 a in the Hongshixia experimental forest farm of Yulin Mu Us Sandy Land were selected.The evolution characteristics of total inorganic carbon,water-soluble inorganic carbon,and inorganic carbon components in the 0-10 and 10-20 cm soil layers,as well as sand,silt and clay-bound inorganic carbon components,were quantified.Meanwhile,the relationships between the evolution of inorganic carbon component pools and vegetation and soil physicochemical properties were analyzed.[Results]As the restoration time of sand fixation forest prolonged,the contents of total inorganic carbon and its components in the soil of both types of sand fixation forest showed an increasing trend.Moreover,in both soil layers,the accumulation rates of mineral particle-bound inorganic carbon were relatively high.In the 0-20 cm soil layer of shrub land and arbor land,the carbon fixation rate reached 0.13 and 0.17 g/(m2·a),which were on average 5.0,1.2 and 7.0 times higher than the accumulation rates of water-soluble inorganic carbon and sand particles and clay particles,respectively.When the vegetation was restored for 56 years,total inorganic carbon contents in the 0-10 cm soil layer of the arbor land and shrub land were 12.4 and 17.9 times greater than that of semi-fixed land,with increments 1.4-1.8 times those of the 10-20 cm soil layer.Meanwhile,the proportions of inorganic carbon in different soil components were ranked as silt-bound carbon>sand-bound carbon>water-soluble carbon>clay-bound carbon.Further RDA and correlation analyses indicated that changes in litter mass,soil bulk density,and Ca2+concentration were key factors promoting the sequestration of soil inorganic carbon and its components.[Conclusion]The improvement of environmental factors during sand-fixing forest restoration can significantly promote the increase of total inorganic carbon and mineral particle-bound inorganic carbon,with silt-bound carbon being the primary form of inorganic carbon fixation.This may be one of the important mechanisms for reversing accumulation of inorganic carbon in the soil during desertification.关键词
土壤无机碳/土壤颗粒/植被重建/固碳Key words
soil inorganic carbon/soil particles/vegetation restoration/carbon sequestration分类
农业科技引用本文复制引用
刘玥婷,郭雯娴,廖东亮,谢贇,马艳霞,刘洋,佟小刚..毛乌素沙地固沙林恢复土壤矿物颗粒结合态无机碳固存效应[J].水土保持学报,2025,39(4):31-38,47,9.基金项目
陕西省自然科学基金项目(2023-JC-ZD-10) （2023-JC-ZD-10）
大唐杨凌热电有限公司光伏治沙科技项目(2023-ZH-054) （2023-ZH-054）
国家自然科学基金面上项目(42477324) （42477324）
