安徽农业科学Issue(6)：3487-3489,3.
测定时间对黑土区CO2和N2O排放通量的影响
Effect of Measurement Time on Emission Flux of CO2 and N2O in Black Soil Region
摘要
Abstract
[Objective] The aim was to investigate and discuss effect of measurement time on emission flux of CO2 and N2O to ensure the optimum time of emission flux, in order to provide scientific reference for emission reduction of greenhouse gas in black soil region. [Method] Based on experiment of long - term fertilizer location in black soil region, the paper studied on daily dynamic variation of CO2 and N2O discharge in 3 key growth periods (booting stage, grain - filling stage and mature stage) to reveal differences of CO2 and N2O emission flux in different times. [ Result ] Daily variations of CO2 and N2O emission flux were large, from 205 mg/ (m2·h) to 552 mg/ (m2· h) h for CO2 and from 51 μg/(m2· h) to 295 u,g/(m2·h) for N2O. Trend of CO2 discharge in different growth times showed a unimodal curve, and the peak was at noon of 12:00 and the peak valley was at 3:00 am; discharge of N2O was small in day time at booting stage and large at night. Regardless of rice growth period effect on CO, and N2O emission flux, representative time of CO2 discharge was 6:00 -8:00 or 16:00 -21: 00; and time of N2O was 8:00 - 10:00 or 16:00 -21:00; if CO2 and N2O emission fluxes were measured simultaneously, the optimum time was 16:00 - 18:00; if the measurement was started during 9:00 - 12:00, correction coefficients of CO2 and N2O were 0.81 and 0. 90, respectively. [Conclusion] The result provided scientific reference for reduction of greenhouse gas emission in black soil region.关键词
CO2/N2O/黑土/测定时间Key words
CO2/N2O/ Black soil/ Measurement time分类
农业科技引用本文复制引用
乔云发,韩晓增,赵兰坡..测定时间对黑土区CO2和N2O排放通量的影响[J].安徽农业科学,2012,(6):3487-3489,3.基金项目
国家自然科学基金(41001138) （41001138）
国家科技支撑计划(2009BADB3 B04)资助. （2009BADB3 B04）
