Application Effect And Promotion Strategy Of Vegetable Waste Biogas Slurry Fertilization In Luliang County

The vegetable industry in Luliang County has developed rapidly in the past 10 years,and has provided strong support for the production and life of local residents.However,due to the long-term monoculture mode and excessive application of chemical fertilizer,soil acidification and compaction,vegetable quality decline and the disorderly disposal of vegetable wastes have brought severe challenges to the ecological environment.Therefore,this paper studied the scientific use of vegetable waste biogas slurry on vegetables in Luliang County through pot experiment.To explore the change rule of partial replacement of chemical fertilizer by biogas slurry applied according to the principle of isonitrogen content and single application of biogas slurry with different gradient on cabbage quality and soil nutrient content,the experimental conclusions are as follows:(1)Biogas slurry can promote the growth and development of Chinese cabbage.In the two groups of experiments,the application of biogas slurry significantly promoted the leaf number,leaf width,fresh weight,chlorophyll SPAD,Vc,reducing sugar,total sugar and nitrate contents of Chinese cabbage,and the difference was significant.The root length,water content and plant height of Chinese cabbage were not affected.When biogas slurry partially replaced chemical fertilizer,T3 treatment(75%biogas slurry +25% chemical fertilizer)had the best results,and the yield of cabbage increased by 112.54% and 44.86% compared with CK and CF treatment,respectively.When only biogas slurry was applied,T5 treatment(1.5 times nitrogen biogas slurry)had the best results,and the yield of cabbage increased by 33.2% compared with CF treatment.When the application of biogas slurry was 2 times nitrogen biogas slurry,the yield of cabbage decreased,indicating that excessive application of biogas slurry should not be carried out.(2)Biogas slurry can improve soil quality.In the two groups of experiments,with the growth of Chinese cabbage,soil p H,nitrogen content,available phosphorus and available potassium content increased first and then decreased,while organic matter content showed an increasing trend with significant differences.The contents of the above indexes in soil at harvest were higher than those of CK and CF treatments.This shows that applying biogas slurry can improve soil quality and increase soil nutrient content.(3)The software IMB SPSS Statistics 25.0 was used for principal component analysis of each treatment in this experiment,and the comprehensive ranking order was obtained as follows: T3>T2>CF>T5>T6>T4>T1>CK.The results showed that T3treatment(75% biogas slurry +25% chemical fertilizer)was the best fertilizer treatment for Chinese cabbage.According to the experimental results,literature analysis and comparison and combined with the actual situation of Luliang County,SWOT analysis was carried out on the promotion of biogas slurry vegetable planting technology in Luliang County,to provide the feasibility and necessity of the theoretical conditions for the promotion of planting technology in Luliang County,so as to work out the promotion of biogas slurry vegetable planting technology in Luliang County.With the cooperation of Luliang County government and County Bureau of Agriculture and Rural Affairs,the technical communication stage was divided into three methods: mass media,contact group discussion and personal contact.In the promotion and application stage,agricultural extension personnel and village committees of various towns and townships were organized to select farmers,cooperatives and enterprises to visit,study,exchange and discuss in the base;Agricultural extension personnel and targets will be trained in a centralized manner.Follow-up follow-up service stage,establish biogas slurry planting vegetable service organization,form the "enterprise + farmer + order" and "cooperative+ farmer + order" mode,at the same time arrange agricultural extension personnel return visit regularly,solve the farmer encountered difficulties in the planting process.Promote the formation of Luliang County "organic plant-vegetable waste comprehensive utilization(biogas slurry)-organic planting" agricultural circular economy model,improve its economic benefits,ecological benefits and social benefits.