然而，只有在细菌（根瘤菌）达到一定数量时引发群体感应机制才能进行固氮。
However, bacteria fix the gas only when their population is high enough to trigger the quorum-sensing machinery.
根瘤菌是生物固氮的能手。
Nodule bacteria are very good at biological nitrogen fixation.
本文将探讨诱变对根瘤菌抗春雷霉素突变的作用，并对获得的抗性突变株的生物固氮特性进行分析。
This paper would explore the mutagenesis of Rhizobium mutants resistant to kasugamycin, and analyse the nodulation and fixation nitrogen character of the mutants.
不施氮肥只接种根瘤菌的处理，根瘤菌的固氮量虽高，但植株生长量和荚果产量则明显降低，单株结果数和荚果产量仅比对照处理增加6.9%和5.9%。
The nitrogen fixation rate per plant was high by inoculated rhizobia only, but the pod number and yield per plant only increased by 6.9% and 5.9% compared with CK.
环境因子的限制一直是豆科植物-根瘤菌共生固氮体系没有在农业生产中充分发挥作用的重要原因之一。
Environmental factors are always one of the major reasons why the symbiotic nitrogen-fixing system of rhizobia and legumes cannot come into full play in agricultural production.
但由于人工接种剂与土著根瘤菌的竞争结瘤问题一直未得到很好解决，阻碍了这些高效固氮菌株田间应用效果的发挥。
But the application of inoculant in field was blocked as the problem of nodulation competitiveness between inoculant strains and indigenous strains was not been solved completely.
乙炔还原活体测定共生固氮为短时间内筛选大豆——根瘤菌最佳共生体提供了简便、快速的方法。
We suggest that the acetylene reduction method in vivo is simple and fast from screening best symbiotic system of soybeans and nodule bacteria in short time.
在盆栽条件下比较研究了转基因重组根瘤菌与出发菌和参照菌的结瘤与共生固氮效率。
Plant pot experiments were carried out for the recipient strains and their transconjugants to compare their nodulation ability and symbiotic nitrogen fixation efficiency.
大豆随着氮肥施用量的增加，不仅抑制了大豆—根瘤菌的共生固氮作用，也给生态环境带来了不利的影响。
However, with the increasing of nitrogen fertilizer, it not only inhibits nitrogen fixation between soybean and rhizobium, but brings disadvantages to ecological environment.
其中研究的较早的生物固氮菌是与豆科植物共生固氮的根瘤菌。
Early study object of the biological nitrogen fixation bacterium is the Rhizobium which related to the nitrogen fixation of the Leguminosae.
其中研究的较早的生物固氮菌是与豆科植物共生固氮的根瘤菌。
Early study object of the biological nitrogen fixation bacterium is the Rhizobium which related to the nitrogen fixation of the Leguminosae.
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