农业资源与环境学报2017，Vol.34Issue(2)：145-152,8.DOI:10.13254/j.jare.2016.0236
稻草还田下非稻季持续淹水对稻季CH4和CO2排放的影响
Effects of Continuous Flooding in No-rice Growing Season on CH4 and CO2 Emissions of Rice Growing Season with Straw Returning
摘要
Abstract
Straw returning is a straw utilization pattern which is widely promoted in China. It can increase the soil organic carbon and fertility, but straw returning also increase the CH4 and CO2 emissions. The effects of continuous flooding in no rice growing season on CH4 and CO2 e-mission in rice season with straw returning is not clear. This study was conducted with two different water managements in no rice growing season, one was the middle rice- natural drainage(RD)and another was the middle rice- continuous flooding(RW). The aim was to inves-tigate the characteristic of CH4 and CO2 emission flux in rice season under different water management with straw returning, and to provide da-ta support for accurate assessment of paddy greenhouse gas emissions. The results showed that RD significantly reduced the CH4 accumulation emission flux in rice growing season compared with the RW, and 80%total CH4 emission flux in rice growing season was emission before the first drainage whether RD or RW. RW could cutdown the CO2 accumulation emission flux in rice growing season compared with RD, and about 60%total CO2 emission flux in rice growing season was emission after the first drainage whether RD or RW. RW reduced the soil NO-3- N, NH+4-N and DOC concentration in rice growing season, and decreased the Eh value at 10 cm soil layer, but increased the acetic acid concen-tration. This might be the main reason of increasing the CH4 accumulation emission flux from RD.关键词
稻草还田/持续淹水/甲烷/二氧化碳Key words
straw returning/continuous flooding/methane/carbon dioxide分类
资源环境引用本文复制引用
徐祥玉,张敏敏,彭成林,佀国涵,徐大兵,袁家富..稻草还田下非稻季持续淹水对稻季CH4和CO2排放的影响[J].农业资源与环境学报,2017,34(2):145-152,8.基金项目
国家自然科学基金项目(41301306) （41301306）
湖北省农业科学院竞争性项目(2016jzxjh008) （2016jzxjh008）
湖北省农业科技创新项目(2016-620-000-001-020) （2016-620-000-001-020）
国家科技支撑计划课题(2013BAD07B10) （2013BAD07B10）
