上海农业学报2026，Vol.42Issue(4)：72-82,11.DOI:10.15955/j.issn1000-3924.2026.04.08
减氮对四川丘陵区水稻生理特性、氮素利用及产量的影响
Effects of nitrogen reduction on physiological traits,nitrogen use efficiency and yield of rice in the hilly region of Sichuan Province
摘要
Abstract
Using'Shenyou Yuehe Simiao'and'Huiliangyou Yuehe Simiao'as experimental varieties,four nitrogen(N)application rates were established,namely 180 kg/hm2(CK),150 kg/hm2(N-30),120 kg/hm2(N-60),and 0 kg/hm2(N-180),to investigate the effects of reduced nitrogen application on leaf area index,dry matter accumulation,total chlorophyll content,nitrogen use efficiency,and yield in rice.The results showed that for'Shenyou Yuehe Simiao',dry matter accumulation and total chlorophyll content under N-30 treatment were significantly higher than those under CK treatment.For'Huiliangyou Yuehe Simiao',the activities of nitrogen metabolism enzymes were highest under N-30 treatment;compared with N-30 treatment,the average nitrate reductase activity under N-180,N-60,and CK treatments decreased by 47.83％,28.36％,and 14.13％,respectively,and the average glutamine synthetase activity decreased by 37.58％,28.96％,and 21.53％,respectively.For both rice varieties,there were no significant differences in nitrogen accumulation between CK and N-30 treatments,and overall,their comprehensive nitrogen utilization performance was better under N-30 treatment.The yield of'Shenyou Yuehe Simiao'was highest under N-30 treatment,with no significant difference from CK treatment.The yield of'Huiliangyou Yuehe Simiao'was highest under CK treatment,with no significant difference from N-30 treatment.For both rice varieties,the effective panicle number,total grains per panicle,and 1 000-grain weight did not significantly differ between CK and N-30 treatments,while the seed setting rate was higher under N-30 treatment.Regression analysis of rice yield against N application rate indicated that the optimum N application rate for'Shenyou Yuehe Simiao'was 137.07 kg/hm2,with a corresponding yield of 9 665.52 kg/hm2;the yield of'Huiliangyou Yuehe Simiao'showed a continuous increasing trend over a N application rate range of 0-180 kg/hm2.Considering rice yield performance and nitrogen use efficiency,controlling the nitrogen application rate at 150 kg/hm2 for the tested rice varieties in the hilly region of Sichuan Province can ensure stable rice yield and improve nitrogen use efficiency.关键词
水稻/氮肥减施/生理特性/氮素利用/产量Key words
Rice/Nitrogen fertilizer reduction/Physiological traits/Nitrogen use efficiency/Yield分类
农业科技引用本文复制引用
邓俊,杨尔倮,张坷塬,王然,丁建明,张荣萍,兰艳,马鹏..减氮对四川丘陵区水稻生理特性、氮素利用及产量的影响[J].上海农业学报,2026,42(4):72-82,11.基金项目
四川省科技厅项目(2025YFHZ0119) （2025YFHZ0119）
广安市科技项目(2024NYF02) （2024NYF02）
国家重点研发计划项目(2023YFD2301903) （2023YFD2301903）
