1. When using urea to topdress dry crops, the best way is to apply it in furrow or hole to 10 cm in the soil, which is conducive to the timely transformation of urea and the absorption of crops. 2. Urea is a neutral fertilizer, do not mix it with alkaline fertilizer when top dressing, so as not to reduce fertilizer efficiency. 3. The nitrogen content of urea is high, about 45%, so the application amount should not be too large to avoid fertilizer damage. Generally, 520 kg per mu is applied, and 1520 kg per mu for paddy fields. If it is applied too much, it cannot be absorbed by the soil before it is converted into ammonium bicarbonate, it is easily leached out by rain, and it is easy to damage crops. If it cannot be absorbed by crops in time, it will seep into the ground along with groundwater, causing water pollution. 4. Urea is the most effective foliar fertilizer among all nitrogen fertilizers. When urea is sprayed, the amount and rate of protein synthesis by crops are higher than other nitrogen fertilizers. However, the spraying concentration should not be too large, otherwise it will cause phytotoxicity such as burning leaves. Generally, 2% is appropriate for corn, wheat, rice, and cotton; 0.5% to 1% for vegetables and fruits are appropriate; 0.5% to 1.5% for fruit trees. 5. The timing of using urea is usually used in the early stage of crop growth. This is because urea contains high nitrogen elements, and the early stage of crop growth requires more nitrogen, which is beneficial to crop growth. However, if urea is used in the later stage of the crop, the crop will be greedy and late. Conducive to crop maturity. 6. Urea is mainly composed of nitrogen, and crop growth requires a variety of nutrients. Therefore, urea can be used as top dressing, but it should be used in conjunction with other compound fertilizers and organic fertilizers, which can greatly improve fertilizer utilization. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone Vegetable Powder,green vegetable powder,dehydrated vegetable powder,Natural Vegetable Powder,bloom vegetable powder Shaanxi Zhongyi Kangjian Biotechnology Co.,Ltd , https://www.zhongyibiotech.com
How to improve the utilization rate of urea
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