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我們观察到,虽然土壤中微生物的种类很多,在一定条件下只有少数种类占优势。制备一定土样的营养冻粉平面培养,常見到在最高稀釋盤中只有一种或少数几种占80％以上。如果用选擇培养基来分离培养一定生理羣,也常見到一种或少数几种在最高稀釋盤中占优势。这些事实指出,一定土壤在一定条件之下,只有少数几种微生物对于土壤中相应的生物化学活动起决定性作用。进一步認識到,正因为占优势的种类对于土壤中相適应的活动起着决定性的作用,对这些种类应当調查清楚并詳加研究。对它們了解得愈多,就愈能够管制它們的活动,为农业生产服务。
We observe that although there are many kinds of microorganisms in the soil, under certain conditions, only a few species predominate. Preparation of a certain soil samples of frozen nutrition flat culture, common in the highest dilution plate only one or a few accounted for more than 80%. If you select a medium to isolate and culture a certain physiological group, but also common to one or a few dominant in the highest dilution plate. These facts point out that under certain conditions, only a few microorganisms in certain soils play a decisive role in the corresponding biochemical activities in the soil. It is further recognized that, precisely because the dominant species play a decisive role in adapting to the activity in the soil, these species should be investigated and studied in detail. The more we know about them, the more we can regulate their activities and serve agricultural production.