Attention should be paid to foliar fertilizer

Foliar fertilizer generally refers to organic and inorganic fertilizers with various forms and nutrients, which are processed into aqueous solution and sprayed on the foliar surface of plants according to certain technical requirements, concentration and dosage to provide nutrients for plants, which is generally called foliar fertilizer. It is also a means of extra-root topdressing. The role of foliar fertilizer is mainly to make up for the lack of nutrients absorbed by crop roots, promote crop physiological metabolism and growth and development, but also improve crop yield and quality, especially in the year of low temperature chilling injury. The annual production of field crops increased by 5% to 10%, fruit trees by 5% to 15%, and vegetables by 20% to 30%. In recent years, with the development of production, the popularization of agricultural mechanization and improved varieties, and the continuous improvement of crop yield, especially with the growth of planting years, the trace elements in soil decrease year by year, resulting in nutrient imbalance. In order to achieve sustainable development of agriculture and solve this prominent problem, using foliar fertilizer to supplement the lack of nutrients in the soil has become an important direction of agricultural development, so the use of foliar fertilizer should attract the attention of farmers. The new features of foliar fertilizer are: first, it has strong pertinence. Especially in the plots with formula fertilization, the crops will supplement whatever elements they lack, and as much as a large amount of micro-fertilizer is lacking. Second, the fertilizer effect is good and the absorption is fast. 1% to 2% urea, the amount absorbed in a day and night reached 1/3; 2% of calcium superphosphate, 5 minutes after spraying, the crops began to absorb and play a role. The third is to supplement the lack of nutrients. In particular, the root absorption was poor at the seedling stage, and the effect was very significant when zinc, magnesium, calcium, iron, phosphorus, potassium and other fertilizers were sprayed earlier at the seedling stage. In the year of low temperature and low light, foliar fertilizer is an excellent measure to promote early maturity and improve quality. The fourth is to save fertility. The use of foliar fertilizer solves the problem of fertilizer fixation, volatilization and loss in the soil, resulting in waste of fertility. 80% to 90% foliar fertilizer can be absorbed by crops. The fifth is to reduce costs. Spraying the foliar fertilizer of the farmer's newspaper card twice is tantamount to fertilizing the crops once. This not only solves the problem of maize de-fertilization in the later stage, but also achieves the problems of fertilizer saving, cost reduction and vegetable removal. The sixth is the new characteristics of the new foliar fertilizer. In a broad sense, the new foliar fertilizer takes into account both fertilizer and pesticide; fertilizer control (growth regulator); fertilizer stress (hormone, rooting powder, biological fungus, sugar); fertilizer resistance (resistance to diseases and insect pests, resistance to frost, resistance to drug damage. ) both. It is the development direction of agricultural green food and agricultural industrialization in the future. In the production and use of the new foliar fertilizer, it is necessary to grasp the period of use, methods and matters needing attention, and should not arbitrarily change the amount of use and increase the amount of use. In general, try to use it alone, reduce the amount of blending, and carry out a small area test 3-5 days before use, and then popularize it in a large area after there is no problem. When spraying bacterial fertilizer, it is best when there is no wind on a cloudy day.