In the process of traditional farming, farmers have the habit of applying various fertilizers with natural rainfall or irrigation. However, due to the uncertain watering amount, low nutrient content, single component and poor water solubility of the fertilizer, the effect of flushing fertilization is not very ideal. For example, the high local nutrient concentration causes seedling burning, and the nutrient concentration far from the water source is too low and has no fertilizer effect. Although flushing fertilizer has some disadvantages, it also has many advantages of its own. For example, nongdachong fertilizer adopts fully water-soluble high-quality raw materials, which is not easy to be solidified by the soil, does not harden the soil, is easy to be absorbed by plants, reflects the fertilizer effect quickly, and has no toxic residue.

First of all, from the physical properties, there are mainly two kinds of flushing fertilization: liquid barrel and solid powder bag. From the chemical properties and internal nutrients of fertilizer, it is mainly divided into three types: one is organic type, such as amino acid type, humic acid marine biotype, etc; One is a non model, such as potassium dihydrogen phosphate type, high calcium and high potassium type, etc; One is microbial type, such as photosynthetic bacteria, enzyme bacteria, etc. In addition, there is also a new type of flushing fertilizer produced by scientifically processing and compounding organic, inorganic, biological and other raw materials in the market, which belongs to a composite preparation. In terms of application scope, according to the nutritional needs of different crops, it can be divided into broad-spectrum, vegetable specific type, fruit tree specific type and special economic crop specific type.

Irrigation fertilization has the characteristics of simple use and rapid fertilizer effect, so it is generally used as topdressing variety in crop growth period. It is mainly applied in some cash crops such as various vegetables and fruit trees at the same speed or in a large number of fruiting periods. At this time, if ordinary fertilizer is applied, due to the slow release and transformation of nutrients and slow fertilizer effect, it is bound to affect the yield and quality. Especially when crops are cultivated in the greenhouse in winter, because of the adverse conditions such as low temperature and insufficient sunshine, a kind of high-quality and reliable flushing fertilization is selected for application, and the effect is very good.