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为明确减氮后移对超级稻吉粳88氮素吸收利用规律和转运特性,优化吉林省水稻高产高效合理氮肥施用技术,以吉粳88为供试材料,采用田间试验,通过设置不同氮肥减量后移处理,测定氮肥减量后移对吉粳88氮素吸收利用率及产量的变化情况。结果表明,氮肥减量后移比常规施氮增产-0.78%~7.5%;适量氮肥减量后移可促进吉粳88中后期的氮素总积累量,降低茎鞘和叶片氮素转运率,提高氮肥吸收利用率、氮肥农学利用率和氮肥偏生产力。综合考虑各因素,以施纯氮141.31 kg/hm~2,补肥和穗肥施氮肥时间分别比传统施肥时间后移13 d和9 d施氮方式效果最佳,最高产量达到11 t/hm~2。
In order to clarify the nitrogen absorption and utilization and translocation characteristics of super rice JiJing88 and to optimize the high yield and reasonable nitrogen fertilizer application technology of high yielding and high yield in Jilin province, with JiJing88 as test material, The amount of post-treatment to determine the amount of nitrogen reduction after the transfer of Jiantang 88 nitrogen uptake rate and yield changes. The results showed that nitrogen reduction increased -0.78% -7.5% compared with conventional nitrogen application. Appropriate amount of nitrogen fertilizer decreased the total nitrogen accumulation in the middle and late stages of Jijing 88, and decreased the nitrogen transport rate of stem, sheath and leaf. Improve nitrogen absorption and utilization rate, nitrogen fertilizer agricultural utilization and nitrogen fertilizer partial productivity. Considering all the factors, nitrogen application rate of 141.31 kg / hm ~ 2 was the best, and nitrogen fertilizer time of top-dressing and top-dressing were 13 and 9 days later than the traditional fertilization time respectively. The maximum output reached 11 t / hm ~ 2.