Several Methods To Avoid ''fighting'' Of Fertilizer Elements
Balanced fertilization biases or applies more simple fertilizer to crops, which not only causes fertilizer waste and increases production cost, but also easily leads to the lack of other nutrient elements. In wheat, corn, rice and other food crops, farmers often apply nitrogen fertilizer, resulting in crop growth or lodging; Due to the antagonistic effect between nitrate ion and phosphate ion, attention should be paid to increasing phosphorus fertilizer when applying nitrate nitrogen fertilizer. When crops are short of phosphorus, zinc deficiency induced by excessive application of phosphorus fertilizer is a typical antagonistic effect. In economic crops such as fruit trees and vegetables, excessive application of potassium fertilizer will often lead to crop magnesium and calcium deficiency. When applying fertilizer, it is necessary to keep the balance of nutrient elements according to the fertilizer structure of crops and the fertilizer supply capacity of soil.
Applying humic acid organic carbon fertilizer, organic carbon fertilizer is rich in organic nutrients, especially the organic small molecular water-soluble carbon that can be directly absorbed and utilized by crops. After organic carbon is applied into the soil, it can effectively improve the physical and chemical status and biological characteristics of the soil, mature the soil, enhance the soil's ability to maintain and supply fertilizer and buffer, and create good soil conditions for crop growth. At the same time, organic carbon and chemical fertilizer are applied reasonably, complement and promote each other, which is conducive to crop absorption, improve fertilizer utilization, buffer or reduce the antagonism between nutrients. Humic acid carbon bacterial fertilizer can be applied if conditions permit. Small molecular carbon and beneficial bacteria complement each other and work together.
Changing the way of fertilization, if zinc fertilizer and phosphorus fertilizer are applied together, it will inevitably produce "mutual restriction". Therefore, phosphate fertilizer should be used as base fertilizer and zinc fertilizer as topdressing to avoid the application of phosphate fertilizer and zinc fertilizer together. Nitrogen, phosphorus, potassium and other large element fertilizers should be mainly Rhizosphere Fertilization. Nitrogen and potassium fertilizer can be applied by spraying, and phosphorus fertilizer can be applied by centralized fertilization. Micro fertilizer should be sprayed on leaves and combined with root application according to the degree of deficiency; Seed dressing, seed soaking, root dipping and other methods can also be used to limit trace elements to a small range of roots and avoid contact with large elements as far as possible.
According to the soil characteristics, fertilization in sandy soil lacking potassium, nitrogen fertilizer and potassium fertilizer should be applied together, but potassium fertilizer should not be applied too much at one time, because potassium ion will also antagonize the absorption of calcium, magnesium and ammonium, which will cause calcium and magnesium deficiency in crops. Nitrogen fertilizer should not be applied too much in acid soil, otherwise it will be difficult for crops to absorb calcium ion when the concentration of ammonium ion is high; Bitter pox in some apple producing areas is calcium deficiency caused by excessive application of nitrogen fertilizer.
Improve soil by improving the physical and chemical properties of soil to build a suitable environment for crop growth. Farmers like to apply lime to acid soil to improve the soil. However, lime shall not be applied in excess or continuously. If lime is applied excessively, it may induce crop boron, magnesium and phosphorus deficiency, which often occurs in fruit trees (such as citrus and banana), vegetables (such as pepper, tomato and cucumber) and other crops (such as cotton and rape). For the poor acid red soil in South China, where conditions permit, it can be improved by applying humic acid carbon fertilizer dynamic carbon. At the same time, dynamic carbon can also improve soil organic matter, improve soil structure, activate nutrient ions and adsorb toxic metal ions. It can not only increase crop yield and quality, but also reduce nutrient leaching and improve nutrient utilization.
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