The application method of water-flooding is also called “flushing and fertilizingâ€, and generally provides a top dressing supplement supplement during the rapid growth period of crops. Because this method is convenient and fast, it is widely used in vegetable fields and irrigated land for growing cash crops and special food crops. In order to better exert the fertilizer effect of “flushing and fertilizingâ€, the application principles are as follows:
First, the technical essentials of "rushing fertilization" application 1, the correct choice of fertilizer type of fertilization only water-soluble fertilizer can be applied with water. Urea, ammonia, ammonium sulfate and ammonium nitrate are commonly used in nitrogen fertilizer; potassium chloride and potassium sulfate are used in potassium fertilizer, and potassium nitrate is also used. In the phosphate fertilizer, even the water-soluble phosphorus monoammonium and phosphorus diammonium should not be applied, because the phosphate fertilizer has poor mobility and is easily fixed, and cannot penetrate into the root layer with water. The best application method of phosphate fertilizer can only be layered into the soil to improve its utilization.
2, the single nutrient content of the fertilization must be streamlined. In the high-yield vegetable planting, the amount of pure nitrogen should be controlled at 2-3 kg/mu, especially the nitrate nitrogen should be controlled below 2-3 kg/mu. The limited amount of potassium fertilizer (potassium oxide) is generally 2-4 kg/mu; otherwise, the waste and loss of nutrients are large. It not only reduces the utilization rate of nitrogen fertilizer, but also may cause pollution to water quality. The fertilization of the whole growth period is generally 2 times.
3. During the period of heavy fertilization, if the vegetables are in the fruit-harvesting period and picking melons and fruits, if the vegetables are in the fruit-filling period, in the autumn cabbage cultivation, the temperature will be selected and the soil mineralization will decrease. Vegetable crops are also suitable for a large number of growing seasons.
4, the control of irrigation amount Under the irrigation mode to prevent flooding of large water, when the canal irrigation, the depth of the ditch is appropriate with the amount of water to prevent the nutrients dissolved in the water from being lost with water.
Second, pay attention to the method of fertilization should be used in moderation, mainly for intensive vegetable cultivation in the top dressing, mainly applied nitrogen and potassium.
There are four kinds of fertilizers that do not apply, one does not apply phosphorus; two do not apply granular compound fertilizer; three do not flush solid organic fertilizer; four do not flush microbial preparations or fertilizer.
Feicheng Agricultural Bureau Zhao Xuening
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1. Product introduction
Coal-based solvent recovery column Activated Carbon with high quality anthracite as raw material. By strict material selection and rigorous process, adopting the advanced technology and high temperature activation made. Its appearance is black columnar, the characters are tasteless, non-toxic, high mechanical strength, developed pore structure, large surface area, the pore size is between coconut shell activated carbon and wood activated carbon, high adsorption speed, high adsorption capacity, easy regeneration. It is a kind of durable environmental protection activated carbon.
2. Application
Solvent recovery column activated carbon is mainly used in printing and dyeing industry, and is mainly used for benzene, toluene, xylene, gasoline, alcohol, ether, chloroform, carbon tetrachloride, recovery of formaldehyde and other organic solvents; and the recovery of the hydrocarbons and steam, easy desorption, high wear resistance strength, long-term use is not broken, not pulverization. The product can reach recovered completely and standardized discharge effect.
3. Transportation and Packing
Woven bag, lined with plastic film bags, each 25kg can also be packaged according to customer demand. The product should be placed in a cool and dry place during storage; When transportation, it prevents to mixed with hard materials, to prevent carbon particles broken that affecting the quality of packaging, to prevent breakage. To avoid leakage or mixed with debris; to avoid water, oil and fire.
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