Research On Anthropogenic Active Nitrogen Sources And Their Control Measures In Chinese Ecosystems

Human activities were greatly increasing the amount of nitrogen in the ecosystems and even beyond the earth capacity.This human-driven reactive nitrogen had a huge toll on the environment and human health,meanwhile enhanced the productivity of system and provided enough food for people.Therefore,how to understanding the human induced impacts on the reactive nitrogen between the human and environmental coupling system is very important,so is the practical environmental management measures.These both are challenging scientific problems of the world which current scientists are engaged in.China is experiencing rapid socio-economic development,increasing population and serious environmental reactive nitrogen population.And the region of China is one of the hot zones in nitrogen management.The research of the source of reactive nitrogen and the management strategies of reactive nitrogen can contribute to the control of nitrogen in China and the whole world.The sources of reactive nitrogen can divide into two parts:natural source and anthropogenic source.The anthropogenic source which including industrial nitrogen fixation,biological nitrogen fixation of cultivation and fossil fuel and biomass combustion is the main subject of the paper.Additionally,the paper analyses the impact of the population growth,economic development and urbanization on the creation of reactive nitrogen.The main results are as following:1)China’s anthropogenic reactive nitrogen including fertilizer N,biological nitrogen fixation of cultivation,fossil fuel and biomass burning increases from 29.62 TgN/a to 48.22TgN/a from 1994 to 2010.And it will increase to 54.91TgN/a in 2030.China will consume 52%of Asian anthropogenic reactive nitrogen creation.The fertilizer N is the main source of reactive nitrogen,followed by fossil fuel and biological nitrogen fixation of cultivation between 1994 and 2010.The creation of reactive nitrogen from fossil fuel grows faster than fertilizer N.What’s more the fossil fuel is going to pass fertilizer N and will become the prime motivator in the growth of reactive nitrogen.2)The population growth,economic development and urbanization are significant associated with the anthropogenic Nr creation.The population growth has positive exponential relation to the sources of reactive nitrogen.And the economic development and urbanization are liner positive correlation with the sources of reactive nitrogen.The fossil fuel is easily susceptible to the population growth.The fertilizer is influenced by economic development and urbanization.3)Through the analysis of the creation of reactive nitrogen in China.It is very vital to improve the efficiency of fertilizer N in agriculture,so as the continued perfection of the public traffic and infrastructure in city,energy saving and develop new energy in industrial and macro-control based on laws,regulations and policies of the state and local government.