Slow release fertilizers for the protection of food security, increasing peasant income, energy saving, environmental protection and so is of great significance in recent years more and more attention by the government and farmers, and its prospects do? Recent press interview on the topic of Resources and Environment, Shandong Agricultural University University Professor Zhang Min. 

        The rapid development of controlled release fertilizers in China 

        Controlled release fertilizer industry in China, though relatively short, but the rapid pace of development. Zhang said the people of China in 2005, but the total previously controlled release fertilizer 3-5 million tons, about 35 million tons in 2007, while the current production has more than 1 million tons, about the world's total output of slow release fertilizers 1 / 2 ,2007-2009 average annual growth of more than 60%, the current annual growth rate of China's chemical fertilizer about 3% compound annual growth rate of about 7%, sustained and controlled release fertilizer in the growth rate is much higher than the growth rate of fertilizer and compound fertilizer, controlled release fertilizer industry and the current growth momentum continues unabated, companies concerned about the sustained and controlled release technology is not limited to fertilizer companies, upstream of the nitrogen fertilizer business also began to have expressed strong concern It is estimated that in the next 3-5 years will increase 50% annual growth rate. However, sustained and controlled release fertilizer industry is a new industry, the current market share is also very small, its total output less than 1% of the total output of chemical fertilizers, assuming the same amount of fertilizer, slow release fertilizer if in accordance with the average annual growth of the next 3 years, 50% average annual growth of 30% was calculated to slow release fertilizer production in 2015 could reach 6.5 million tons, share less than 5% of the total output of chemical fertilizers, so the development space. 

        Available controlled release fertilizer fertilizer development and the development of complementary 

        The rapid development of controlled release fertilizers in China, can replace the current available fertilizer? Zhang Min said that the development of slow release fertilizers are not completely replace the current available fertilizer, serious quick fat loss, but despite its quick, slow release fertilizer can reduce fertilizer loss, the two complement each other, will be the focus of the future system of fertilization .

        Irrational structure of China's fertilizer products, the proportion of single-quality fertilizer is too large, composite lower rate, only about 30%, and the world average of 50%, 80% of the level of developed countries, there is a wide gap between the proportion of crop-specific fertilizer use smaller, so fertilizer is still more room for development, with industrial restructuring, the industry concentration degree will be gradually increased, more efficient and dedicated to the direction of development, sustained and controlled release fertilizers and fertilizer complement each other, will be gradually weaken the position of single-quality fertilizer. 

        Favorable factors will contribute to the development of controlled release fertilizer industry 

        Positive factors which will promote the development of controlled release fertilizer industry? Zhang Min of that first planting structure adjustment. In recent years, deepening adjustment of agricultural planting structure, expanding cash crop cultivation, while the proportion of cash crops was significantly higher than food crops, fertilizer investment, according to statistics, the crop nutrient requirement of food crops is generally 1.2-2.6 times Therefore, with the planting structure adjustment, the total input of fertilizer to grow, it will be on our national resources and the environment a tremendous challenge. Meanwhile, people's quality requirements of cash crops is much higher than food crops, so the quality of the fertilizer requirements will increase, the crop output ratio is higher than food crops, their crop fertilizer costs than the relatively weak sensitivity number. Therefore, adjustment of planting structure on the development of controlled release fertilizer greatly facilitate.

        Second, for field crops is a slow release fertilizer development. How to reduce the cost of controlled release fertilizer production has been plagued industry problems. Slow release fertilizers in China Research efforts from the beginning for field crops, and made important progress in this regard. First, the membrane material has made an important breakthrough in China, developed a relatively low cost, good controlled release properties of the membrane material, effectively reduce the cost of production; The second is to use slow release fertilizers and fertilizer blending of conventional type BB fertilizer, available nutrients and slow to effectively combine nutrients, crop growth cycle is not only necessary, but also greatly reduces the cost of production and use, is China's sustained and controlled release fertilizer is one important direction for future development. 

        Controlled release fertilizer to support the development needs of the government 

        As the controlled release fertilizer in increasing yield and income, energy conservation, environmental protection has a positive effect, countries have introduced policies to support industries related to the development of controlled release fertilizer industry, the United States in October 2009 introduction of slow release fertilizers States subsidy incentives, subsidy level of about 12-22 dollars per acre, each household can apply for 5 consecutive years, the maximum annual subsidy per household was 40,000 U.S. dollars. In China, though strongly encouraged the development of controlled release fertilizer, but in addition to policy support, research and industry support of research in the field outside the popularization and application of its lack of strong support. To this end, Zhang Min suggested that China's sustained and controlled release fertilizer applications for subsidies can learn from the United States, controlled release fertilizer subsidies or domestic current more mature organic fertilizer subsidy mechanisms to facilitate its application in large scale in China.

        Zhang Min of the controlled release fertilizer industry full of confidence, he said, the development prospects of this emerging industry, the future will maintain a rapid growth in market share continued to improve; product type continuously enriched and diversified pattern of change; products market is gradually broken down, a special controlled-release fertilizer for crops will be the focus of future development. (Zhang Qin)