生态环境学报Issue(6)：1022-1027,6.DOI:10.16258/j.cnki.1674-5906.2015.06.017
不同栽培技术对稻季CH4和N2O排放的影响
Effect of Different Cultivation Techniques on CH4 and N2O Emissions in Paddy Season
摘要
Abstract
A field experiment was conducted in 2014 to investigate the effects of different cultivation techniques on CH4 and N2O emissions in paddy season in a wheat-rice double cropping system by using the method of static chamber-gas chromatographic techniques. The rice cultivar of Su 101 was field-grown. Three treatments such as super high production technology (SP), conventional production technology (CP), and reducing fertilizer of production technology were conducted (RP). The results showed that, (1) The characteristics seasonal variations of CH4 emissions initially increased, but it eventually declined in the rice growth season under different cultivation techniques. Peak CH4 flux was during the early growth stage of rice, CH4cumulative emission from transplanting to the critical stage of productive tillering accounted for 79.1%~84.5% of the total emission during the rice growth season. Peak N2O flux was only observed during midseason drainage period. (2) Total CH4 and N2O emissions during rice growth season were significantly affected by different cultivation techniques. The order of total CH4 emissions under different cultivation techniques was SP (423.68 kg·hm-2) > RP (407.51 kg·hm-2) > CP (195.96 kg·hm-2), and the order of total N2O emissions was CP (3.88 kg·hm-2) > SP (2.96 kg·hm-2) > RP (2.72 kg·hm-2). (3) Combined global warming potential (GWP) of CH4 and N2O under SP was 11473.6 kg·hm-2 calculated as CO2, significantly higher than CP and RP. SP increased GWP by 89% and 4.3% respectively compared with CP (6055.7 kg·hm-2) and RP (10998.4 kg·hm-2) calculated also as CO2. (4) SP significantly increased rice yield at the same time intensified greenhouse effects during rice growth season in the Taihu lake region, but the GWP of per unit rice yield under SP was lower than RP.关键词
不同栽培技术/稻田/CH4/N2O/增温潜势Key words
different cultivation techniques/paddy field/CH4/N2O/global warming potential分类
资源环境引用本文复制引用
刘红江,郭智,郑建初,陈留根,张岳芳,周炜..不同栽培技术对稻季CH4和N2O排放的影响[J].生态环境学报,2015,(6):1022-1027,6.基金项目
国家科技支撑计划项目（2012BAD14B12）；江苏省农业科技自主创新资金项目[编号CX(14)2050] （14）
