土壤与作物2025，Vol.14Issue(1)：53-63,11.DOI:10.11689/sc.2024063001
耕作方式与秸秆还田量对黑土有机碳组分和肥力指数的影响
Characteristics of active carbon fractions and fertility index of black soil under different soil tillage and straw returning amount
摘要
Abstract
Soil active organic carbon(AOC)is a critical component of soil organic carbon(SOC).Although it accounts for a small proportion of SOC,it is susceptible to soil management practices and changes rapidly,making it an important indicator for assessing soil quality dynamics.This study was based on an 8-year field experiment at the Hailun Station,involving different tillage methods and straw return treatments.It systematically explored the effects of tillage practices and straw return rates on the contents and efficiencies of active carbon fractions,as well as their influence on the carbon pool activity and comprehensive fertility of black soil.Soil fertility and carbon pool quality were evaluated using the Integrated Fertility Index(IFI)and Carbon Pool Management Index(CPMI).The results show that,compared to the CTS0 treatment(conventional tillage at 20 cm depth with no straw return),all treatments with varying tillage practices and straw return rates significantly increase the contents and efficiencies of SOC,total nitrogen(TN),dissolved organic carbon(DOC),and microbial biomass carbon(MBC)(P<0.05).Among these treatments,CTS2(conventional tillage at 20 cm depth with full straw return at 10 t·hm-2)demonstrates the most pronounced effect on improving soil fertility,increasing SOC and TN contents by 13.7%and 18.9%,respectively,and raising the IFI value by 7.7%.The CTSA treat-ment(conventional tillage at 20 cm depth with full straw return at 10 t·hm-2 after straw burning)results in a 12.3%increase in SOC content,with significant increases of 18.9%in DOC and 31.6%in MBC contents,along with a 12.5%improvement in CPMI.Additionally,IFI shows significant positive correlations with SOC,TN,available phosphorus(AP),available potassium(AK),DOC,and MBC(P<0.05).Similarly,CPMI is significantly positively correlated with DOC,MBC,and easily oxidizable organic carbon(P<0.05),indicating that the enhancement of active carbon fractions directly influences soil carbon pool stability and manage-ment outcomes.关键词
活性碳组分/综合肥力指数/碳库管理指数/秸秆还田/农田黑土Key words
active carbon fraction/integrated fertility index/carbon pool management index/straw returning/arable black soil分类
农业科学引用本文复制引用
盛明,李佳垚,雷琬莹,滕培基,李娜..耕作方式与秸秆还田量对黑土有机碳组分和肥力指数的影响[J].土壤与作物,2025,14(1):53-63,11.基金项目
吉林省自然科学基金项目(YDZJ202201ZYTS517) （YDZJ202201ZYTS517）
中国科学院战略性先导科技专项子课题(XDA28010301) （XDA28010301）
国家自然科学基金项目(42277355,U23A6001) （42277355,U23A6001）
国家重点研发计划项目(2021YFD1500105-1) （2021YFD1500105-1）
中国科学院前沿科学研究重点计划项目(ZDBS-LY-DQC017). （ZDBS-LY-DQC017）
