Study On Carbon Footprint Of Key Technology System For Efficient Utilization Of Photothermal Resources In Wheat And Jade

In response to the extreme shortage of water resources,insufficient heat resources,imbalanced soil nutrients,frequent natural disasters,poor integration of agricultural machinery and agronomy,and insufficient integration with new business entities in the central and northern areas of the Taihang Mountain Piedmont,the national key research and development of the "13th Five-Year Plan" The planned project "Food High Yield Project" integrates the key technology system for the efficient utilization of Maiyu solar thermal resources in this area.With the goal of "high yield,efficiency and greenness",the technical system will be demonstrated and promoted for new business entities of large-scale production.In this study,a field comparative experiment was conducted in Zhongtong Village,Xinle City,to compare and analyze the carbon footprint of wheat and maize production between the technical system and the traditional technology,and to evaluate the greenhouse gas emissions of the technical system.The results are as follows:(1)Wheat carbon footprint.The carbon footprint per sown area of the demonstration field of this technology system is 6.57%higher than that of the control field,and the carbon footprint per unit output of the demonstration field is 0.87%lower than that of the control field.In the carbon footprint of the demonstration field,agricultural inputs and N2OFIELD accounted for 33.06%and 66.94%of the total planted area,respectively.The two parts that account for the highest proportion of carbon footprint are soil N2O emissions(55.32%)and irrigation power consumption(18.78%).In the carbon footprint of the control field,agricultural inputs and N2OFIELD accounted for 31.42%and 68.58%of the total carbon footprint of the total sown area.The two parts that account for the highest proportion of carbon footprint are soil N2O emissions(60.1%)and irrigation power consumption(20.09%).(2)Corn carbon footprint.The carbon footprint of the sown area of the demonstration field of this technology system is 11.62%lower than that of the control field,and the carbon footprint of corn per unit yield of the demonstration field is 24.43%lower than that of the control field.In the carbon footprint of the demonstration field,agricultural inputs and N2OFIELD accounted for 46.78%and 53.22%of the total planted area,respectively.The two parts that account for the highest proportion of carbon footprint are soil N2O emissions(24.58%)and irrigation power consumption(24.3%).In the carbon footprint of the control field,agricultural inputs and N2OFIELD accounted for 36.83%and 63.17%of the total sown area,respectively.The two components that account for the highest proportion of carbon footprint are soil N2O emissions(41.16%)and irrigation power consumption 21.63%).According to the calculation results and related analysis,the conclusions are as follows:(1)The carbon footprint per unit sown area of wheat in the demonstration field was 6.57%higher than that of the control field,and the carbon footprint per unit yield of the control field was 0.87%lower.The reason is that the control field production technology is not reasonable,not using soil testing formula fertilization,fertilizer input is not reasonable,the yield is reduced.(2)The carbon footprint of the sown area of the demonstration field was 11.62%lower than that of the control field,and the carbon footprint per unit yield of corn in the demonstration field was 24.43%lower than that of the control field.Wide-narrow row planting and slow-release fertilizer application in maize production than traditional technology can increase yield and significantly reduce greenhouse gas emissions.(3)The carbon footprint of the annual production unit of wheat and jade in the demonstration field was 1.12%higher than that in the control field,which was basically the same.However,the yield of wheat and maize in the demonstration field was much higher than that in the control field,and the carbon footprint per unit yield of wheat and maize in the demonstration field was lower than that in the control field.It can be considered that this technical system can achieve high yields and efficiency gains in this region without increasing greenhouse gas emissions,which is in line with the goal of "high yield,efficiency and greenness".It provides a basis for the promotion of this technical system in the central and northern areas of the Taihang Piedmont Plain.According to the results of this study,it is recommended to promote the integration of key technologies for the efficient utilization of solar and thermal resources,soil testing and formulated fertilization,promotion of slow-release fertilizer,optimization of fertilizer dosage,and reduction of carbon emissions in the local area.Plant row optimization configuration,through the implementation of wide and narrow row maize planting make full use of light and heat resources,improve maize yield.At the same time,in the future promotion,sowing and irrigation can be considered by combining meteorological conditions.By reducing the number of irrigation and irrigation,thereby reducing the carbon emissions caused by irrigation power consumption and fertilizer application.