In a broad sense, China's production of controlled-release fertilizers has a history of more than 10 years. However, the only currently successful application is the stabilization of nitrogen fertilizers by urease inhibitors of the Shenyang Institute of Ecology, the Chinese Academy of Sciences, the use of fertilizer coated slow-release fertilizers by the Institute of Engineering of the Zhengzhou University, the slow release of rice fertilizer by the Soil and Fertilizer Institute of the Guangdong Academy of Agricultural Sciences, and Shanghai Hanfeng. Sustained release Fertilizer Co., Ltd.'s slow release BB fertilizer and so on. Most of these enterprises are in the northeast, and a small part of them are enterprises in North China and Northwest China. Fertilizers are mainly sold to the corn producing areas in northeast and north China. It is estimated that about 500,000 tons will be rolled out.
In 1988, he obtained patents for inventions from two countries, China and the United States, with fertilizer-enveloped fertilizer and its manufacturing process. In the same year, he won the third prize for national science and technology invention. In 1999, "International Fertilizer" magazine praised fertilizer wrapped fertilizer as "China's first - future fertilizer." It is reported that the "packaged slow-release fertilizer industry standard" has now been approved by the relevant departments, which will create more favorable conditions for the production, promotion and use of China's slow-release fertilizer.
The biggest feature of fat-enriched slow-release fertilizers is that they are not lazy. Every fertilizer will do its best to release 100% of the active ingredients to the growing process of the crop. Even if it is empty, it will loosen the soil. The role.
According to the American AOC method, the fertilizer effect of wrapped slow-release fertilizer is as long as 90 to 120 days, and the fertilizer efficiency of its third-generation product can be as long as 150 days, which can fully meet the needs of nutrients during the entire growing period of major domestic crops. Experiments show that: 50 kg of ordinary fertilizer is applied per acre, while wrapped slow-release fertilizers only need 35 to 40 kg. Through farmland tests in areas such as Henan, Shandong, and Guangdong, the nitrogen fertilizer utilization rate of coated slow-release fertilizers has increased by 7.74%, and it has been shown to increase production by 10% to 15% compared with common compound (mixed) fertilizers in various crops.
The objective of the encapsulated slow-release fertilizer is to control the ammoniation and nitrification of the water-soluble nitrogen fertilizer, mainly urea (or ammonium nitrate), to reduce losses and increase the nitrogen fertilizer utilization rate. The technical feature is that the coated fertilizer is made of fat and fertilizer, the cost is low, and there is no secondary pollution. Its advantage is that it can effectively increase the nitrogen utilization rate in response to China's national conditions, and is cheaper than most slow-release fertilizers. It has broad application prospects in the Chinese market. At present, the promotion of coated slow-release fertilizers in the northeast region has been very effective.
However, there are three reasons for the slow development of China's slow- and controlled-release fertilizers market. First, farmers have low awareness. The second is to reduce production costs and become the key to the promotion of large-scale farmland. At present, the domestic tonnage of controlled-release fertilizers is generally between 600 yuan and 800 yuan per ton, plus factory management and operations, and the price per ton is 800 to 1,000 yuan higher than that of ordinary fertilizers, and then the market sales price is even higher. As a result, the peasants could not afford to look good and could not afford it. They were called "noble fertilizers." Third, it is necessary to establish a powerful R&D and promotion platform.
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