长期不同施肥处理对栗褐土可培养微生物数量的影响

在24年长期定位试验的基础上,以选择性培养基为基础研究长期定位施肥对土壤微生物种群及数量的影响,同时测定了土壤速效养分的含量,探讨了微生物与土壤速效养分的相关关系。结果表明,栗褐土微生物以细菌为主体,约占微生物总数的92.72%～95.91%;施用有机肥可以显著提高土壤微生物的数量,处理M1N细菌数量最多,显著高于对照;处理M1NP放线菌数量最多,处理M2NP真菌数量最多;施用有机肥可以显著提高土壤解磷细菌数量;细菌、真菌、放线菌和无机磷细菌与碱解氮、速效磷和速效钾相关性均达显著或极显著水平。

Effects of long-term different fertilization on culturable microorganisms quantity in cinnamon soil

The effects of long-term fertilization on soil microorganism populations and their quantity and the correlation between microorganism and available nutrients basis in cinnamon soil were studied in this paper.The results showed that bacterial was the main microorganism in cinnamon soil with the proportion of 92.72%~95.91%.Organic fertilizer could significantly increase the quantity of soil microorganism for bacteria quantity of M1N,actinomycetes quantity of M1NP,fungi quantity of M2NP were the highest of all treatments and the bacteria quantity difference of M1N compared with the control was significant.The quantity of phosphate-solubilizing bacteria also could be significantly increased under the conditions of using organic fertilizer.The correlations between bacteria,fungi,actinomycetes and inorganic phosphate-solubilizing bacteria with available nitrogen,available phosphorus and available potassium were in significant level.