A taboo nitrogen fertilizer shallow application. Because the nitrogen fertilizer is applied in the shallow layer, it is easy to decompose and volatilize nitrogen after being exposed to sunlight, among which the ammonium bicarbonate is especially volatile. Therefore, we must change the habit of surface application and take a deep-seated approach to prevent the volatilization of nitrogen.
Second bogey single fertilizer. Single application of chemical fertilizers will result in the destruction of the soil aggregate structure, harden the texture, cause the soil to become acid or alkali, and seriously destroy its physical and chemical properties. Moreover, single application of chemical fertilizers will also affect the breeding activities of soil beneficial microorganisms and reduce soil activity. Do inorganic and organic fertilizer application.
3. Avoid application of ammonium bicarbonate in greenhouses or greenhouses. Ammonium bicarbonate is called “gas fertilizer†and it is applied in high temperature and closed environment in greenhouses and greenhouses. It is easily decomposed into ammonia gas and volatilizes. The amount of volatilization is large, which can cause ammonia to smoke the plants and hinder normal growth.
4. Avoid excessive application of high-concentration fertilizers. If the nitrogen content of urea is as high as 46%, if the application dose is too large and the concentration is too high, the root system of the crop will appear to "suck down", resulting in damage to the roots and death of rotten roots. For high-concentration chemical fertilizers, it is necessary to implement the principles of fertilization with less food and more meals.
Five bogey regardless of the nature of fertilizers, chaos mixed with two kinds of fertilizer. For example, some “ammonia nitrogen†fertilizers should not be mixed with alkaline fertilizers. Otherwise, acid and alkali neutralization will not only accelerate the nitrogen volatilization, but also result in the formation of soil compaction.
Six bogeys excessive application of nitrogen fertilizer on leguminous crops. Legumes such as soybeans, peanuts and mungbeans have nitrogen-fixing rhizobia in their roots. If nitrogen fertilizer is used excessively, it will directly impair the nitrogen-fixing activity of rhizobia and inhibit the activity of rhizobia, thereby reducing its nitrogen fixation efficiency. If the soil for planting leguminous crops is extremely deficient in nitrogen fertilizer, a small amount of nitrogen fertilizer can be applied in combination with phosphorus fertilizer, and balanced fertilization effects can be received.
Seven bogey chlorinated fertilizers are applied to sensitive crops. Such as potatoes, grapes and other crops, are very sensitive to chlorinated fertilizers, and avoid allocating too much chlorine fertilizer to such crops at one time.
Eight bogey or surface application of phosphorus fertilizer. Phosphorus has little mobility in the soil, and shallow application (sprinkling, surface application) makes phosphorus stay on the surface, cannot reach the deep layer of the soil, and cannot be absorbed by crop roots, thereby greatly reducing the fertilizer efficiency of phosphorus application.
Nine bogey summer afternoon noon spraying fertilizer. Because the summer and sunny temperatures are high at noon, if the roots are sprayed at this time, not only the fertilizers evaporate quickly, but also the fertilizer on the young branches and leaves will burn the crops, which will waste fertilizer and hinder the normal growth of the crops. Should be in the hot morning or early evening.
Ten bogey before heavy rain. Precipitation or rainfall before the onset of fertilization, can easily be washed away, in particular, water-soluble urea, superphosphate and other nitrogen, phosphate fertilizer, not to be applied before heavy rainstorms.
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