As we all know, vegetables are hi lush and fertile crops. In production practice, improper fertilization is often caused, causing nitrates to contaminate the edible parts of groundwater and vegetables. In many large and medium-sized cities, more than 80% of the vegetables exceed nitrate standards. Nitrate is converted to nitrite under reducing conditions, often causing human hypoxic intoxication. In addition, nitrites and the natural substances in the human body and the human body's gastrointestinal synthesis of carcinogens - nitrosamines, often lead to gastric cancer, esophageal cancer. Since more than 80% of the nitrate that the human body ingests comes from vegetables, people have become more and more concerned about the problem of excessive nitrate content in vegetables. Therefore, in the soilless substrate cultivation, the application of organic fertilizers instead of all fertilizers formulated into nutrient solution to irrigate crops has attracted attention and has become productive, and will certainly develop at a faster rate. Natural Cosmetics Ingredient,Skin Whitening Alpha-Arbutin,Undecylenoyl Phenylalanine Powder,Tranexamic Acid XI'AN PLANT BIO-ENGINEERING CO.,LTD , https://www.plantbic.com