"As a typical energy-saving and environment-friendly product, liquid fertilizer must be the new favorite of China's fertilizer industry in the future."The reporter interviewed zhang chenglin, director of the crop nutrition and fertilization laboratory of south China agricultural university, the keynote speaker of the 8th and 4th council of the Chinese society of plant nutrition and fertilizer and the 2015 academic annual meeting held recently.To the reporter's questions about the development of liquid compound fertilizer director zhang had a patient answer.

Q: could you talk about the current development of liquid fertilizers in China?

Zhang chenglin: liquid fertilizer has been widely used in some developed countries. Liquid fertilizer accounts for 55% of the total fertilizer application in the United States. Britain, Australia, France and other countries also use a lot of liquid fertilizer.In Israel, the fields are almost 100 percent liquid fertilizer.China is a super power in the production and consumption of chemical fertilizers in the world.Liquid foliar fertilizers and flush fertilizers are the main liquid fertilizers in China.At present, the liquid fertilizer market is faced with the dilemma that there is no uniform industry standard, the quality is uneven, the products are mixed, and the output cannot be counted.

Q: what is liquid fertilizer?How does it work?

Zhang chenglin: liquid fertilizer, also known as fluid fertilizer, there are many varieties, can be roughly divided into liquid nitrogen fertilizer and liquid compound fertilizer two categories.What I am introducing today is a liquid compound fertilizer based on nitrogen, phosphorus and potassium nutrients, which can add moderate nutrient elements (Ca, Mg, S) and trace elements (Zn, B, Ca, Fe, Mn, Mo) as well as herbicides, pesticides, plant hormones, etc., and has a significant effect on increasing crop yield.Since the production process is mainly dissolved and mixed, the formula of liquid fertilizer can be easily adjusted, and special formula can be prepared according to the nutrient status of the soil and the nutrient requirements of the crops to meet the requirements of precise fertilization.

Q: can liquid compound fertilizer and water soluble fertilizer compete?

Zhang chenglin: water and fertilizer integration is a method to make fertilizers work efficiently. It is applicable to all crops. More and more farmers have realized that irrigation after melt-water fertilization is better than direct seeding of granular fertilizer.However, the water-soluble compound fertilizer on the market cannot be used by farmers, and only a small amount of it is used on some crops with high economic value.The market is in urgent need of instant, low-cost and effective fertilizers. However, the standards set by the relevant departments are too high and too strict. As a result, although Chinese enterprises have the technology, they cannot produce water-soluble compound fertilizers that farmers can afford.

Q: what are the advantages and disadvantages of liquid compound fertilizer and granular compound fertilizer?

Zhang chenglin: liquid compound fertilizer in its nutrient expression form is similar to traditional granular compound fertilizer, but the difference in the following three points: 1.2. A small amount of liquid compound fertilizer is used many times, generally not too much fertilizer;3. Liquid compound fertilizer contains more nutrients and organic matter, and nutrients are more balanced.If applied correctly, liquid compound fertilizer is usually 30% more effective than granular compound fertilizer.In addition, the liquid compound fertilizer has such advantages as low production cost, no pollution, easy to adjust the formula, simple quality inspection and so on.The biggest disadvantage of liquid fertilizer is that it is not suitable for long-distance transportation.Some farmers, in order to save costs, adopt the method of grinding granule compound fertilizer mixed with water, which on the one hand is slow to dissolve, and on the other hand, the core problem of scientific fertilization such as safe concentration, reasonable dosage and nutrient balance is more difficult to grasp.

Question: whether optimistic about the future development of China's liquid fertilizer market prospects?

Cheng-lin zhang: as chemical fertilizer consumption most populous country in the world, the liquid fertilizer is still in its infancy in China, to a certain extent, the development level of liquid compound fertilizer were positively correlated with the country's agricultural development level, China's guangxi zhuang autonomous region, is rich in raw material, as a result, liquid compound fertilizer in our country has a certain space for development.However, it is urgent to improve the production standards of China's fertilizer industry.It is suggested to refer to foreign standards of liquid soluble fertilizer industry.The standard of liquid fertilizer is not modified, the development of multi-functional liquid fertilizer is severely restricted, and the development of liquid fertilizer in China is hopeless.

Considering state to the requirement of increasing the environmental protection, land circulation of the acceleration and the expansion of the farm, appropriate amount of fertilizer to control more strictly, expansion of integration technology of water expansion of water-saving irrigation in the labor price increasing factors, such as fertilizer can realize to 2020 the goal of zero growth, will become the mainstream of future China liquid fertilizer.