Model Simulated Nitrogen Deposition Of Shenyang And Its Impact On Plant Growth

From the beginning of the industrial revolution,environmental pollution became a major social problem.Especially in the 20th century,the rapid development of all aspects of industrial,improve people's material life,while rapid urbanization,poor industrial layout increasingly serious environmental pollution.Considerable evidence that waste emissions have exceeded the carrying capacity of the environment itself.According to a number of world renowned environmental experts concluded that in today's world top 10 environmental problems,the most serious air pollution problems.Air pollution has become all countries,all regions of the key points to improve the environment,take the road of sustainable development.By Shenyang 934 industrial enterprises using CALPUFF simulated point source,point source diffusion transfer,simulated NO2 concentration values of the monitoring sites than for simultaneous monitoring of data,analyze the concentration of contributions from industrial sources for each point of air quality,which concentration contribution rate Taiyuan Street,xiaoheyan,Wenyi Road,Zhang Shi four-point industrial sources have reached more than 50%.Concentration of industrial sources of contribution rate of 20.4%-68.3%between the average concentration contribution rate of 40.3%.In this study,the use of non-stationary meteorological and air quality modeling system CALPUFF,Shenyang region in 2012 pollution inventory,meteorological data and air monitoring data,based on simulation Shenyang City and the surrounding areas of industrial pollution point,point source emissions diffusion transfer,simulated Nitrogen oxides(NOx)emissions from industrial enterprises in Shenyang City,the contribution of air quality concentration contour map,showing two high-value areas,namely the northeastern Shenyang and law library,law library highest concentration reached 150ug/m3,law library NOx the main contribution of concentration from construction ceramic products manufacturing enterprises,the highest concentration of Shenyang reached 75ug/m3,Shenyang major contribution to urban concentration and heat production from thermal power enterprises,due to the large urban population,the larger the increase in car ownership,car emissions are also important factors.On the whole,the concentration is higher than the eastern region of Shenyang western region,mainly because of the weather conditions and the distribution of industrial enterprises.This experiment is conducted to study the impact of N on the typical steppe populations of Leymus chinensis in the Shenyang Institute of Ecology belonged to the Chinese Academy of Sciences.It includes adding several concentration gradient of N into 360 pots(N Add Test:0,0.04,0.09,0.18,0.36 and 0.54 N/m2 6 levels),tracking samples six times and finishing record of the Leymus chinensis growth status in five consecutive months.This experiment can be defined a field controlling test about analyzing the traits of the Leymus chinensis's responding mechanism according to different concentrations of N treatments' impact.The results showed that,N factor on the growth of Leymus chinensis traits have a significant regulatory role,within a certain range,improved nitrogen Leymus chinensis specific leaf area and leafy green leaf nitrogen concentration.Meanwhile,along with the concentration gradient of increasing N,this test potted Leymus chinensis leaf dry weight,stem weight,root dry weight and plant dry weight increase with the amount of nitrogen added significantly inereased.Nitrogen distribution has a significant effect on the biomass of Leymus chinensis,interactive picking time and nitrogen treatment on leaf weight ratio,root weight ratio,stem weight ratio,leaf ratio,root to shoot ratio had a significant impact on both.With the increase of nitrogen gradient of nitrogen fertilizer can increase Aneurolepidium area,and sample Leaf Area high concentration of nitrogen added to the group still lower than the control group,suggesting that high concentrations of nitrogen,Leaf an area to some extent.Also discussed by Leymus chinensis(Leymus chinensis)green leaf nitrogen concentration and response specific leaf area(Specific leaf area,SLA)N concentration in the environment changes,with the increase of the concentration gradient of N Leymus chinensis green leaves showing leaf area ratio decreasing trend,the appropriate concentration of nitrogen for leaf area to maintain a reasonable ratio plays an important role,and reasonably specific leaf area of the photosynthetic capacity of crops,crop growth rate had a positive impact.N concentrations in the environment can change and affect leaf nutrient retention capacity-lower leaf nitrogen N's ability to maintain and improve the efficiency of its use of N,and in their degree of influence of different gradients are also different.Thus,global climate change,increasing atmospheric N deposition may have a direct impact on the use of plants to N's strategy to strengthen the comprehensive management of environmental pollution,reduce nitrogen deposition,and thus vegetation-have a profound impact on soil N cycling in the system.Simulated nitrogen deposition for grassland restoration and biodiversity restoration is beneficial.