The correct application of trace fertilizer to vegetables is one of the important measures to promote the high quality and high yield of vegetables. Therefore, many vegetable farmers are now paying attention to the application of trace fertilizer. However, some vegetable farmers do not evenly apply the micro fertilizers to vegetables when they are used in different amounts. Some of them even exceed the safe amount several times. This brings a series of side effects, which not only causes serious waste, but also increases production costs. It has an adverse effect on the growing environment of vegetables and is not conducive to the growth of vegetables.
After many years of practice, the author has proved that the amount of vegetable trace elements required is minimal (but it is indispensable). The use of micro-fertilizer should be better off in the "micro" word. Scientific experiments show that the standard for safe use of micronutrients in vegetables is:
Ferrous sulfate. The amount of soil applied shall not exceed 3.25 kg per 667 square meters (1 mu), and the foliar spraying concentration of plants should be 0.1%-0.2%. After the application of ferrous sulfate, some organic manure fertilizers should be added to improve the soil pellet structure and promote the absorption and utilization of ferritin by vegetables.
Manganese sulfate, manganese chloride. The soil application rate is no more than 2.05 kg per 667 square meters, the soaking concentration is 0.05%-0.1%, and the foliar spray concentration is 0.05%-0.15%.
Copper sulphate. The soil application rate is no more than 2 kg per 667 square meters, the soaking concentration is 0.01%-0.05%, and the foliar spraying concentration is 0.02%-0.04%. It can be combined with the Bordeaux mixture to prevent disease. One of the main components is sulfuric acid. copper. After the spray, he treats the disease and increases the fat.
Borax, boric acid. The soil application rate is no more than 1.25 kg per 667 m2, the soaking concentration is 0.02%-0.05%, and the foliar spray concentration is 0.3%-0.5%.
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