Principles of Fertilization Under drought conditions, it is necessary to appropriately reduce the total amount of fertilization, and "adjust water with fertilizer" combined with irrigation and fertilize appropriate amounts to regulate the growth and development of crops. The amount of fertilizer applied at one time should not be too large. If a large amount of fertilizer is applied at one time during a drought, it is easy to wash away the applied fertilizer when encountering heavy rain after a drought. This will not only cause economic losses to farmers, but also pollute the environment. Therefore, fertilization should be combined with irrigation in batches. Fertilizer is applied deeply, and the fertilizer is pressed with water. Under drought conditions, if only the fertilizer is applied to the surface, the fertilizer is volatile. If there is a flood and heavy rain after a drought, it is easy to be washed away by the rain. Therefore, chemical fertilizers should be applied as deeply as possible, and after application, water and pressure fertilizers should be selected to maintain fertilizer efficiency. Pay attention to the reasonable mix of fertilizers, especially potash fertilizer and boron fertilizer. It is understood that potassium ions can adjust the colloidal properties of protoplasm, so that water can smoothly enter cells, and strengthen the water-holding capacity of cells; appropriate potassium nutrition can also increase the root-shoot ratio and enhance the water absorption capacity of crops. Fertilization strategy As a large fruit tree planting area, the first feature of fruit tree fertilization in Shaanxi, Shanxi, and Gansu is the dry climate, low annual precipitation, but large evaporation. Except for some farmland with river water irrigation conditions, water shortage is the area The biggest obstacle to agricultural production. Based on this feature, experts believe that fertilization should be combined with water-saving irrigation. In addition, drought is unfavorable to the growth and development of crops and the process of crop absorption and utilization of nutrients, making fertilization less than ideal. First of all, pay attention to the combined application of organic fertilizers and chemical fertilizers. Attention should be paid when applying fertilizer: organic fertilizer should be decomposed, and non-decomposed organic fertilizer will easily cause high-temperature burning when fermented; generally, it should be used as a base fertilizer and combined with deep tillage to facilitate the integration of soil and fertilizer and effectively improve the soil; under drought conditions, soil moisture content Low, easy to cause burning seeds and seedlings, we must do a good job of separating seeds and fertilizers. Secondly, pay attention to the selection of appropriate fertilization methods. If the nitrogen and potassium fertilizers required by the fruit trees throughout the year are mixed with organic fertilizers and then applied at one time, this is not the peak period for the absorption of nitrogen and potassium by the fruit trees. The nitrogen and potassium applied are excessive for the fruit trees. Inorganic nutrients that are incapable will inevitably be fixed or lost in the soil. In the second year, there will be insufficient nitrogen or potassium during the peak period of nitrogen or potassium demand of fruit trees. Therefore, it is necessary to pay attention to adding a controlled release agent when applying nitrogen fertilizer, and if it catches up with rain during the top dressing period, it should be properly supplemented with top dressing. Fertilization technology Experts believe that to achieve accurate and scientific formula fertilization, it is necessary to master the five parameters of target yield, fruit tree fertilizer requirement, soil fertilizer amount, fertilizer utilization rate and effective nutrient content in fertilizer, which are the basis of formula fertilization. The first is the target output of fruit tree crops. The reasonable target output of the year is determined according to the comprehensive factors of tree species, species, tree age, tree vigor, flower buds, climate, soil, and cultivation management. The second is the amount of fertilizer required by fruit trees. Fruit trees need to absorb a certain amount of nutrients during the annual cycle to form a self-integrated organization. The third is the amount of soil fertilizer. The content of mineral elements in the soil is quite rich. However, if no fertilizer is applied for a long time, fruit trees will grow poorly. This is due to the fact that most of the mineral elements in the soil cannot exist in a free state and the roots cannot absorb and utilize them. The natural supply of three elements in the soil is roughly as follows: the natural supply of nitrogen is about 1/3 of the absorption of nitrogen, phosphorus is 1/2 of the absorption, and potassium is 1/2 of the absorption. The fourth is the fertilizer utilization rate. The fertilizer applied to the soil cannot be completely absorbed and utilized by fruit trees due to the adsorption, fixation, leaching and decomposing and volatilization of the soil. The utilization rate of fertilizer by fruit trees depends on the tree species and varieties. , Rootstocks, and soil management systems. The fifth is the effective nutrient content in the fertilizer. In formula fertilization, the effective nutrient content in the fertilizer is an important parameter. Commonly used organic fertilizers and mineral fertilizers have effective nutrient content such as urea which contains 46% nitrogen, potassium sulfate contains 48% to 52% potassium, ammonium phosphate contains 17% nitrogen and 47% phosphorus, and potassium dihydrogen phosphate contains 52% phosphorus. Others such as borax contains 11.3% boron, potassium sulfate contains 23%-25% zinc, and ferrous sulfate contains 19%-29% iron. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone
Beauty ingredients, Matrixyl 3000 To the Skin,Alpha Lipoic Acid and Levothyroxine,Potassium 4-methoxysalicylate Price,Factory Tripeptide-32 Powder, We are manufacturer of Skin Whitening in China, if you want to buy Kojic Acid Dipalmitate Powder,Ethyl Ascorbyl Powder,Tranexamic Acid Powder please contact us.
Beauty ingredients, Matrixyl 3000 To the Skin,Alpha Lipoic Acid and Levothyroxine,Potassium 4-methoxysalicylate Price,Factory Tripeptide-32 Powder Xi'an Henrikang Biotech Co.,Ltd , https://www.henruikangbio.com
Custom Kojic Acid Powder and its derivatives, such as acetate, have certain Antibacterial properties, no one-time and cumulative irritation to the skin, and can be used as cosmetics and food Preservatives. Strong UV absorption, can be used alone or with a variety of sunscreen products such as soap. It can treat and prevent the formation of skin spots such as liver spots, and the effect is obvious at 1% ~ 2.5%. Helps to retain moisture and reduce skin wrinkles.For Anti-Wrinkle Products, Copper Peptide Ahk-cu Powder and Copper Peptide Ahk-cu Powder are very popular, widely used in cosmetics and hair care products. These products can accomplish the functions of Skin Whitening, skin lightening, anti-winkle, etc. There is a great industry behind cosmetics.