混合固氮菌剂-水稻联合体系的固氮特性

• 作 者: 林凡 王正芳 王耀东 宋未
• 机 构: 江苏省农业科学院原子能农业利用研究所,中国农业科学院原子能农业利用研究所
• 出 处: 核农学报
• 发表日期: 1997年03期
• 关键词: 固氮菌剂 固氮量 水稻栽培 氮固氮菌 拔节期 稻株 稻谷产量 分蘖盛期 示踪技术 每穗实粒数

应用１５Ｎ示踪技术研究了南京土壤条件下混合固氮菌剂水稻联合体系的固氮特性。结果表明，紫香糯稻接种混合菌剂后，稻株利用的固氮量为１０３ｋｇ／６６６．７ｍ２，固氮率６．７％；拔节期—齐穗期是固氮高峰期，日平均固氮量达２４３１ｍｇ／ｍ２·ｄ，这阶段固氮量占整个生育期固氮量的４０９％；拔节期—成熟期的固氮量占整个生育期固氮量的７０％以上；节肥能力为每６６６７ｍ２１３．３ｋｇ硫铵；稻谷产量增加４１４％。

The 15N tracer technique was used to study the nitrogen fixation of mixed azotobacter-rice combination system in Nanjing soil. The results showed that after the inoculation of mixed incense of Xiangxiang glutinous rice, the nitrogen fixation capacity of rice plants was 103kg / 666.7m2 and the nitrogen fixation rate was 6.7%. The jointing stage and heading stage were the peak of nitrogen fixation and the daily average nitrogen fixation reached 2431mg / m2 · d. The amount of nitrogen fixation accounted for 409% of the total nitrogen fixation during the whole growth period. The amount of nitrogen fixation at jointing stage and maturity accounted for more than 70% of the total nitrogen fixation during growth period. 7m213.3kg ammonium sulfate; rice yield increased 4  14%.