Position: Home > Articles > CHARACTERISTICS OF NITROGEN FIXATION OF MIXED DIAZOTROPHS ASSOCIATED WITH RICE PLANT
Journal of Nuclear Agricultural Sciences
1997
(3)
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
单 位：
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
关键词：
~（15）N示踪,固,氮固氮菌,水稻
摘 要：
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１０３ｋｇ／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２４３１ｍｇ／ｍ２·ｄ，这阶段固氮量占整个生育期固氮量的４０９％；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６６６７ｍ２１３．３ｋｇ硫铵；稻谷产量增加４１４％。
译 名：
CHARACTERISTICS OF NITROGEN FIXATION OF MIXED DIAZOTROPHS ASSOCIATED WITH RICE PLANT
作 者：
Ling Fan\ Wang Zhengfang (Institute for Application of Atomic Energy, Jiangsu Academy of Agricultural Sciences, Nanjing 210014) Wang Yaodong\ Song Wei (Institute for Application of Atomic Energy, Chinese Academy of Agricultural Sciences, Beijing 1000
关键词：
N tracing, nitrgen fixation, diazotroph, rice
摘 要：
Characteristics of N 2 fixation of diazotrophs associated with rice plant in paddy soils in Nanjing was studied by 15 N tracing technique. The results showed that amount of N fixed by rice plant was 1.03kg/666.7m 2 and the rate of fixed N was 6.7%. The maximum N fixed was occured during jointing—complete heading stage. The daily average amount of N fixed reached to 24.31mg/miniplot·day. The fixed N of jointing—complete heading stage was 40.9% of that whole rice growth stage. The amount of fixed N during jointing—maturing stage was over 70% of whole rice growth stage. The economic benefits for fertilizer saving was 13.3kg/666.7m 2 of ammounium sulphate. The yield of rice grain was increased by 4.14% after inoculation with the mixed diazotrophs. \ \
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