Urea is a double carbon enzymes in the urea production process Sword dual enzyme and enzyme polycarbonate, this product is Professor Sun Liwen national patent formula, has the following characteristics: 1. fill enzyme disease prevention, improve plants by the enzyme N ratio, improving nitrogen conversion rate, reduce cropping and Wilt disease occurrence. 2. gather carbon dioxide, improving photosynthesis, polycarbonate enzyme can gather carbon dioxide, reducing the occurrence of disease pests. Especially the lack of closure to the issue of carbon dioxide have a good cure effect. 3. catalytic nutrients, promote early, nitrogen use efficiency increased by 30%, and to prevent greed green late. 4. increase production, promote early, improving quality, limited long-term control and quick release nitrogen combined Quefei prevent premature aging. Dosage: 1, widely used in the field and the world of fruits and vegetables. 2, and the general use of urea as may be appropriate reductions.