稻麦两熟制农田不同土壤耕作方式对稻季CH4排放的影响.pdf

中国农业科学2010,43(16):3357-3366
ScientiaAgriculturaSinicadoi:10.3864/j.issn.0578-1752.2010.16.011

稻麦两熟制农田不同土壤耕作方式对稻季CH4排放的影响

张岳芳，郑建初，陈留根，王子臣，朱普平，盛婧，王亚雷

（江苏省农业科学院农业资源与环境研究所，南京210014）

摘要：【目的】研究稻麦两熟制农田不同土壤耕作方式对水稻生长季CH4排放的影响，为长江下游稻麦两熟制
农田温室气体减排提供对策。【方法】采用裂区设计，利用静态暗箱-气相色谱法研究麦季土壤耕作方式(免耕、旋

耕和翻耕)和稻季土壤耕作方式(旋耕和翻耕)对水稻生长季CH4排放的影响。【结果】稻麦两熟制农田不同土壤耕作

方式下水稻生长季CH4排放呈先升高后降低的变化趋势，移栽至有效分蘖临界叶龄期CH4累积排放量占全生育期排

放总量的比例为64.73%—86.84%。水稻生长季CH4排放总量麦季免耕极显著高于麦季旋耕和麦季翻耕，平均增加

53%和24%；稻季翻耕较稻季旋耕平均增加CH4排放量10%，差异达显著水平。不同土壤耕作处理稻季CH4排放总量
为：麦季免耕+稻季翻耕＞麦季免耕+稻季旋耕＞麦季翻耕+稻季翻耕＞麦季翻耕+稻季旋耕＞麦季旋耕+稻季翻耕＞

麦季旋耕+稻季旋耕，“单位产量的CH4排放量”表现趋势相同。水稻生长期内CH4排放通量的季节变化和土壤Eh

呈极显著负相关，CH4排放总量与0—5cm耕层土壤有机质含量呈极显著正相关。【结论】麦季土壤耕作方式和稻

季土壤耕作方式对水稻生长季CH4排放总量有显著或极显著影响，在长江下游稻麦两熟制农田采用周年旋耕措施能

有效减少水稻生长季CH4的排放。

关键词：稻麦两熟；土壤耕作；CH4排放

EffectsofSoilTillageonCH4EmissionDuringPaddySeason
inaRice-WheatDoubleCroppingSystem

ZHANGYue-fang,ZHENGJian-chu,CHENLiu-gen,WANGZi-chen,ZHUPu-ping,SHENGJing,WANGYa-lei

(InstituteofAgriculturalResourcesandEnvironments,JiangsuAcademyofAgriculturalSciences,Nanjing210014)

Abstract:【Objective】CH4emissionduringpaddyseasonunderdifferentsoiltillagesinarice-wheatdoublecroppingsystem
wereinvestigatedforprovidingscientificinstructionstodeveloprationalmeasuresofreducinggreenhousegasemissioninthelower
reachesoftheYangtzeRiver.【Method】Asplitplotexperimentwasconductedtostudytheeffectsofsoiltillagebeforewheat

sowingandsoiltillagebeforericetransplantingonCH4emissionduringpaddyseasonbyusingthemethodofstaticchamber-gas
chromatographictechniques.Soiltillagebeforewheatsowingwasdesignedasnotillagebeforewheatsowing(NTW),rotarytillage
beforewheatsowing(RTW)andplowtillagebeforewheatsowing(PTW).Soiltillagebeforericetransplantingwasdesignedas
rotarytillagebeforericetransplanting(RTR)andplowtillagebeforericetransplanting(PTR)foreachsoiltillagebeforewheat

sowingjustbeforericetransplanting.【Result】TheseasonalvariationcharacteristicsofCH4emissionunderdifferentsoiltillagesin

arice-wheatdoublecroppingsystemweredefined,andrepresentedaninc