Since organic fertilizers cannot be absorbed and utilized by crops immediately after being applied to the soil, in order to meet the needs of vegetable growth and cultivate strong trees, it is necessary to apply appropriate quick-acting chemical fertilizers in the base fertilizer. However, many vegetable farmers have misunderstandings in the process of chemical fertilizer application: 1. A large amount of nitrate nitrogen fertilizer is used in the base fertilizer.
At present, there are three main types of nitrogen fertilizers we use, namely ammonium nitrogen fertilizers (such as ammonium bicarbonate, ammonium sulfate, etc.), amide nitrogen fertilizers (urea, etc.) and nitrate nitrogen fertilizers (such as potassium nitrate, calcium nitrate, etc.). Ammonia nitrogen fertilizer and amide nitrogen fertilizer generally cannot be directly absorbed and utilized by vegetables, but can be absorbed by vegetables after they are converted into nitrate nitrogen by microorganisms. Ammonia nitrogen fertilizer and amide nitrogen fertilizer will be adsorbed by the soil when they exist in the soil, and they will lose less with water, so they are suitable for base fertilizer.
Ammonia nitrogen fertilizer is easy to decompose at high temperature and release ammonia gas, which leads to the loss of nutrients. Therefore, it is not suitable to apply before the high temperature and stuffy shed. When applying, be sure to mix the ammonium nitrogen fertilizer with organic fertilizer and turn it deeply into the soil. It is beneficial to improve the utilization rate of ammonium nitrogen fertilizer. 2. Excessive application of phosphate fertilizer
In the early stage of plants, there is a large demand for phosphate fertilizer, and phosphate fertilizer is easily fixed by the soil, so that the effect of applying it in the base fertilizer is the best.
Vegetable farmers do not need to use phosphate fertilizer after applying a large amount of manure, but when using straw and rice husk manure as a base fertilizer, they can supplement a small amount of phosphate fertilizer appropriately. Organic acids decomposed by organic fertilizers can improve the solubility of phosphate fertilizers, thereby increasing the utilization rate of phosphate fertilizers. It is recommended that vegetable farmers apply phosphate fertilizers and organic fertilizers to the soil. 3. Micro-fertilizers are either not used or seriously exceeded
After years of vegetable cultivation, more and more vegetable farmers have realized the importance of micro-fertilizers and paid attention to the supplement of trace elements.
In fact, vegetables have very little demand for micro-fertilizers, so they must be applied in appropriate amounts. It is recommended that vegetable farmers use the following two methods: most of the micro-fertilizers are soluble. After the base fertilizer is spread, the vegetable farmers can spray the dissolved micro-fertilizer solution on the organic fertilizer on the ground, and plow into the soil together with the base fertilizer; or The micro-fertilizer is dissolved in the bucket and flushed with water when watering.
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