1.土壤是微生物的培養基土壤是一個極其复杂的,具有自己來源,自己發展历史的有機自然物體。里面有固體的颗粒,顆粒與顆粒之間有孔隙;有水;有各種微生物的養料;有空氣。因此,土壤便天然地成了微生物的培養基。我們可以作這樣一個試驗,以加证明: 用一個杯子(图1),盛點土壤,加清水少許,略加 1. Soil is a medium for microorganisms Soil is an extremely complex organic natural object with its own origins and its own history. There are solid particles, particles and particles between the pores; water; there are a variety of microbial nutrients; air. Therefore, the soil naturally becomes the medium for microorganisms. We can make such a test to add proof: with a cup (Figure 1), Sheng point soil, add a little water, slightly