Soil type-dependent effects of drying-wetting sequences on aggregates and their associated OC and N
作者机构：State Key Laboratory of Soil Erosion and Dryland Farming on the Loess PlateauInstitute of Soil and Water ConservationChinese Academy of Sciences and Ministry of Water ResourcesYangling712100China Institute of Soil and Water ConservationNorthwest A&F UniversityYangling712100China CAS Center for Excellence in Quaternary Science and Global ChangeXi'an710061China College of Resources and EnvironmentUniversity of Chinese Academy of SciencesBeijing100049China
出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)
年 卷 期：2022年第10卷第4期
页 面：649-661页
核心收录：
学科分类：082802[工学-农业水土工程] 090707[农学-水土保持与荒漠化防治] 0907[农学-林学] 08[工学] 0828[工学-农业工程] 09[农学] 0815[工学-水利工程]
基 金：funded by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA23070200 and XDB40000000) the National Natural Science Foundation of China(41622105 and 41977068) programs from Chinese Academy of Sciences(QYZDB-SSW-DQC039)
主 题：Aggregates Carbon Nitrogen Drying-wetting sequences Soil type
摘 要：Evaluating the impacts of drying-wetting(DW)cycles on soil aggregates and their associated organic carbon(OC)and nitrogen(N)is crucial to understand the OC and N *** are likely subjected to DW cycles with different sequences depending on seasons or in ***,studies on how DW sequences influence OC and N dynamics within aggregates,and whether this effect is dependent on soil type,are relatively ***,two DW sequences,i.e.,drying-wetting-dryingwetting(2DW)and wetting-drying-wetting-drying(2WD)treatments were designed,and a consistent wetting(CW)was set as a control to assess the effects of DW *** soils(Entisol,Ultisol,Anthrosol and Mollisol)varying in texture and OC content were *** aggregate size distribution,the OC,total N(TN),readily oxidizable OC(ROOC)and mineral N(Min-N)content in aggregates were *** showed that 2DW treatment increased but 2WD treatment decreased the large aggregates of Entisol and Ultisol,while 2DW and 2WD treatments synchronously increased the large aggregates of Anthrosol but decreased them of *** DW treatments increased the OC in each aggregate of Entisol,Anthrosol and Mollisol but decreased them of *** 2DW didn t affect but 2WD treatment decreased ROOC in 1e2 mm aggregates of Entisol and0.25 mm aggregates of Ultisol and *** 2DW and 2WD treatments minimally affected TN but potentially influenced Min-N in *** 2DW and 2WD treatments both decreased the Min-N in each aggregate size class of Entisol and Mollisol,while 2DW increased but 2WD treatment decreased Min-N in each aggregate of Ultisol and *** results indicated that the varied effects of DW sequences and the interactive effects of soil type with DW sequences on aggregate turnover and OC and N cycling should be reconsidered to provide more precisive evidences for global C and N cycles under the scenario of future climate changes.
维普期刊数据库