Analysis Of Factors Affecting Atmospheric Ammonia In Luancheng Farmland And Study On Emission Reduction Measures

With the development of economy,China's agricultural development is faster and faster,and people's living standards have been greatly improved,but a series of problems also arise.Although the development of agriculture has increased the yield of crops,it has also caused certain environmental problems,because the large use of chemical fertilizers and pesticides has made the environmental problems more and more serious.The use of chemical fertilizer is the most important way to increase crop yield in China,and the annual use of chemical fertilizer in China occupies an important position in the world.However,the low utilization rate of nitrogen fertilizer in China has caused waste of nitrogen resources and environmental problems,and ammonia volatilization is one of the main ways of nitrogen loss.Ammonia is one of the most important alkaline gases in the atmosphere,which has direct or indirect effects on soil acidification,water eutrophication and greenhouse effect.The results show that ammonia emission from agricultural sources is the main source of atmospheric ammonia,and nitrogen fertilizer application is one of the important sources of agricultural ammonia emission.Therefore,it is of great significance to study the atmospheric ammonia emission from farmland for improving the ecological environment.On the basis of consulting a large number of agricultural information,this paper takes Luancheng experimental farmland as the research object,and through field investigation to analyze the current situation of local farmland management,mainly from fertilization management,farming management,irrigation management and other aspects,obtains the main contents of farmland management.Through literature review and field investigation,the factors influencing the atmospheric ammonia emission of farmland are summarized from fertilization management,irrigation management,tillage management,meteorological factors and crop condition.The key factors influencing the atmospheric ammonia emission of farmland,such as fertilization amount,fertilization type and meteorological factors,are analyzed qualitatively by using analytic hierarchy process.On this basis,the change of ammonia concentration in farmland atmosphere was quantitatively analyzed by association rules,and the data relationship between the level of ammonia concentration in farmland atmosphere and the key influencing factors was excavated,and the association relationship between influencing factors was realized.According to the results obtained,measures to reduce the atmospheric ammonia emission from farmland are put forward.For example,the atmospheric ammonia emission from farmland is lower under the condition of low fertilizer application.Therefore,under certain conditions,increasing fertilizer application appropriately not only ensures the yield of crops,but also reduces the atmospheric ammonia emission from farmland.When relative humidity is high and precipitation is constant,the concentration of ammonia in farmland atmosphere is low,so reasonable farmland irrigation is carried out to increase the relative humidity of air to a certain extent.Therefore,these measures can provide help for future farmland management,and have guiding significance for environmental protection.