Effects Of Biochar Prepared From Lentinula Edodes Stick Of Different Pyrolysis Temperature On Greenhouse Gas Emissions From Moso Bamboo Forest Soils

With the development of society,the increasing in greenhouse gas emissions was caused by human activities and made the global have a warming trend.Therefore,it is imperative to reduce global warming.Terrestrial forest ecosystems play an important role in global climate change due to their have a strong potential in carbon sequestration.Under-forest economy,as a famous form of modern forestry development,transform the advantages of forestry resources into economic advantages and greatly increased the value of forest lands.However,a large amount of waste biomass generated under the forest economy has restricted the sustainable development of forest economy.Recently,the rise technology of biochar has provided a new avenues for the reduction of carbon sequestration and has received widespread attention from all walks of life.The Shuangzhen Forest Farm locaed in Guixi City,Yingtan,Jiangxi Province,developing the under-forest?moso bamboos?economy of edible mushrooms and free picking mode,which not only increased the attention of visitors,but also provided income for the forest farm.Lentinus edodes?Berk.?Sing,as the good product of the forest farm,is the best-selling understory cash crop for tourists.However,after a large number of shiitake mushrooms are produced,the spent mushroom wastes was discarded and burned arbitrarily.How to deal the spent mushroom wastes was extremely limited,which not only wastes biomass resources,but also made a serious environmental pollution.Therefore,in my study,the biomass carbon of different pyrolysis temperatures?300,450,and 600°C?was performed using the spent mushroom wastes of Lentinus edodes?Berk.?Sing as raw material,and NH₄NO₃(100 mg N kg^-1 soil)was conducted by a laboratory incubation experiment?20,25,30°C?.The aims of this study were to evaluate the effects of biochar amendment on nitrogen fertilization and provide a theoretical basis for the recycling of under-forest waste and carbon sequestration by investigated the greenhouse gas emission and nitrogen transformation.The results show that:The pyrolysis temperature of 450°C biomass carbon and N fertilizer can significantly reduce the soil's net ammoniation,nitrification,and nitrogen mineralization rates.The application of biomass charcoal increased soil CO₂ emissions.As the pyrolysis temperature of biochar preparation increases,the CO₂ emission in the soil gradually decreased;when the pyrolysis temperature of 600°C biomass carbon and N fertilizer was applied,the soil CO₂ emission was lower than 300°C and 450°C,no significant difference with the control group.The addition of biomass carbon increased the cumulative CH₄ uptake in the soil,and the addition of N fertilizer inhibited the accumulation of CH₄ in the soil.The addition of biomass carbon at 25°C and 30°C can effectively reduce the cumulative N2O emissions.The addition of N fertilizer increased the rate of N2O emission from soil.In the application of N fertilizer and biomass charcoal,the higher the temperature of biomass carbon pyrolysis,the lower the potential increased in temperature,which can slow down the increase in temperature.In summary,the biochar of spent mushroom wastes prepared at a pyrolysis temperature of 450°C or 600°C with N fertilizers was applied to the soil of bamboo forest,which can effectively increase the utilization of N fertilizer,and can significantly reduce greenhouse gas emissions and made the recycling resources efficiently used.