小麦秸秆集中还田配施腐秆剂对稻麦系统温室气体排放的影响

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中图分类号：X71；S141.4 文献标志码：A 文章编号：1672-2043（2025）06-1658-09 doi：10.11654/jaes.2024-0701

Effects of concentrated wheat straw returncombined with decomposing agents on greenhouse gas emisions in arice-wheatsystem

LI Ruolin12，WANGShichen12，JINPenghui1，2，ZHANG Guangbin12，MAJing1，ZHUZhenke³，YANZhiying4，XUHua1 （1.StateKeyLaboratoryofSlandSustainableAgriculture，IstituteofSolSence，CneseAadeyofSiences，Naning0008， China;2.UniversityfCineseAcadeyofSienes，Beijing49，China;3.StateKeyLaboratoryforanagingBioticandCmical ThreatstotheQualitydSafetyofgoprodcts，stituteoflantVirogngboUivesityingbo5ina;4d Institute of Biology， Chinese Academy of Sciences， Chengdu 610o41， China）

Abstract：ImproperstrawreturnsignificantlyincreasesmethaneCH4）emisionsinricepaddies.TomitigateCH4emissions，thisstudy proposesanovelstraweturnmethodforthericeseason：concentratedstrawreturncombinedwiththeapplicationofdecomposingagents. Theexperimentincludedthretreatmentsconventionalevenlystrawretun（CK），strawconcentratedreturnattwicethamountwith decomposingagents（S2），andstrawconcentratedreturnatfour timestheamount withdecomposingagents（S4）.Staticchamber-gas chromatography was used to monitor CH4 and N2O fluxes in the rice-wheat rotation system（2022—2O23），alongside measurements of soil properties，igotidctetialE）oldicDO）g（dte （NO3-N）.The results showed that the CK exhibited annual CH4 and N2O emissions of 120.1kg⋅hm-2 and 5.08 kg·hm-²（calculated by N）， respectively. Compared to CK，S2 and S4 significantly reduced CH4 emissions by 41% and 28% during the rice season， while increased N2O emissions by 10% and 26% ，respectively.During the wheat season，alltreatments exhibited CH4 uptake，and no significant differences wereobservedinNOemisss.ThignificanrducioinCHemissiosduringtheiceseasoninS2nd4fsetthearigeffctf the increased N2O emissions， resulting in a 25% and 12% significant reduction in total annual greenhouse gas emissions compared to CK， respectively.Terewerenosigniicantdierenesincropields（ice：.O5.59theat：318-3.24t）aogthetrats， andasaresult，theannual greenhousegasemissonintensityof S2and S4 wassignificantlylowerthanthatofCK.Inconclusion， concentrated strawretuncombinedwith decomposingagents duringthericeseasoncansignificantlyreducegreenhousegasemisions without decreasing rice and wheat yields.

Keywords： rice-wheat rotation; straw return; decomposing agents; greenhouse gas; yield

巴黎协定规定温室气体（GHG）排放量必须在2050年前降至净零（IPCC，2021）。（剩余17790字）