Crop top dressing fertilizer has the advantages of rapid fertilizer efficiency, high utilization rate, saving of fertilizer, significant effect and simplicity. However, in the specific operations, scientific and reasonable measures must be taken to avoid waste and cause damage. The following ten points must be mastered.
1. Fertilizer varieties are suitable for many types of fertilizers, but some are suitable for foliar spraying, and some are not suitable for foliar spraying. Such as urea, potassium dihydrogen phosphate, calcium superphosphate leachate, potassium sulfate, borax, zinc sulfate, etc. can be sprayed, while some chlorine-containing, volatile and insoluble fertilizers (such as ammonium chloride, ammonium bicarbonate, Calcium, magnesium, phosphate, etc.) cannot be sprayed on the surface.
2. The spraying concentration should be suitable for the top dressing. According to different fertilizers, the spraying should be carried out according to the corresponding concentration. The concentrations of different fertilizers sprayed were: 1% to 3% urea, 0.3% to 0.5% potassium dihydrogen phosphate, 0.1% to 0.2% borax, 0.2% to 0.4% zinc sulfate, and 2% to 4% of superphosphate leaching solution. Ammonium sulfate 0.2% to 0.3%.
3. To spray targeted crops and soil-based fertilizers in accordance with the principle of lack of supplements. If the seedlings are thin and yellow, indicating nitrogen deficiency, nitrogen injection should be the main method; if the seedlings are in general, spraying with nitrogen and phosphorus should be the main solution; if the seedlings are long green, they should be sprayed with phosphorus and potassium.
4. To spray different crops in the critical period of crop needs fertilizer for fertilizers of different periods, need to be flexible, such as wheat should be sprayed after full-fat, soybean, peanut, rape should be at the beginning and full bloom Spraying separately, corn and sorghum should be sprayed during the grain filling period, and sweet potatoes and potatoes should be sprayed during fruit expansion.
5. The spraying site must be the absorption capacity of the leaves. The new leaves are stronger than the old leaves. For monocotyledons, such as wheat, the stomata on the leaves are almost the same, but the leaves are easy to be stained with fertilizer solution, so the front of the sprayer should be The main; and dicotyledonous plants, such as soybeans, cotton, stomata more than leaf surface, and the back of the sponge tissue suction capacity is strong, so the front and back of the leaf should be sprayed.
6. The amount of liquid to be sprayed should be sufficient. The specific dosage should be determined according to the crop type and growth period. The general requirement is that the fertilizer solution will flow from the leaf surface but not flow down. It is generally best for every 667 square meters (1 mu). Fertilizer volume 50 to 70 kg. At the same time in the whole growth period to spray 2 to 3 times is appropriate, separated by time of 7 to 10 days is appropriate.
7. To choose fertilizer time outside root dressing in order to perform best in humid weather. Sunny days should be sprayed before 10 o'clock in the morning and after 4 o'clock in the afternoon. In cloudy and windless weather, it can be sprayed all day.
8. One-spray and multi-effect spraying of two or more kinds of fertilizers and pesticides can improve the work efficiency, and has the advantages of saving fertilizer and saving medicine. However, when mixing, care should be taken not to mix acidic and alkaline fertilizers and pesticides that have antagonism.
9. Fertilizer spray should be even and considerate. General fertilizers are mostly in the form of solids. When used, they should be fully stirred to allow them to be completely dissolved. The spraying should be even and thorough, do not leak spray, but it can not be repeated spray, so as not to cause fertilizer damage. If yellow spots and focal edges appear on the leaves, normal growth of the crop will be affected.
10. To add active agent Add a small amount of active agent (such as silicone, neutral soap, washing powder) to reduce the surface tension of fertilizer solution, which is conducive to the spread and depth of fertilizer solution, can improve the spraying effect.
Shandong Chunyu Water-saving Irrigation Equipment Co., Ltd., founded in 2011, is located in Laiwu High-tech Zone, Jinan City. It is a high-tech enterprise focusing on innovative and efficient emitter mold manufacturing and emitter product research and development and production. After nearly ten years of innovation and development, it is the invisible champion enterprise in Shandong Province, and now it is in a leading position in this field in China.
Spring rain people-oriented, build talent highland. At present, the company has 16 high, fine and advanced technical personnel, and cooperates with a number of scientific research institutes, forming a mold design, emitter testing, flow testing and other professional technical personnel team. In recent years, it has obtained 3 invention patents, 33 utility model patents and 3 patent awards. In 2019, it was identified as an intellectual property advantage enterprise in Jinan. It has undertaken 4 provincial science and technology innovation projects and won 2 second prizes of Shandong Science and Technology Progress Award. The company has built Jinan drip emitter mold engineering technology research center, the company has a slow wire cutting, CNC machining center, precision EDM machine, 3D projection measuring instrument, CNC engraving, laser engraving and other advanced processing equipment. Mature technology and rich experience support the excellent quality of Chunyu. Spring Rain pays attention to every link of production, implements 8S management, strictly controls the quality of products at the beginning, the middle and the end, and forms the seamless link of production management. The company has independently researched and developed flat emitter molds with full hot runner, cylindrical emitter molds with full hot runner and other products. With excellent quality, competitive price and good after-sales service, the company is well known at home and abroad, and has been sold well in Egypt, India, Iran, Turkey, Saudi Arabia, the United States and other countries.
With the vision of "building a global professional emitter mold supplier" and the mission of "providing solutions for efficient and innovative production of global water-saving irrigation enterprises", the company takes "scientific and technological innovation to scale new heights; Keep improving, the pursuit of excellence; Honesty and trustworthiness, win-win cooperation "for the values of the enterprise. For the construction of water - saving and resource-saving society to make a positive contribution.
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Shandong Spring Rain Water Saving Irrigation Equipment Co.,Ltd. , https://www.drippermould.com