Nitrogen fertilizer is a kind of fertilizer. It is the main fertilizer that promotes the growth of flower roots, stems and leaves. The nitrogen contained in it plays a very important role in crop growth. Many friends have asked: what kind of fertilizer is nitrogen fertilizer? What is the effect of nitrogen fertilizer on plants? The following editor will take everyone to find out.
What kind of fertilizer is nitrogen fertilizer?
Nitrogen fertilizer refers to a unit fertilizer that uses nitrogen as the main component and is applied to the soil to provide plant nitrogen nutrients. It is also the fertilizer variety with the largest amount of fertilizer production and use in the world. According to the nitrogen group, it can be divided into ammonia nitrogen fertilizer, nitrate nitrogen fertilizer, ammonium nitrate nitrogen fertilizer, cyanamide nitrogen fertilizer and amide nitrogen fertilizer.
The effect of nitrogen fertilizer on plants.
Nitrogen fertilizer is a chemical fertilizer containing nitrogen, which is the nutrient element of crops. The main function of nitrogen fertilizer is to increase the total biomass and economic output; improve the nutritional value of agricultural products, especially increase the protein content in seeds, and increase the nutritional value of food.
Nitrogen is the main component of protein in crops. Without nitrogen, nitrogen and white matter cannot be formed, and without protein, there cannot be various life phenomena. In the body of crops, the parts with more protein (such as seeds) also contain more nitrogen; the parts with less protein (such as senescent stems) also contain less nitrogen. Not only that, nitrogen is also a component of chlorophyll and many enzymes. Chlorophyll is an essential material for photosynthesis of crops, and enzymes are catalysts for the transformation of various substances in crops. Nuclear proteins and plant alkaloids also contain nitrogen. It can be seen that nitrogen plays an extremely important role in crop nutrition. Crops begin to absorb nitrogen after the first true leaves appear.
When the application of nitrogen fertilizer is insufficient, the crops generally show: short and thin plants; yellow-green, yellow-orange and other abnormal green leaves; the base leaves gradually dry and wither; the root system has few branches; the tillers of cereal crops are significantly reduced, even no tillers, young The panicle differentiation is poor, the branches are few, the panicle shape is small, the crop is significantly premature aging and mature, and the yield is reduced.
When excessive nitrogen fertilizer is applied, crops generally show that they grow too luxuriantly, axillary buds are constantly born, and there are often too many tillers, which hinder the normal development of reproductive organs and delay maturity. The leaves are dark green, the stems and leaves are tender and juicy, and soluble non-protein nitrogen If the content is too high, it is easy to be damaged by diseases and insects, and it is easy to fall over. The grains of cereal crops are not full (low thousand-grain weight), and there are many unrefined grains, and crop yields are reduced.
The most commonly used nitrogen fertilizer is urea. Urea is an organic nitrogen fertilizer. After being hydrolyzed into ammonium carbonate or ammonium bicarbonate by the urease reaction in the soil, it can be absorbed and utilized by crops. Therefore, urea should be applied 4-8 days before the crop's fertilization period. At the same time, the soil must be deeply applied. The final product of urea decomposition in the soil is ammonium carbonate. Ammonium carbonate is very unstable. It decomposes in the soil or the soil surface to form free ammonia, which is easy to volatilize. Like other nitrogen fertilizers, urea should be applied in the morning or evening, preferably after rain or cloudy days. Avoid applying it at noon on sunny days. Urea is a unit fertilizer, and it should be used in conjunction with phosphate fertilizer or other chemical fertilizers. This can not only meet the needs of crops for various nutrients, but also play a role in assisting fertilizers.