期刊论文

Effects of Controlled-release Urea Reduction on CH_4 and N_2O Emissions and Its Economic Benefits in Double Cropping Paddy Fields

中文

生态环境学报

1674-5906

2019

28

11

2223-2230

10.16258/j.cnki.1674-5906.2019.11.011

国家重点研发计划项目(2017YFD0200703) 湖南省自然科学基金项目(2019JJ50233) 湖南省教育厅平台项目(16K040) 湖南农业大学“双一流”建设项目(SYL201802004)。

本校为第一机构

通过控释尿素(CRU)替代普通尿素(CU),是实现农业生产化肥“减施增效”及其使用量零增长目标的有效途径之一。选取环洞庭湖典型双季稻(Oriza sativa L.)连作区,设置100%氮CU(农民习惯施肥方式,CU)、100%氮CRU(1.0CRU)、减氮10% CRU(0.9CRU)、减氮20% CRU(0.8CRU)和减氮30% CRU(0.7CRU)共5个处理,通过静态暗箱采气、气相色谱法检测,研究CRU减氮施用对双季稻田CH_4、N_2O排放及稻作经济效益的影响。结果表明:减氮10%—30% CRU处理早稻的CH_4、N_2O排放总量和全球增温潜势(GWP)比CU处理分别减排18.8%—28.7%、15.7%—28.6%、18.4%—28.7%,晚稻的分别减排27.1%—39.5、17.5%—25.0%、25.5%—37.1%;与...

For reducing chemical fertilizer application with increasing fertilizer efficiency and the zero growth of fertilizer usage, it could be an effective way to replace ordinary urea (CU) by controlled-release urea (CRU). In this study, a field experiment was conducted in the representative double cropping paddy fields of Dongtinghu lake area, with six treatments including CU, 100% nitrogen (N) of controlled release urea (1.0CRU), N reduction 10% of controlled release urea (0.9CRU), N reduction 20% of controlled release urea (0.8CRU), and N reductio...