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通过室内培养方式,研究不同浓度葡萄糖与无机氮肥(NH4)2SO4配施对土壤微生物将无机态氮转化为氨基酸态氮过程的影响。结果表明:和单施(NH4)2SO4培养相比,葡萄糖与(NH4)2SO4配合施用显著提高了土壤微生物将无机态氮向氨基酸态氮转化的程度,高浓度葡萄糖的添加更有利于无机态氮的同化。同样培养条件下NH4+-N、NO3--N和微生物量氮的数据表明,添加碳源明显降低了土壤中NH4+-N和NO3--N的含量,而微生物量氮量明显提高。表明活性碳源的加入明显提高土壤微生物活性,起到调控土壤微生物将无机态N转化为氨基酸态氮速率和容量的作用。
The effects of different concentrations of glucose and inorganic nitrogen fertilizer (NH4) 2SO4 on the conversion of inorganic nitrogen to amino acid nitrogen in soil microbes were studied through laboratory culture. The results showed that the combination of glucose and (NH4) 2SO4 significantly enhanced the transformation of inorganic nitrogen to amino acid nitrogen by soil microorganisms compared with (NH4) 2SO4 alone. The addition of glucose at high concentration was more favorable for inorganic nitrogen Assimilation. The data of NH4 + -N, NO3 - N and microbial biomass nitrogen under the same culture conditions showed that the addition of carbon source significantly reduced the contents of NH4 + -N and NO3 - N in soil, while the microbial biomass nitrogen increased obviously. The results showed that the addition of activated carbon source significantly enhanced the activity of soil microorganisms and played a role in regulating the rate and capacity of soil microorganisms to convert inorganic N to amino nitrogen.