生态环境学报2017，Vol.26Issue(9)：1494-1500,7.DOI:10.16258/j.cnki.1674-5906.2017.09.006
控释肥与尿素配合施用对稻季土壤CH4和N2O排放的影响
Effect of Controlled-release Fertilizer and Its Combined Application with Urea on CH4 and N2O Emissions in Rice Soil
摘要
Abstract
By the method of static chamber, a field experiment was conducted to study the effects of controlled-release fertilizer and its combination with urea under different application rates (0, 80, 160 and 240 kg·hm-2) on CH4 and N2O emissions in rice soil, with the aim of identifying an optimal fertilization management pattern in rice paddy fields to mitigate the global warming potential. The results showed that, N2O emission and rice yield increased with increasing N application rate, while CH4 emission and global warming potential (GWP) of CH4 and N2O had no positive relationship with N rate. The effects of combined application of CRF and urea on CH4 and N2O emissions and rice yield changed with N application rate. Over different N application rate, combined application of CRF and urea reduced N2O emission by 3.6%~49.6% mainly during the midseason aeration (MSA) period as compared to urea. With rate of 80 kg·hm-2 and 160kg·hm-2, combined application increased CH4 emission by 48.1% and 27.5%, GWP by 45.0% and 22.8%, respectively; while no significant difference was found in rice yield. With rate of 240kg·hm-2, combined application reduced CH4 emission and GWP by 4.2%~15.1% and by 5.7%~13.9%, respectively, but increased rice yield by 7.5%~19.8%. Compared with other combined ratios (3:7, 1.5:8.5, 0:1), 4.5:5.5 is the best combined ratio of urea to CRF for the lower GWP and higher rice yield at rate of 240 kg·hm-2.关键词
控释肥/尿素/配合施用/施氮量/N2O排放/CH4排放Key words
controlled-release fertilizer/urea/combined application/N application rate/N2O emission/CH4 emission分类
农业科技引用本文复制引用
纪洋,于海洋,徐华..控释肥与尿素配合施用对稻季土壤CH4和N2O排放的影响[J].生态环境学报,2017,26(9):1494-1500,7.基金项目
国家自然科学基金项目(41401268) （41401268）
江苏省基础研究计划青年基金项目(BK20140992) （BK20140992）
江苏省高校自然科学研究面上项目(14KJB210006) （14KJB210006）
土壤与农业可持续发展国家重点实验室开放基金课题(Y412201414) （Y412201414）
