The correct use of trace fertilizer is one of the key measures to promote the high quality and high yield of vegetables. Therefore, many vegetable farmers attach importance to the application of trace fertilizer. However, many farmers in the production of excessive application of trace fertilizer is more common, and some even more than several times the amount of safety, This brings a series of side effects, which not only causes serious waste, increases production costs, but also produces toxic effects on vegetables. The soil environment is not good and is not conducive to the growth of vegetables. Practice has proved that vegetables need minimal halo for trace elements (but essential), and use micronutrients to make good use of “microâ€. Scientific experiments show that the standard for safe use of micronutrients in vegetables is as follows: The application amount of ferrous sulfate in soil is not more than 3.25 kg per mu, and the spray concentration of plants is 0.1%-0.2%. After the application of ferrous sulfate, it is necessary to apply more quality farmhouse fertilizer to improve the soil, in order to promote the absorption and role of ferritin in vegetables. Manganese sulfate, manganese chloride soil application no more than 2.05 kg per mu, soaking concentration of 0.05-0.1%, foliar spray concentration of 0.05-0.15%. Copper sulfate soil application rate does not exceed 2 kg per mu, soaking concentration is 0.01-0.05%, foliar spray concentration is 0.02-0.04%. Can generally be combined with disease prevention Bordeaux spray, one of the main ingredients is copper sulfate. After the spray, he treats the disease and increases the fat. The application amount of borax and boric acid in soil shall not exceed 1.25 kg per mu, the soaking concentration shall be 0.02%-0.05%, and the foliar spraying shall be 0.3-0.5%.
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