现已发现,接种固氮菌对各种禾本科作物和牧草的生长,干重,总氮含量及产量具有促进作用。但不知道提高产量是由固氮所致,还是由于改善了矿质营养,或是由于生长促进物质的缘故。据此,探讨了抗四环素和利福霉紊的含脂螺菌接种到水稻根际之后的情况。材料和方法土壤处理将 IRRI 试验田中的粘土彻底混匀,过2mm 筛,再加8kg 干土放入15L 的瓦格 It has been found that inoculation of azotobacter has a promoting effect on the growth, dry weight, total nitrogen content and yield of various gramineous crops and forages. However, it is not known whether the increase in production is due to nitrogen fixation or due to improved mineral nutrition or due to growth-promoting substances. Accordingly, the situation of tetracycline and rifamycin-containing lipidoid spirochetes inoculated into rice rhizosphere was explored. Materials and Methods Soil Treatment The clay in the IRRI trial field was thoroughly mixed, passed through a 2 mm sieve, and 8 kg of dry soil was placed in a 15-liter Wagner