华南农业大学学报2026，Vol.47Issue(2)：245-251,7.DOI:10.7671/j.issn.1001-411X.202511018
氮素增效剂对稻鳅模式水稻光合效应及土壤氮素形态的影响
Impact of nitrogen synergist on rice photosynthetic effects and soil nitrogen forms in rice-loach model
摘要
Abstract
[Objective]This study aims to investigate the effects of nitrogen fertilizer synergists on soil nitrogen transformation and rice photosynthetic physiological characteristics in a rice-loach co-culture system,and provide an efficient nitrogen management strategy for rice-fishery integrated systems.[Method]A pot experiment was conducted under the rice-loach co-culture model with three treatments:application of a urease inhibitor(N),application of a nitrification inhibitor(M),and the combined application of both inhibitors(N+M).With no synergist application as the control(CK),soil inorganic nitrogen content,activities of key nitrogen transformation enzymes,and rice leaf photosynthetic characteristics were measured at different growth stages.[Result]Compared with CK,the nitrogen fertilizer synergist treatments improved rice photosynthesis,with the N+M treatment showing the best performance.The N+M treatment increased the net photosynthetic rate by 14.51%,14.69%,and 7.71%at the booting,full heading,and grain filling stages,respectively.The synergist treatments significantly increased soil ammonium nitrogen content while decreasing nitrate nitrogen content,and they also inhibited soil urease and ammonia monooxygenase activities.Correlation analysis revealed that the net photosynthetic rate was significantly and positively correlated with soil ammonium nitrogen content but significantly and negatively correlated with nitrate nitrogen content,urease activity and ammonia monooxygenase activity.[Conclusion]In the rice-loach co-culture system,nitrogen fertilizer synergists can effectively regulate soil nitrogen transformation towards a high-ammonium and low-nitrate state by inhibiting nitrogen-transforming enzyme activities,thereby significantly promoting rice photosynthesis.The combined application of urease and nitrification inhibitors demonstrates the optimal effect.关键词
稻鳅共生模式/氮素增效剂/土壤氮素/光合特性Key words
Rice-loach co-culture system/Nitrogen fertilizer enhancer/Soil nitrogen/Photosynthetic characteristics分类
农业科技引用本文复制引用
侯代杰,李谊慈,邹龙,刘豪,邓康胜,徐华勤..氮素增效剂对稻鳅模式水稻光合效应及土壤氮素形态的影响[J].华南农业大学学报,2026,47(2):245-251,7.基金项目
国家自然科学基金区域创新发展联合基金重点项目(U21A20184) （U21A20184）
