在根瘤菌的固氮作用中,钴是一种重要的微量元素。但如何应用钴来促进根瘤菌固氮作用的研究尚待深入。1979年,我们通过试验明确了紫云英水培溶液中钴的最适浓度范围。由于生产中根瘤菌接种多采用草炭菌剂拌种,所以必须把钴掺在草炭菌剂中,本试验的目的就在于找出草炭菌剂中钴的最适比例。 In rhizobia nitrogen fixation, cobalt is an important trace element. However, how to use cobalt to promote rhizobia nitrogen fixation remains to be further studied. In 1979, we determined the optimum concentration of cobalt in the water solution of the milk vetch by experiments. Because rhizobium inoculation inoculation adopts fumigation agent to seed more, so we must incorporate cobalt in feldsiella bacteria agent. The purpose of this experiment is to find out the optimum proportion of cobalt in felicide agent.