中国水稻科学Issue(2)：181-190,10.DOI:10.3969/j.issn.1001-7216.2015.02.010
秸秆还田条件下不同水分管理对双季稻田综合温室效应的影响
Effects of Water Regime on Yield-scaled Global Warming Potential Under Double Rice-Cropping System With Straw Returning
摘要
Abstract
This study provided an insight into a complete green house gases (GHG)accounting of global warming potential(GWP)as affected by water regime in typical double rice-cropping system with crop residue returning.The three water treatments included continuous flooding (F),flooding-midseason drainage-reflooding (F-D-F)and flooding-midseason drainage-reflooding-moist intermittent irrigation (F-D-F-M)in rice growing seasons.Methane and N2 O fluxes were measured using static chamber method.The results showed that annual CH 4 emissions ranged from 208.3 kg/hm2 for the F-D-F-M plots to 678.2 kg/hm2 for the F plots,being 60.6%-71 .7% from late-rice season.The CH 4 emission was significantly reduced by midseason drainage and intermittent irrigation in comparison with continuous flooding.Annual N2 O emission was 4.75 -8.1 9 kg/hm2 in the double rice-cropping system.Compared with the F plots, the N2 O emission slightly reduced in the F-D-F plots,while it was remarkably increased in the F-D-F-M plots.Among treatments,the grain yields of early-rice and late-rice were 7.76-8.02 t/hm2 and 7.22 -8.69 t/hm2 ,respectively.The GWP ranged from 7648.8 kg/hm2 for the F-D-F-M plots to 18471 .8 kg/hm2 for the F plots in double rice-cropping system with crop residue returning.The GWP ranged from 0.48 kg/kg to 1 .12 kg/kg,significantly reduced for the F-D-F and F-D-F-M plots as compared to F plots.Therefore,agricultural economic viability and GHGs mitigation can be simultaneously achieved by midseason drainage and intermittent irrigation instead of continuous waterlogging in the double rice-cropping system with crop residue returing.关键词
水分管理/甲烷/氧化亚氮/综合温室效应/稻田Key words
water regime/methane/nitrous oxide/GWP/rice paddy分类
农业科技引用本文复制引用
商庆银,杨秀霞,成臣,罗亢,黄山,石庆华,潘晓华,曾勇军..秸秆还田条件下不同水分管理对双季稻田综合温室效应的影响[J].中国水稻科学,2015,(2):181-190,10.基金项目
国家科技支撑计划资助项目(2012BAD14B14) （2012BAD14B14）
江西省教育厅青年科学基金资助项目(GJJ14306) （GJJ14306）
江西省高等学校科技落地计划资助项目(12063) （12063）
江西省科技计划资助项目(20132BAB214021) （20132BAB214021）
江西省博士后科研资助项目 （）
