农业环境科学学报2025，Vol.44Issue(10)：2698-2708,11.DOI:10.11654/jaes.2024-1096
控释肥与尿素配合施用对太湖流域麦季土壤N2O排放的影响
Impact of co-application of controlled-release fertilizer and urea on soil N2O emissions during the wheat-growing season in the Taihu Lake basin
摘要
Abstract
This study conducted field in situ observational experiments using closed static chambers to investigate the effects of different application rates of controlled-release fertilizer(0,200,270 kg·hm-2)and their co-application with urea at different ratios(urea to controlled-release fertilizer ratios of 3∶7 and 1.5∶8.5)on N2O emissions,soil physicochemical factors,and wheat yield in the winter wheat cropping system of the Taihu Lake basin.The objective was to identify the optimal nitrogen fertilizer application measures for N2O mitigation and yield enhancement in the winter wheat cropping system of the Taihu Lake basin.The results showed that under sole application treatments of urea and controlled-release fertilizers,soil N2O emissions,N2O emissions per unit yield,wheat yield,and straw biomass all increased with the increment of nitrogen application.At the same nitrogen application rate(200 kg·hm-2 and 270 kg·hm-2),compared with urea treatment,controlled-release fertilizer significantly reduced soil N2O emission by 21.4％and 86.1％in the growing season of wheat,and increased wheat yield by 21.6％and 23.9％,which in turn reduced N2O emission per unit of yield.Under co-application treatments(urea to controlled-release fertilizer ratios of 3∶7 and 1.5∶8.5),soil N2O emissions and N2O emissions per unit yieldduring the wheat growing season decreased with the increased proportion of controlled-release fertilizers,while wheat yield and straw biomass increased.Compared to the urea treatment,different treatments of controlled-release fertilizer and urea reduced soil N2O emissions by 16.8％and 29.0％during the growing season,and increased wheat yield by 18.4％and 19.8％,which in turn reduced N2O emissions per unit of yield.The lowest N2O emissions per unit yield were observed when urea and controlled-release fertilizers were co-applied at a ratio of 1.5∶8.5.Soil N2O emission fluxes during the wheat growing season were significantly positively correlated with soil temperature and NH4+-N concentration,and not significantly correlated with soil water-filled pore space.Therefore,considering both N2O emissions and wheat yield,an application rate of 200 kg·hm-2,with urea and controlled-release fertilizers co-applied at a ratio of 1.5∶8.5,is recommended as an optimal application strategy for controlled-release fertilizers in the winter wheat cropping system of the Taihu Lake basin.关键词
控释肥/配施/N2O排放/产量/小麦Key words
controlled-release fertilizer/co-application/N2O emission/yield/wheat分类
农业科学引用本文复制引用
魏欣悦,纪洋,马静,张广斌,徐华..控释肥与尿素配合施用对太湖流域麦季土壤N2O排放的影响[J].农业环境科学学报,2025,44(10):2698-2708,11.基金项目
国家自然科学基金项目(42077043,42277332)National Natural Science Foundation of China(42077043,42277332) （42077043,42277332）
