论文部分内容阅读
为探究添加死亡的放线菌细胞对土壤中微生物量碳、碱提取物及组分形成的影响,本试验选取灰色链霉菌和黑钙土为供试材料,设置添加死亡菌体组和对照组(ck)2个处理,相同条件下进行培养。研究结果表明:培养期间,添加组微生物量碳、“碱提取物质-C”(类似于胡敏酸和富里酸总和)及“碱溶酸溶组分-C(类似于富里酸)”含量一直明显高于对照。培养后期(50 d),添加组和ck中的微生物量碳相对含量分别为0.98%、0.71%;添加组“碱提取物质-C”、“碱溶酸不溶组分-C”(类似于胡敏酸)以及“碱溶酸溶组分-C”的相对含量分别为32.89%、4.10%、28.79%;而对照组分别为26.38%、7.39%、18.99%。同时,“碱溶酸不溶组分”2组无显著差异。说明死亡放线菌细胞能促进微生物量碳、碱提取物质以及“碱溶酸溶组分”的形成但对“碱溶酸不溶组分”影响不明显。
In order to explore the effects of adding actinomycete cells on the formation of microbial biomass carbon, alkali extract and components in soil, Streptomyces griseus and Chernozem were selected as test materials, and the groups of dead bacteria and control (ck) 2 treatment, under the same conditions for culture. The results showed that during the cultivation period, microbial biomass carbon, “alkaline extraction substance-C” (similar to the sum of humic acid and fulvic acid) and “alkali soluble acid-soluble component-C (similar to fulvic acid) ”Content has been significantly higher than the control. At the later stage of culture (50 d), the relative contents of microbial biomass carbon in the addition group and ck were 0.98% and 0.71%, respectively. The addition of “Alkaline Extraction Substance-C” and “Alkali- (Similar to humic acid) and the relative content of ”alkali-soluble acid-soluble component -C “ were 32.89%, 4.10% and 28.79%, respectively, while those of the control group were 26.38%, 7.39% and 18.99%, respectively. At the same time, ”alkali soluble acid insoluble components " 2 groups no significant difference. The results showed that the actinomycetes cells could promote the formation of microbial biomass carbon, alkali extraction materials and alkali-soluble acid-soluble components, but had no obvious effect on the insoluble components of alkali-soluble acid.