Nitrogen fertilizer refers to the fertilizer that can provide nitrogen nutrition for plants, is the most effective fertilizer in the entire crop growth cycle, especially in the vegetative growth stage of the most prominent performance, if a word to reflect nitrogen fertilizer then it is estimated to be "wang".
<h1 class="pgc-h-arrow-right" data-track="132" > the main characteristics of nitrogen fertilizer</h1>
According to the morphology of the compound, it can be divided into ammonium nitrogen fertilizer, nitrate nitrogen fertilizer, amide nitrogen fertilizer, common ammonium nitrogen fertilizers are ammonium carbon, ammonium sulfide, ammonium chloride, ammonia; nitrate nitrogen mainly includes ammonium nitrate, sodium nitrate, calcium nitrate; amide nitrogen fertilizer mainly includes urea and lime nitrogen. At present, the nitrogen fertilizer utilization rate in our actual production is about 35%, most of which is wasted, so how to better use the characteristics of nitrogen fertilizer and the fertilizer needs of crops to better use it to improve the cost performance, and then we analyze the characteristics of several different forms of nitrogen fertilizer.
Urea granules
Ammonium nitrogen such as ammonia, ammonium sulfate, ammonium bicarbonate (gas fertilizer), ammonium chloride and the like. This kind of nitrogen fertilizer is easily soluble in water, easy to be absorbed by crops but also easy to volatilize, in this process we often say nitrification reaction and denitrification, accompanied by nitrogen loss and volatilization, especially in alkaline soil, because ammonium nitrogen is positively charged and the calcium and magnesium ions in the soil will antagonize, so it is not recommended to use with calcium and magnesium fertilizer. It should be noted here that ammonium chloride should not be used in chlorine-sensitive crops such as cabbage and tobacco; ammonium sulfate should not be used in rice fields.
Nitrate nitrogen such as ammonium nitrate, potassium nitrate and the like. This kind of nitrogen fertilizer is easily soluble in water, easy to be actively absorbed by crops, and is easily absorbed by negative charge to promote the absorption of calcium, magnesium and potassium, but it is also more easy to lose, and the nitrogen content is low.
The most commonly used amide nitrogen is the urea we use the most now. Amide nitrogen is mainly hydrolyzed under the action of urease, forming ammonium nitrogen that is absorbed by crops, and the nitrogen content is the highest among all nitrogen fertilizers. Because it has to be converted to be absorbed, the onset of efficiency is relatively slow compared to the first two nitrogen fertilizers, generally according to the difference in soil environment and temperature in about 2-10 days, but the fertilizer efficiency is relatively long, generally up to about a month.
<h1 class="pgc-h-arrow-right" data-track="122" >2, an effective way to improve nitrogen fertilizer utilization</h1>
1. Cover the soil after deep application. The depth is about 8 cm, remember not to sprinkle on the surface of the soil.
2, according to the different growth stages of crops for scientific fertilization, try to take a small number of times the principle, so as not to cause waste to affect the absorption of other elements and soil hazards.
3. Apply according to the place. For example, we can choose ammonium bicarbonate in paddy fields, and urea sulfate can be used in drylands, etc. When using urea as topdressing, it should be applied one week in advance, and it should not be watered too much.
4. When selecting nitrogen fertilizer, try to use slow-release nitrogen fertilizer and products with added plant auxin, and the effect will be better than that of the same products.
5. The application of microbial preparations containing nitrogen fixation can promote soil agglomerate structure and have the effect of nitrogen fixation phosphorus and potassium solution, and can effectively improve nitrogen fertilizer utilization rate