Present Situation Survey And Coping Strategies Of The Effects Of Nitrogen Fertilizer Rates In Fujian

Nitrogen fertilizer industry occupies a very important position in China's agriculture, nitrogen productivity of farmland are the main limiting factor, our country is the world's large agricultural, chemical fertilizer production in the last century, has an annual output of 9 million t, most of them nitrogen fertilizer, nitrogen fertilizer use accounts for the amount of the world's 1 / 4, heavy use of nitrogen fertilizer to increase crop production has played a positive role in the present province of nitrogen fertilizer applied in agriculture are mainly urea, ammonium nitrate, ammonium bicarbonate, chloride, ammonia, sulfuric acid ammonia. Nitrogen fertilizer mainly NH 'and NO' form absorbed by plants, however, with increased nitrogen fertilizer use, nitrogen loss of farmland caused by surface water eutrophication, declining quality of agricultural products, such as a series of environmental and food safety is becoming increasingly serious and growing attention in many studies have shown that does not control the agricultural non-point source pollution can not fundamentally solve the water pollution problems. Nitrogen fertilizer on the ground of the concentration and output, are non-point source pollution contributed to large but difficult to control one of the issues, governance of nitrogen non-point source pollution, the ecological environment protection and sustainable development of agriculture has great contribution, therefore, subject selection for the study of nitrogen fertilizer, and production of the actual combination of working closely with a very practical significance. First of all, our province the use of chemical fertilizers are nitrogen, followed by the phosphate fertilizer, followed by potash and trace elements such as chemical fertilizers. Fertilizer use has undergone continuous improvement process, the 20th century, the 50's and province around the different varieties of fertilizers in different soils and crops to do a lot of fertilizer effects of exercise, as a result of soil due to crop Fertilization to provide a scientific basis for the 60's. Our Province address how to reduce losses, improve efficiency of fertilizer utilization and promotion of research work, and achieved very good results. 80's, with the fertilizer application amount of the rapid increase in a single application of fertilizer and rely on the experience of the fertilization method has been the development of agricultural production can not meet the growing demand. Fertilizer NPK appropriate dosage and a reasonable proportion of research came into being.