What is the function of potash fertilizer?

What is the function of potash fertilizer? Is there any way to increase the content of potash in the field? Also ask the netizens who know to help introduce that potassium is one of the three elements of fertilizer. Potassium in plants generally accounts for 0.2%-4.1% of dry matter weight, second only to nitrogen. The farming network has sorted out the effect of potash fertilizer on crops and the methods to improve the utilization rate of potash fertilizer, which are listed in detail below for netizens' reference. The role of potash fertilizer: first, potash fertilizer can improve the appearance quality of crop products: potassium can promote photosynthesis, improve photosynthetic efficiency, and promote the transport of photosynthate. When potassium is sufficient, monosaccharides are synthesized to sucrose and starch, so potassium has a good effect on the yield and quality of starch and sugar crops. Potassium can also promote the absorption and utilization of nitrogen by crops and promote protein synthesis. Therefore, the adequate supply of potassium can not only increase the yield, but also increase the protein content in the grain and improve the quality. Potassium plays a good role in improving product quality, in addition to the improvement of basic nutrients (such as protein, carbohydrates, etc.), it can also increase mineral content, improve the appearance of fruit and increase the storage resistance of fruit. Second, potassium fertilizer can enhance the stress resistance of crops, potassium application can make crops grow healthily: when potassium supply is sufficient, the root system develops well, which is beneficial to absorb water from the soil. Potassium can increase the osmotic pressure of cell fluid, maintain the elasticity of cell wall, and reduce the loss of water. Potassium also plays an important role in the regulation of stomatal opening and closing. When potassium is sufficient, water evaporation can be reduced. When potassium is sufficient, the mechanical resistance of plant cell wall thickening, stem toughness and anti-parasite penetration increases, at the same time, the number of low molecular compounds in crops decreases, and pathogens lack food sources, which prevent the development of diseases. Therefore, the role of potassium in enhancing crop disease resistance is very obvious. At the same time, potassium can also enhance the ability of crops to resist insect pests, frost damage and adverse soil environment. Methods to improve the utilization rate of potash fertilizer: first, when the same soil is applied in combination with nitrogen and phosphate fertilizer, the problem of potassium will not be prominent when the content of nitrogen and phosphorus is low, or the amount of nitrogen and phosphate fertilizer is low, and the production level is not high. With the increase of the amount of nitrogen and phosphate fertilizer and the increase of yield, the need for potash fertilizer will become increasingly obvious. The experiment shows that potash fertilizer is applied on the basis of nitrogen and phosphate fertilizer. Generally speaking, rice can increase production by about 15%. At present, in some areas, the effect of nitrogen fertilizer has a downward trend, one of the reasons is that no attention has been paid to the combined application of potassium fertilizer, and the proportion of nitrogen and potassium is out of balance. Therefore, in production practice, attention must be paid to balanced fertilization. Method 2. Apply more potassium fertilizer to cold soaked fields with poor soil environmental conditions. Due to the improvement of potassium nutrients and the enhancement of root activity, the root oxidation ability of rice is also enhanced, thus reducing the content of reducing substances in the soil. Redox potential increased, so as to prevent or reduce the harm of sulfides, organic acids and ferrous, thus conducive to the growth of rice, so the application of potassium fertilizer in cold soaked fields. Often get good results. Method 3. The effect of applying potash fertilizer to cash crops is remarkable. Cash crops are generally sensitive to potash fertilizer and need a large amount of potash fertilizer. For example, the main production of sugarcane absorbs about 40 kilograms of potassium oxide per mu and bananas absorb about 95 kilograms of potassium oxide. As a food crop, rice, 500 kilograms of rice absorbs only 10 kilograms of potassium oxide. Potash fertilizer can not only improve the yield, but also improve the product quality. the soil for the cultivation of cash crops often has a low level of potassium supply, so the development of cash crops requires the application of a large amount of potassium fertilizer. Method 4. According to crop characteristics, different varieties of potash fertilizer potassium chloride and potassium sulfate are commonly used, and sulphur potassium magnesium fertilizer has been newly imported in recent years. The price of potassium sulfate and potassium magnesium sulfate is higher than that of potassium chloride, the quantity is less, and there is no chlorine, so it should be mainly used in chlorine-avoiding crops, such as tobacco, while potassium chloride can be widely used in other crops except a few. Method 5. Pay attention to the application technology, the application amount and application period of potash fertilizer are also very important to improve the effect of potash fertilizer. Each crop has its best suitable amount of potash fertilizer, applied too much, the crop will be extravagant absorption, generally not harmful, but not economical. For most crops, potash fertilizer is better as base fertilizer, and the combination of base fertilizer and early topdressing is better for some crops. Topdressing also had an effect when the plant was obviously deficient in potassium, but the yield and quality of the crop had been obviously damaged at this time. Due to the weak adsorption capacity of clay minerals to potassium in the southern soil, coupled with the large amount of Rain Water in the south, the potash fertilizer applied is easy to be leached, and the fertilizer retention performance of sandy soil is also very weak, so separate application should be emphasized in these soils to reduce the loss of potassium. Method 6. Make the best use of organic fertilizers, especially ligusticum stalk and plant ash. China is short of potash resources, and a large amount of potash is imported. In addition to paying attention to the rational application of potash, we must also use local materials and increase the sources of potash. In areas where conditions permit, great efforts should be made to promote the return of plant ash to the field. In addition, returning Ligusticum ligusticum to the field is also an important measure to supplement potash fertilizer in conditional areas. What is polypeptide urea and what is phosphate fertilizer?