| 混合固氮菌剂-水稻联合体系的固氮特性 |
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| 引用本文： | 林凡,王正芳,王耀东,宋未.混合固氮菌剂-水稻联合体系的固氮特性[J].核农学报,1997,11(3):0-0. |
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| 作者姓名： | 林凡 王正芳 王耀东 宋未 |
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| 作者单位： | [1]江苏省农业科学院原子能农业利用研究所 [2]中国农业科学院原子能农业利用研究所 |
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| 摘 要： | 应用＾１５Ｎ示踪技术研究敢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／６６６．７ｍ＾２，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／ｍ＾２·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６６６．７ｍ＾２ １１３．３ｋｇ硫铵；稻谷
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| 关 键 词： | 固氮 固氮菌 水稻 |
| 收稿时间： | 2009-12-31 |
| 修稿时间： | 2009-12-31 |
CHARACTERISTICS OF NITROGEN FIXATION OF MIXED DIAZOTROPHS ASSOCIATED WITH RICE PLANT |
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| Abstract: | 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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| Keywords: | 15N t racing nit rgen-fixation diazot roph rice |
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