The nutrients needed for various crops are not the same, but the characteristics of different varieties of fertilizers are also different. According to the fertilizer absorption characteristics of crops and the appropriate application of chemical fertilizers to the soil properties, not only can the fertilizer effect be fully utilized, but also the production cost can be reduced and high yields can be obtained. First, the response of different crops to nitrogen fertilizer In order to reduce the leaching of nitrogen fertilizers, ammonium nitrogen fertilizer should be used for cultivated rice, especially ammonium chloride and urea. Corn, wheat and other cereal crops are equally effective with ammonium nitrogen fertilizers (such as ammonium bicarbonate, ammonium sulfate, ammonium chloride, urea) or nitrate nitrogen fertilizers (such as ammonium nitrate). Potato and sweet potato are also suitable for ammonium nitrogen fertilizer. Ammonium nitrate can improve the quality of tobacco, and ammonium nitrogen can help the flammability of tobacco. Chlorine-containing fertilizers (such as ammonium chloride), however, reduce the flammability of tobacco and should be avoided. In addition, different crops have different requirements for nitrogen. Leafy crops such as leafy vegetables and tea leaves require more nitrogen fertilizer for crops to be harvested. Legume crops only need to apply a small amount of nitrogen fertilizer when the root nodule has not functioned in the early stages of childbirth. In southern China, high temperature and rain, the application of ammonium nitrogen fertilizer can reduce leaching loss, and the southern soil is mostly acidic. It is better to use chemical alkalinity or physiological basic nitrogen fertilizer. In the saline-alkaline soil areas, it is not appropriate to purchase ammonium chloride containing more chloride ions in order to avoid increasing soil salinity. In alkaline soils, ammonium nitrate fertilizers are absorbed and utilized by crops, but attention should be paid to prevent ammonium nitrogen from decomposing and evaporating. Second, the response of different crops to phosphorus Legume crops (soybeans, peanuts), sugar crops (beet, sugar cane), fiber crops, potato crops (potatoes, sweet potatoes), and melons and fruit trees require more phosphorus, and the application of phosphate fertilizers has a better fertilizer effect. General calcium phosphate and heavy superphosphate are water-soluble phosphate fertilizers, which are easily absorbed and utilized by crops. "Heavy calcium" has a higher content of available phosphorus, which is 2 to 3 times that of "precursor calcium". The amount of heavy calcium can be reduced by referring to the amount of "precursor calcium". Seasonal crops can only absorb and utilize a small part of the applied P fertilizer. Most of them are left in the soil, and they can also show an increase in yield for the crops under the crop. Therefore, it is not necessary to apply phosphate fertilizers in successive years in plots where there is a large amount of phosphorus, so as to avoid waste. Third, the response of different crops to potash fertilizer All crops containing more carbohydrates, such as tobacco, potatoes, sweet potatoes, sugar beets, watermelons, fruit trees, etc., require large quantities of potassium, so they are said to be hi potassium crops. However, these potassium-promoting crops are free from chlorine. If potassium chloride is applied to these potassium-salt boiled crops, chloride ions will inevitably lead to a drop in yield and quality. Potassium chloride is also not suitable for long-term application on saline-alkali land. Base fertilizers and topdressing can be used on non-chlorinated crops, but it is not suitable for seed fertilizers. Potassium sulfate is suitable for all kinds of soil and crops and can be used as base fertilizer, seed fertilizer, topdressing fertilizer and top dressing fertilizer. IV. Reactions of Sulfur, Sodium, Chlorine, Molybdenum and Boron to Different Crops Potatoes, soybeans, peanuts, and oilseeds are also sulfur-loving crops. The effect of using calcium sulphate is better than that of “heavy calcium,†because calcium sulphate does not contain calcium sulphate. Sweet Lai is a hi sodium crop, and sodium nitrate is a good fertilizer for sweet Lai. Ammonium chloride contains up to 61% chlorine. The chlorine-inappropriate crops (leaves, potatoes, sugarcane, beets, fruits, tea, oranges, grapes, etc.) are banned, but are suitable for crops such as cotton and hemp, because chlorine can increase fiber content. Toughness and pull. Molybdenum fertilizer has significant effects on leguminous crops, cauliflower, rape and other cruciferous crops. Rapeseed, cotton, peanuts, and fruit trees are boron-loving crops, which are very sensitive to boron. Boron deficiency will lead to unreal flowers, which will seriously affect crop yields. Fifth, the special response of rice to silicon Silicon is known as the fourth most important nutrient element of rice. Applying silicon fertilizer can not only improve the plant height, effective panicles, grains per spike, 1000-grain weight and other biological traits of rice, but also the application of silicon fertilizer can promote the growth of rice stalks and stalks. The yellow kernel weight enhances the ability of drought resistance and pest resistance, increases the utilization rate of nitrogen in late stage of rice, accelerates nitrogen transport accumulation, and promotes early maturation of rice. In particular, the effect is even more pronounced when applied to new paddy fields and acidic soils. Can be used in the base fertilizer, the use of calcium and magnesium silicate do silicon fertilizer and other fertilizers mixed application. Real Time Pcr,Pcr Medical Equipment,Pcr System Dna Analysis,Family Real Time Pcr System Jiangsu Dinai Bioengineering Co.,ltd. , https://www.dinaipcr.com