通过砂培试验研究了标记基因对受体菌株的竞争结瘤能力和固氮有效性的影响。
In the nitrogen-free Pot experiment, the nodulating competitive ability of the parental and marked strains and their nitrogen fixing efficiency were tested.
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.
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.
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