In the summer of 2017, the fertilizer selection technique is cheap and the fertilizer is purchased. What should you pay attention to in summer? First, choose quick results. As the temperature rises, the ability of crops to absorb nutrients is also strengthened. For the summer crops to require fertilizer, on the one hand, the fertilizer needs to be strong, that is, more fertilizer is needed. On the other hand, the soil is required to have a continuous fertilizing capacity, but in summer, the rainwater and fertilizer are seriously lost. Therefore, it is easy to quickly supplement the nutrients in a small number of ways in summer fertilization. In terms of morphological selection, it is recommended to use fast-acting nitrate nitrogen fertilizer and ammonium nitrogen fertilizer to quickly supplement nutrients for crops. The second is to select crop-specific fertilizers suitable for growth targets. For the result crops or tuber crops, summer fertilization is mainly based on quick-acting, high-nitrogen fertilizer, high-nitrogen and high-potassium, such as apple, citrus, grape, kiwi, pomegranate and other crops. For leafy crops that harvest leaves or shoots, summer fertilization should be supplemented with nitrogen fertilizer, which promotes flourishing crops, increases chlorophyll and enhances vegetative growth. How to make urea work best? To improve urea utilization, we need to start from three aspects: First, the root dressing Urea is a neutral fertilizer, which has less damage to crop leaves, is soluble in water, has strong diffusibility, and is easily absorbed by leaves. It is not easy to cause separation of the walls after entering the leaves, which is very suitable for top dressing. However, urea with a biuret content of not more than 2% should be used to prevent damage to the leaves. Generally, the amount of top dressing per urea is 0.5~1.5 kg. The spraying time is preferably carried out after 4 pm. At this time, the amount of transpiration is small, and the leaf pores are gradually opened. The diluted urea solution can be absorbed in one night, which greatly improves the utilization rate of urea. Second, early application and deep application To apply early. Urea is applied to the soil to have a transformation process that can be absorbed and utilized by the crop. Therefore, if the application of urea is the same as the application of other nitrogen fertilizers, it will delay the maximum effect period of crops on nitrogen nutrient absorption. To be deeply applied. Urea should be applied to the soil in depth, whether it is base fertilizer or top dressing. Third, it is not suitable for surface application, dip seed dressing and irrigation immediately after application. Not suitable for presentation. In particular, saline-alkali soils are less suitable for spreading on the surface. This is because ammonium carbonate, ammonium hydrogencarbonate, and ammonium hydroxide which are produced after the decomposition of urea are unstable compounds. Not suitable for dip and seed dressing. Urea contains a small amount of biuret, which is toxic to crops. Urea soaking and mixing seeds will affect seed germination and root growth of seedlings. It is not advisable to irrigate immediately after application. After the urea is applied to the soil, it is dissolved in the soil solution in a molecular state before being converted into ammonium carbonate, and is not easily adsorbed by the soil. If the water is immediately poured, the fertilizer will be lost with the water, and the water will be poured every few days after the application. This article URL: 2017 summer fertilizer purchase tips, cheap and expensive fertilizer purchase method Stainless Steel Foam Fire Extinguisher Stainless Steel Foam Fire Extinguisher,Sus 4L Foam Fire Extinguisher,Sus 6L Foam Fire Extinguisher,Stainless Steel 6L Foam Fire Extinguisher JIANGSU NEW FIRE FIGHTING TECHNOLOGY CO.,LTD , https://www.newayfire.com