Effects Of Buried Straw Reactor On Eggplant Growth And Soil Microenvironment In Greenhouse

The buried straw reactor is a new type of straw resource utilization method,which is to mix rice straw and other biological straws with the harmlessly treated livestock manure and microbial agents,and the ditch is buried between the facility soil planting rows.The CO₂ produced by the straw reactor in the biological fermentation process is subjected to CO₂ fertilization in greenhouse crops,and the fermenting heat energy is used to increase the temperature and heat preservation effect of the soil.The technology can solve the problem of serious shortage of CO₂ in greenhouses in winter facilities,improve the yield and quality of fruits and vegetables in greenhouses,and solve the problem of recycling and utilization of rural wastes.The economic,social and ecological benefits are extremely significant.In order to investigate the effect of different straw bioreactor technology on greenhouse eggplant production and soil microenvironment,four treatments were set up in this experiment:CK,T1(straw 22500 kg·ha^-1),T2(straw 22500 kg·ha^-1+microbial inoculants 60 kg·ha^-1+sheep dung 7800kg·ha^-1)and T3(straw 22500 kg·ha^-1+microbial inoculants 60 kg·ha^-1+sheep dung 7800 kg·ha^-1+humic acid 750 kg·ha^-1),using a combination of field trials and laboratory analysis,the main results are as follows:?1?The results showed that the application of different straw bioreactor formula could improve the quality of eggplant,and the yield of eggplant can be increased by 29.25%³2.33%.There is no significant difference in eggplant yield between different straw reactor treatments,and the treatment of T2 with the addition of amniotic faeces and bacteria significantly increased the concentration of total soluble sugar,vitamins and solids in eggplant and reduced nitrate content.?2?All the three straw reactor technologies effectively increased the average CO₂ flux in the greenhouse and increased the soil organic carbon and total nitrogen content.The amendment of organic fertilizers and microbial inoculants in T2 treatment promoted CO₂ release in the early growing stage of greenhouse eggplant,which effectively favor the accumulation of soil organic carbon and nutrients.The addition of humic acid?T3?had no significant effect on the greenhouse CO₂ production.?3?Straw bioreactor can affect the metabolic activity of microorganisms in soil.Different treatments can significantly increase the release rate of CO₂ in the reactor,change the sucession patterns of cultivable fungal and bacterial population,and tend to increase the number of actinomycetes at seedling stage.Besides,the addition of humic acid?T3?could improve soil microbial metabolic capacity,and accelerating the decomposition of soil organic matter,which might be more favorable to the early growth of eggplant cultivation.The research is of great significance for the popularization and application of straw bio reactor in the future.