Study On Carbon Footprint Of Water Storage Simplicity And Hydrothermal High Yield Technology System In Semi-dry Farming Of Wheat And Corn

According to the black dragon harbor,half dry land in the northeast region climate condition,soil condition and resource characteristics,such as the area wheat and corn faced during the production of water scarcity,such problems as insufficient resources of field,"much starker choices-and graver consequences-in" during the national key research project "food fertility project" in the region integration the wheat and corn half dry water storage section Jane and water thermal efficient productive technology system.The technology system aims at "high yield,increased efficiency and green",and carries out promotion and demonstration for local new business entities.In order to evaluate the energy saving and emission reduction effect of this technology system,a two-year field experiment was conducted in The Experimental station of China Agricultural University in Wuqiao County.The carbon footprint of wheat and corn production by this technology system is compared and analyzed with the traditional technology.The research results are as follows:（1）In terms of total carbon footprint.The carbon footprint of wheat and corn per unit sown area of this technology system is 12.35%and 4.21%lower than that of traditional technology.The carbon footprint of the annual planting area of wheat and corn is 9.30%lower than that of the traditional technology.The carbon footprint per unit yield of wheat and maize was 9.09%and 3.9%lower than that of conventional technologies..（2）Carbon footprint structure.The carbon footprint of the unit sown area of wheat in this technical system is 51%of agricultural input and 49%of N₂OFIELD.In traditional technology,agricultural investment accounted for 57%and N₂OFIELD for 43%.The main factors affecting the carbon footprint of the unit sown area of wheat with this technical system and traditional technology are all N₂O direct emission,irrigation electricity,nitrogen fertilizer and phosphorus fertilizer,which account for more than 80%of the overall carbon emission.In the carbon footprint of maize per unit sown area of this technical system,agricultural investment accounts for 59%and N₂OFIELD for 41%.In the traditional technology,the input of agricultural resources accounted for 56%,and N₂OFIELD accounted for 44%.There is little difference.（3）Electric carbon footprint for irrigation.The carbon footprint of wheat irrigation power consumption per unit sown area is 390.40kgCO₂eq ha^-1,and that of traditional technology is 729.88kgCO₂eq ha^-1,which is 52.63%of that of traditional technology.Based on the above research results,the following conclusions can be drawn:（1）Compared with the traditional technology,the water saving and hydrothermal high yield technology system of wheat and corn semi-dry farming can reduce greenhouse gas emission while increasing yield and efficiency.（2）In the carbon footprint of both the technology system and the traditional technology,wheat emission accounts for relatively large（accounting for more than 60%of the annual unit planting area of wheat and corn）,and there is almost no difference between the emission of corn and the traditional technology.（3）The main factors affecting the unit sown area of wheat are soil N₂O emission and irrigation electricity consumption.There is no significant difference between the two technologies of soil N₂O emission,so the main factor affecting the carbon footprint of wheat is irrigation electricity consumption.（4）The traditional technology did not realize the obvious increase of yield while increasing the irrigation amount.To sum up,this paper proves that wheat and corn semi-dry farming can reduce greenhouse gas emissions by reducing water storage efficiency and hydrothermal high yield technology system.Measures to improve the technical system to reduce greenhouse gas emissions from wheat jade production will largely rely on more efficient irrigation equipment to improve irrigation efficiency and reduce irrigation power consumption.Wheat quarterly carbon emissions accounted for a higher proportion of wheat annual carbon emissions,so we should continue to optimize the farming measures during wheat planting.