土壤2024，Vol.56Issue(6)：1198-1205,8.DOI:10.13758/j.cnki.tr.2024.06.007
减氮条件下施用固氮蓝细菌对黑土稻田水稻产量、氨挥发和氮肥利用率的影响
Impacts of Nitrogen-fixing Cyanobacteria on Rice Yield,Ammonia Volatilization and Nitrogen Use Efficiency in Phaeozem Paddy Field Under Nitrogen Reduction
摘要
Abstract
In this study,the effects of the application of nitrogen-fixing cyanobacteria under nitrogen reduction on rice yield,ammonia volatilization loss and nitrogen use efficiency in Phaeozem paddy field were studied by pot experiment,which included five treatments:0N(no nitrogen fertilizer),0.7N(70％nitrogen application rate),1N(full nitrogen application),0.7NDB(high temperature autoclaved nitrogen-fixing cyanobacteria combined with 70％nitrogen application rate),0.7NB(fresh nitrogen-fixing cyanobacteria combined with 70％nitrogen application rate).The results showed that the grain weight of 0.7NB was not significantly different from that of 1N treatment,but 23.32％higher than that of 0.7N treatment.The apparent nitrogen use efficiency and agronomic nitrogen use efficiencyof 0.7NB were 1.2 times and 1.78 times higher than that of 0.7N,and increased by 48.00％and 35.57％than 1N treatment,respectively.At the level of 0.7N,the application of fresh nitrogen-fixing cyanobacteria decreased the ammonia volatilization rate and cumulative ammonia volatilization,while the application of high temperature autoclaved nitrogen-fixing cyanobacteria significantly increased the cumulative ammonia volatilization.In contrast to 1N,the ammonia volatilization rate and cumulative ammonia volatilization of 0.7NB and 0.7NDB decreased significantly,and the total cumulative ammonia volatilization was reduced by 66.80％and 37.36％,respectively.The results suggested that the application of fresh nitrogen-fixing cyanobacteria could replace 30％nitrogen fertilizer,sustain rice yield,reduce soil ammonia volatilization loss and improve nitrogen use efficiency.关键词
固氮蓝细菌/水稻产量/产量构成/氨挥发/农学利用率/表观利用率Key words
Nitrogen-fixing cyanobacteria/Rice yield/Yield components/Ammonia volatilization/Agronomic nitrogen use efficiency/Apparent nitrogen use efficiency分类
农业科技引用本文复制引用
张静如,王慧,周蓉,靳鹏辉,蔺兴武,赵学强,马晶晶,贾仲君,谢祖彬..减氮条件下施用固氮蓝细菌对黑土稻田水稻产量、氨挥发和氮肥利用率的影响[J].土壤,2024,56(6):1198-1205,8.基金项目
中国科学院战略性先导科技专项(XDA28030201)、国家重点研发计划项目(2022YFD1500201)和国家自然科学基金项目(42177333)资助. （XDA28030201）
