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1、圆园15，34（3）:599-605农业环境科学学报2015年3月允燥怎则灶葬造燥枣粤早则燥鄄耘灶增蚤则燥灶皂藻灶贼杂糟蚤藻灶糟藻早稻灌浆乳熟期蓄水灌溉对产量及温室气体排放的影响傅志强，龙攀，刘依依，谢天洋，龙文飞，钟娟（湖南农业大学农学院，长沙410128）摘要：为给湖南双季稻区稻田蓄水采用“早水晚用”的节水栽培模式提供理论依据，于早稻灌浆乳熟期起保持稻田不同的灌水深度（10、15、20cm），通过大田试验探讨不同灌水深度对早稻产量及温室气体排放的影响。结果表明：与常规水管理相比，灌深水有利于提高光合速率，但降低了结实率
2、和千粒重，使产量减少3.1%~5.7%，但差异不显著；灌深水增加了62.7%~113.6%的CH4累积排放量，减少了63.1%~84.1%的N2O累积排放量，差异显著。各灌水处理中以灌水深10cm增排量最高，随着灌水深度增加增温潜势降低，各灌水处理的增温潜势超出常规水管理57.2%~96.6%。根据湖南降雨季节分布规律，加高加固田埂后，早稻成熟期蓄积20cm深水有利于双季稻区晚稻种植和节水。但蓄深水增加了CH4排放，对此有待进一步深入研究减排措施。关键词：早稻；蓄水深度；产量；温室气体中图分类号：X16文献标志码：A文章编
3、号：1672-2043（2015）03-0599-07doi:10.11654/jaes.2015.03.025RiceYieldsandGreenhouseGasEmissionsasInfluencedbyStandingWaterDepthsatMilkingStageofEarlyRiceFUZhi-qiang,LONGPan,LIUYi-yi,XIETian-yang,LONGWen-fei,ZHONGJuan（AgronomyCollegeofHunanAgriculturalUniversity,Changs
4、ha410128,China）Abstract：Ricefieldscontributesubstantiallytogreenhousegasemissions,andwatermanagementsaffectthiscontribution.Inthisstudy,afieldexperimentwasdesignedtoexaminetheeffectsofirrigationwateronyieldsandgreenhousegasemissionsbykeepingdifferentdepthsofstandi
5、ngwater（10cm,15cm,and20cm）inpaddyfieldfrommilkingtomaturitystageofearlyrice.Comparedtotraditionalwaterregime（CK）,deepstandingwaterimprovedplantphotosyntheticrate,butreducedseedsettingrateand1000-grainweight,resultingin3.1%~5.7%reductionofriceyieldswithnosignifican
6、tdifference.However,deepstandingwatertreatmentsincreasedthecumulativeCH4emissionby62.7%~113.6%,butdecreasedthecumulativeN2Oemissionby63.1%~84.1%,comparedtothecontrol.Significantdifferenceswerefoundamongthetreatments.Theglobalwarmingpotential（GWP）ofCH4andN2Owasfoun
7、dtobethehighestinthe10cmdepthofstandingwater.Thedeeperthestandingwater,thelowerGWPswereobserved.Overall,theGWPwas57.2%~96.6%higherindeepstand原ingwaterthaninCK.Inconclusion,holding20cmdepthwaterinearlyricefieldwouldbenefitlatericecultivationinthedouble-seasonricear
8、eaofHunanProvince.FurtherstudyisnecessaryonreducingCH4emissionfromdeepstandingwaterpaddyfield.Keywords：earlyrice;deepstandingwater;yields;greenhousegase
