Effects of microbial fertilizer instead of partial chemical fertilizer on yield,quality and soil microorganisms of cauliflower
In Yuzhong County,Lanzhou City,Gansu Province,China,a 3-year consecutive experiment was carried out from 2018 to 2020 to monitor the impact of replacing chemical fertilizers with microbial fertilizer on the yield,quality and soil environment of cauliflower.There were three treatments:A,full amount of chemical fertilizer(com-monly used amount in local,100%chemical fertilizer);B:microbial fertilizer(60 kg·hm-2)+60%amount of chemical fertilizer commonly used in local;C,microbial fertilizer(120 kg·hm-2)+40%amount of chemical fertil-izer commonly used in local.The results showed that compared with treatment A,the yield of cauliflower under treat-ment B was 32.41,33.61 t·hm-2 in 2018,2020,respectively,which was significantly(P＜0.05)higher than that under treatment A by7.7%and2.1%,respectively.But,in2019,the yield of cauliflower under treatment A was significanly higher than that under other treatments.Compared with treatment A,the vitamin C content under treat-ment B and treatment C in 2019 was significantly higher by 72.2%and 94.3%,respectively,and the nitrate content of cauliflower under treatment B was significantly decreased by 7.0%.After the test for 3 years,the soil sucrase ac-tivity and available phosphorus content under treatments of B and C were significantly increased thant those under treatment A,while the soil available potassiumn content under treatment C was decreased significantly,yet the soil total phosphorus content was significantly increased.Compared with the treatment of full amount of chemical fertilizer,the relative abundance of soil beneficial microorganisms,such as Planctomycetota,Actinobacteria,Firmicutes,Mor-tierella,was increased,and the relative abundance of pathogenic bacteria,such as Olpidium and Spizellomyces,was decreased by 2.98%-42.97%and 80.69%-85.31%,respectively.In summary,application of appropriate amount of microbial fertilizer in place of chemical fertilizers could improve soil quality,balance microflora,and improve the quality of cauliflower in plateau planting areas.Under test conditions of this test,treatment B showed the best effect.
万方数据
维普
