基于毛竹林地土壤高效溶磷细菌组合的复合菌肥构建及其促生机制研究OA

Through pot experiments and comparative inoculation trials with different carrier substrates,this study sampled at the end of the growth season(T1)and the end of the rapid growth season(T2)to assess the func-tional effect of the combination of an efficient phosphorus-soluble microbial strain during the growth of bamboo seedlings.Additionally,specific carriers for the microbial strains were constructed to observe and analyze their ef-fects on seedling growth and the phosphorus nutrient environment in the soil.The results showed that both freeze-dried and liquid microbial agents from the synthetic microbial community significantly promoted seedling growth and nutrient accumulation.Among them,the liquid microbial agent had the best growth-promoting effect during the T1 period,with root biomass and total nitrogen content in the roots significantly increasing by 103%and 15.65%,respectively,compared to the control(CK).The freeze-dried microbial agent showed the best growth-pro-moting effect during the T2 period,with soil total nitrogen and available phosphorus content increasing signific-antly by 16.11%and 1105 times,respectively.The total biomass,as well as total nitrogen and total phosphorus content,increased significantly by 91.49%,76.32%,and 122.58%,respectively,compared to CK.A 1:1 volume mixture of peanut shells and sugarcane bagasse was suitable as the carrier for the synthetic microbial community.One year after the application of the phosphate-solubilizing solid biofertilizer constructed with this carrier,the soil available phosphorus significantly increased by 408%.At the T1 stage,the root and aboveground biomass of Moso bamboo seedlings increased by 8.7%and 41.9%,respectively,compared to the control(CK).At the T2 stage,the root and aboveground biomass of Moso bamboo seedlings increased by 32.3%and 746%,respectively,compared to CK.