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采用涂布平板法和最大或然数法,研究了红花檵木和西洋杜鹃2种校园绿化植物根际土壤主要微生物和氮素生理类群微生物的数量差异。结果表明:2种绿化植物根际土壤主要微生物以细菌占绝对优势,红花檵木的细菌数量为5.60×105 cfu/g;西洋杜鹃的细菌数量为2.15×105 cfu/g,其次是放线菌,真菌数量最少。氮素生理类群微生物的数量差异依次为硝酸细菌>固氮菌>氨化细菌>反硝化细菌。2种绿化植物根际土壤中,细菌、真菌和氨化细菌数量间差异显著;放线菌和固氮菌数量间差异显著;硝酸细菌和反硝化细菌数量间差异不显著。
The number of microorganisms in the rhizospheric soil microbes and nitrogen physiological groups in the rhizosphere soil of safflower alder and Rhododendron rhynchophylla were studied by using the coating plate method and the maximum likelihood method. The results showed that the main microorganisms in the rhizosphere soil of two kinds of greenery plants had the absolute advantage of bacteria, the number of bacteria was 5.60 × 105 cfu / g in A. sativa, 2.15 × 105 cfu / g in azalea, Fungus, fungus the least. Nitrogen physiological groups of the number of microbial diversity were nitric acid bacteria> Azotobacter> ammonification bacteria> denitrifying bacteria. There were significant differences in the numbers of bacteria, fungi and ammoniated bacteria in the rhizosphere soils of two kinds of green plants. The numbers of actinomycetes and azotobacter were significantly different between the two kinds of plants. There was no significant difference between the numbers of bacteria and fungi and bacteria.