There is an art to applying chemical fertilizer: keep these five "don'ts" firmly in mind

Don't apply nitrogen fertilizer shallowly, because if nitrogen fertilizer is applied in a shallow layer, exposure to sunlight easily causes the nitrogen to break down and volatilize, with ammonium bicarbonate being especially prone to volatilization. Therefore, change the habit of broadcasting it on the surface and instead adopt the method of opening furrows and burying it deeply, to prevent nitrogen volatilization.

Don't apply only one kind of chemical fertilizer, because applying only one kind of chemical fertilizer destroys the soil's aggregate structure, causing the texture to harden, the soil to become acidic or alkaline, and the soil's physical and chemical properties to be severely damaged. Moreover, applying only one kind of chemical fertilizer also affects the reproduction and activity of beneficial soil microorganisms, thereby making the soil barren. So apply fertilizer with a reasonable formula and mix in organic fertilizer.

Don't apply ammonia water and ammonium bicarbonate in a greenhouse or plastic tunnel, because the greenhouse ecological environment is in a high-temperature state and a closed growing environment; these two fertilizers volatilize very easily under high-temperature, sealed conditions. The higher the temperature, the faster the "ammonia" volatilizes and the greater the amount volatilized, which will cause ammonia gas to scorch the plants and affect the normal growth of the crops.

Don't apply too much high-concentration fertilizer at one time. Whether it is nitrogen fertilizer or organic fertilizer, do not apply too much or too concentrated a dose at one time. For example, urea has a nitrogen content as high as 46%. If a single dose is too large and the concentration too high, it will cause the crop roots to show a "reverse absorption" phenomenon, damaging the roots, until root rot and death occur. So grasp the fertilization principle of "small amounts, more frequent meals," applying steadily and skillfully.

Don't arbitrarily mix two fertilizers and apply them without regard to the nature of the fertilizers. For example, for some "ammonium nitrogen" fertilizers, never mix and apply them with alkaline fertilizers such as plant ash, lime, and phosphate fertilizer; ammonium bicarbonate must also never be mixed with human feces and urine. If the two are mixed, it will inevitably accelerate the volatilization of nitrogen, and the loss of fertilizer efficiency will be even more severe.