森林工程2025，Vol.41Issue(3)：462-470,9.DOI:10.7525/j.issn.1006-8023.2025.03.003
外源有机碳输入对林地土壤有机碳矿化的影响
Effects of Exogenous Organic Carbon Input on Soil Organic Carbon Mineralization in Plantation
摘要
Abstract
Plant residues are an important source of forest soil carbon pool,and changes in soil carbon flux in woodland are closely related to soil carbon pool and carbon cycle.However,current studies on soil organic carbon stability mainly focus on farmland soil.In order to clarify the influence of exogenous carbon input changes on the stability of soil organic carbon,an indoor constant temperature culture experiment was set to study the litter species(Cherry,YH;Sycamore,WT;Poplar,YS),additive amount(0,2%,4%and 6%),particle size(2 mm,D;0.25mm,X)as variables,18 dif-ferent treatments and 2 controls were concluded.The changes of soil CO2 release,soil organic carbon content and miner-alization intensity under different factors and their interactions were analyzed.Results showed that different litters had significant effects on soil total CO2 release,and cherry blossom and poplar were more likely to promote soil total organic carbon mineralization.The highest total CO2 release rate was observed in YHX6 treatment,and the cumulative total CO2 release of YHD6 treatment was 4.37 times that of CK1.Compared with CK1,the potential mineralizable organic carbon Cp value of 6%added dose was significantly increased.The dynamic changes of soil total organic carbon accumulation mineralization over time can be fitted by the first-order kinetic equation,and the fitting results showed that exogenous carbon input accelerated soil carbon turnover,while litters in small particle size,6%addition amount and YH type yielded the highest total soil organic carbon turnover rate.WTX2 significantly decreased total organic carbon mineraliza-tion intensity,which was only 1.67%.Organic carbon intensity in soil with small particle size was lower than that of large particle size treatment.Therefore,sycamore leaves in small particle size and added with low addition amount can be applied to increase the stability of soil organic carbon and promote the retention of carbon in soil in regional soil or-ganic carbon management.关键词
土壤有机碳/外源碳输入/活性有机碳/有机碳矿化/植物凋落物/土壤碳固持Key words
Soil organic carbon/exogenous carbon input/active organic carbon/organic carbon mineralization/plant litter/soil carbon retention分类
农业科学引用本文复制引用
曹萌萌,朱利霞,赵欣,王桂端,肖梦杰,王嘉嘉..外源有机碳输入对林地土壤有机碳矿化的影响[J].森林工程,2025,41(3):462-470,9.基金项目
国家自然科学基金项目(32201414) （32201414）
省部共建国家重点实验室开放基金项目(SKL2023KF08). （SKL2023KF08）
