中国生态农业学报（中英文）2025，Vol.33Issue(5)：883-894,12.DOI:10.12357/cjea.20240807
夏闲期耕作对旱地麦田土壤有机碳固持和矿化的短期效应
The short-term effects of tillage during the summer fallow period on soil organic carbon sequestration and mineralization in dryland wheat field
摘要
Abstract
As an important element of anthropogenic soil management practices,tillage typically influences soil organic carbon(SOC)turnover by altering soil physical and chemical properties or directly manipulating the distribution of crop residues within soil.With a specific focus on the dryland wheat fields on the Loess Plateau,in this study,we conducted a field experiment from 2018 to 2020,in which we adopted a single-factor completely randomized block design,and established the following three tillage patterns during the summer fallow period:no tillage,deep plowing and subsoiling.Soil samples were collected from the 0-50 cm soil layers following the dryland wheat harvest in June 2020,and we analyzed the accumulation and mineralization of SOC and the relationships with physicochemical properties under different summer fallow tillage patterns.The results revealed that at soil depth of 0-10 cm,there were significantly higher SOC stock(SOCstock),SOC sequestration(ΔSOCstock),SOC sequestration rate(SOCstock-rate)and SOC se-questration efficiency(SOCstock-efficiency)in soils under the no tillage treatment,which would be advantageous with respect to SOC se-questration within the surface soil.Within the 0-50 cm soil profile,compared with the no tillage treatment,the deep plowing and sub-soiling treatments contributed to significant increases of 9.90％-10.40％in SOCstock,as well as ΔSOCstockand SOCstock-rate,although there were no significant differences detected between the deep plowing and subsoiling treatments.Moreover,the regression fitting results revealed that SOCstock-rate initially increased and subsequently declined in response to an increase in carbon input from exogen-ous residues.Following 40 days of laboratory incubation,the significantly highest cumulative mineralization of SOC was observed within the 0-30 cm soil layer under deep plowing treatment and within the 30-50 cm soil layer under subsoiling treatment,and we found that the potentially mineralizable carbon was essentially consistent with the cumulative mineralization of SOC.With respect to SOC mineralization rate,we observed the trend of deep plowing＞no tillage＞subsoiling within the 0-30 cm soil layer,and com-pared with the subsoiling and no tillage treatments,levels of mineralization rate were found to be significantly lower in the 30-50 cm soil layer under deep plowing treatment.Furthermore,on the basis of redundancy analysis,we identified the soil available nitrogen(AN)content,pH,and soil available phosphorus(AP)content as key factors contributing to differences in the accumulation and min-eralization of SOC in soil subjected to different tillage treatments,notably the significant relationships between AN content and each of these tillage practices.Overall,under the assessed experimental conditions,the no tillage pattern was established to have signific-ant short-term advantages with respect to carbon sequestration in the surface soil.On the basis of the observed effects on SOC se-questration and mineralization,an subsoiling tillage pattern is recommended as a measure for promoting carbon sequestration within the 0-50 cm soil layer of dryland wheat fields on the Loess Plateau,China.关键词
土壤有机碳/固持和矿化/土壤理化性质/夏闲期耕作Key words
soil organic carbon/sequestration and mineralization/soil physical and chemical properties/tillage during summer fal-low period分类
农业科学引用本文复制引用
张慧芋,翟浩,昝瑞新,田园,赵文欣,高志强..夏闲期耕作对旱地麦田土壤有机碳固持和矿化的短期效应[J].中国生态农业学报（中英文）,2025,33(5):883-894,12.基金项目
山西省基础研究计划项目(202203021212424)、山西省博士研究生来晋工作奖励经费科研项目(SXBYKY2022110)、山西农业大学"引进人才科研启动工程"项目(2023BQ39)和国家小麦产业技术体系(CARS-03-53)资助 This study was supported by the Fundamental Research Program of Shanxi Province(202203021212424),the Doctoral Working Award Fund Project of Shanxi Province(SXBYKY2022110),the Start-Up Project for Introduction of Talent of Shanxi Agricultural University(2023BQ39),and the Na-tional Wheat Industry Technology System Project of China(CARS-03-53). （202203021212424）
