Study On Carbon Footprint Of High-efficiency Technology System Of Conditioning Water And Fertilizer In Wheat And Jade Double Cropping Plough Layer

According to the climate,soil and other resources characteristics in the central and southern plains of Heilonggang and the two problems of unreasonable plough layer structure and fertility degradation and the contradiction between limited water irrigation and high yield in the production of wheat and jade,the national key research and development plan project"Grain High Yield Science and Technology Project" integrated the high efficiency technology system of plough layer conditioning for large-scale production in the region.In order to evaluate the greenhouse gas emission effect of the technical system under the target of "high yield,efficiency improvement and green",this study conducted a field experiment in Beilouxia Village,Changmadian Town,Ningjin County,and compared the carbon footprint of the technical system and the traditional planting mode of ordinary farmers by using the life cycle assessment(LCA).The results are as follows:(1)The carbon footprint per unit planting area and the carbon footprint per unit yield of wheat and maize demonstration fields were lower than those of the control fields;The annual carbon footprint per unit area of wheat and jade was also lower than the control field.Specific as follows:the total carbon footprint of demonstration field in wheat season was 2887.95 kg CO2 eqha-1,the total carbon footprint of control field was 3183.57 kg CO2eqha-1,the total carbon footprint of demonstration field was 295.62 kg CO2eqha-1,which was 9.2%lower than that of control field.The total carbon footprint of demonstration field was 1825.81 kg CO2 eqha-1 in maize season and 2303.8 kg CO2 eqha-1 in control field.Compared with the total carbon footprint of the control field,the carbon footprint of the demonstration field decreased by 477.99 kg CO2eqha-1,20.7%;The total annual carbon footprint of the demonstration field was 4713.76 kg CO2eqha-1 and that of the control field was 5487.37 kg CO2 eq ha-1.Compared with the control field,the total annual carbon footprint of the demonstration field decreased by 773.61 kgCO2eq ha-1 and 14.1%.The yield of winter wheat demonstration field was 7161.46 kg ha-1,and that of control field was 6646.02 kg ha-1.The yield of demonstration field increased by 515.44 kg,with an increase of 7.2%.The yield of summer maize demonstration field was 10091.84 kg ha-1,and that of control field was 9946.29 kgha-1.The yield of demonstration field increased by 145.25 kg,with an increase of 1.4%.(2)In terms of carbon footprint structure,soil N2O emission,irrigation electricity,fertilizer input and leaching are the main factors affecting the carbon footprint of wheat and jade production,which provides the basis for further improving the technical system in reducing greenhouse gas emissions.The following conclusions are drawn:(1)Compared with the traditional planting mode,the high-efficiency technology system of conditioning water and fertilizer in the double cropping layer of wheat and jade can achieve high yield and efficiency in large-scale production,and can effectively reduce the greenhouse gas emissions of wheat and jade.(2)The sprinkler irrigation technology under this technical system can not only reduce the input of water resources,but also reduce the carbon emissions generated by the irrigation electricity of carbon footprint.(3)Under this technical system,the application of chemical fertilizer is reduced,and the carbon emission of chemical fertilizer input is reduced.(4)The labor force in the production of wheat and jade in the region is insufficient and the mechanization degree is high.However,due to the less income from grain planting,ordinary farmers are not enthusiastic in production,extensive management,unreasonable investment in agricultural resources,strong randomness,and large investment in agricultural materials,but the does not increase accordingly,resulting in excessive greenhouse gas emissions.Through this study,it was found that ’Good High-yield Science and Technology Project’integrated water and fertilizer conditioning technology system of wheat and jade double cropping cultivated layer in the central and southern plains of Heilonggang could improve the utilization efficiency of water resources,reduce the application of chemical fertilizers,and to a certain extent,improve crop yields,regulate the soil layer,improve soil fertility;At the same time,increase the yield of wheat and corn,achieve high yield,water saving,weight loss and reduce pollution;It is suitable for large-scale wheat and maize production.