Four types of fertilizers and preventive measures for crops
The dehydration type of fertilizer is mainly caused by excessive application of chemical fertilizer at one time, or insufficient soil moisture. After fertilization, the concentration of fertilizer solution in the soil is too large, causing reverse osmosis of water in crop cells, resulting in dehydration of crops. The plants that are affected by the fertilizer show wilting, and they seem to be affected by frost or boiling water. Lightness affects growth and development, and the whole plant died. Prevention: Each application should not be too large, and it can be applied with water when it is dry. The smog-type fertilizer is mainly applied with ammonia, ammonium bicarbonate and other fertilizers. Such fertilizers are applied at high temperatures, which are prone to produce a large amount of ammonia gas, causing damage to crops, and lighter yellowing of the lower tip, affecting growth and development. The heavy ones caused the whole plant to die. Prevention: This type of fertilizer should be avoided at high temperatures. Burning seed type fertilizer application of fertilizer is too large, or with ferric calcium phosphate, ammonium bicarbonate, urea, lime nitrogen and other chemical fertilizers, often burning, resulting in lack of seedlings. Prevention: The amount of fertilizer should not be too large, and no seed dressing such as superphosphate, ammonium bicarbonate, urea or lime nitrogen. Toxic fertilizers Some fertilizers, such as lime nitrogen, must be subjected to a series of transformations to be absorbed by plants after they are applied to the soil, but some toxic substances will be produced during the transformation process to poison the crops, causing them to be killed or killed. Prevention: The application amount should be strictly controlled when applying fertilizer, and the fertilizer should be applied safely and rationally. Venous cannula is also a deep venous puncture catheter. The method is to select the appropriate puncture site and insert the needle under the skin, and insert the needle with negative pressure until the dark red blood is absorbed, indicating that the needle has entered the vein, and the guide wire is inserted. Withdraw the puncture needle to leave the guide wire in the blood vessel, and then insert the venous catheter that needs to be indwelled along the guide wire, then exit the guide wire, inject diluted heparin saline and fix the catheter, the deep venous catheterization is completed. The veins for puncture and catheterization are usually selected clinically, including the subclavian vein, internal jugular vein, and femoral vein. After the puncture catheter is indwelled, attention must be paid to the care of the puncture site to avoid infection with thrombus or catheter falling off. venous cannulation,best veins for cannulation,venous cannulation set,venous cannulation technique Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yongyue-tube.com