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[Visitor (112.0.*.*)]answers [Chinese ]Time :2022-05-16
Fertilizers of the world
Since 1997 (except for 1990-1993), the use of fertilizers in the world has increased year by year. In the past 20 years, the proportion of urea and ammonium phosphate in the total nitrogen and phosphorus consumption has increased significantly, and the proportion of elemental phosphate fertilizer and nitrogen, phosphorus and potassium compound fertilizer has decreased. Countries have their own characteristics in terms of the varieties of fertilizers used. In recent years, the ratio of nitrogen, phosphorus and potassium in developed countries (N: P2O5: K2O) has been adjusted to 1: 0.42: 0.42.Due to the low proportion of phosphorus, potassium, especially potassium in developing countries, the proportion of the world is 1:0.39:0.26.1995/1996, the two countries that produce the most fertilizers in the world are the United States and China, and the production of the two countries is very close (accounting for 17.9% and 17.5% of the world's total fertilizer production, respectively), but China's nitrogen, Phosphorus consumption is 212% and 216% in the United States, respectively, while potassium consumption is only 63% in the United States..By 2001/02, the average annual growth rate of fertilizers in the world is projected to be 2.9%.The growth rate of China, South Asia and Latin America countries accounts for about 71% of the world's total growth.World nitrogen, phosphorus and potassium fertilizer production can meet future demand, and there are still different degrees of surplus...
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