The Latest Methods and Precautions for Topdressing Wheat in Spring
After wheat goes through the overwintering period and enters spring, temperatures gradually rise and the wheat begins to enter the greening stage, which is a critical period for spring management of wheat. The management of the greening and jointing stages of wheat is extremely important for subsequent ear formation, and fertilization is the top priority in spring management, so how should wheat be topdressed in spring? Let's take a look together.
1. According to the growth of the wheat seedlings
After going through a winter, the growth of wheat seedlings in different regions and different plots has become somewhat different. If the wheat seedlings are light green in color and no missing application phenomenon has occurred, generally less nitrogen fertilizer can be applied, or topdressing can be done a little later, generally 8-10 kg per mu. If the wheat seedlings are growing poorly, the plants have few tillers, and the leaves turn yellow at night due to frost damage, then more nitrogen fertilizer can be applied appropriately, with 15-20 kg of urea per mu, and at the same time 5 kg each of superphosphate and potassium chloride can be used together, on the one hand to stimulate wheat greening, and on the other hand to increase the ear-bearing rate of tillers.
2. According to soil fertility
Different plots have different soil fertility, which can be seen from the growth of wheat. If it is a plot with relatively good soil fertility, sufficient basal fertilizer was applied before sowing wheat, plus organic fertilizer was applied, or soil testing and formula fertilization was used, then the wheat grows well and is safe, and less nitrogen fertilizer can be applied in spring, generally 8-10 kg per mu. If it is a plot with relatively poor soil fertility, insufficient basal fertilizer was applied, and the wheat grows poorly with weak and yellow seedlings, then such a plot should be fertilized more, with 20 kg of urea per mu, and 8-10 kg each of superphosphate and potassium chloride, so as to meet the nutrient needs for the subsequent growth of wheat.
3. Precautions
When topdressing, it is recommended to choose a clear sunny day, and the time can be around noon. However, some farmers choose to topdress before rain. According to the weather forecast, they broadcast urea in the wheat field before rainfall. Doing so will greatly reduce the fertilizer utilization rate, so special attention is needed. If the wheat field has irrigation conditions, after topdressing, it can be watered appropriately. On the one hand, this is to supplement water, and on the other hand, it is not conducive to fertilizer absorption. Do not use flood irrigation for a long time; an appropriate amount of water is enough. For wheat fields without irrigation conditions, broadcasting is not recommended during topdressing. A deep application method can be adopted, generally at a depth of about 5-6 cm. After fertilization, remember to cover the soil promptly to improve the fertilizer utilization rate. Topdressing must not be excessive, otherwise it will have the opposite effect. On the one hand, it will cause fertilizer damage, and on the other hand, it will increase costs without achieving a yield increase effect.
The above is an introduction to the methods and precautions for topdressing wheat in spring. I hope it can help you. If you want to learn more related knowledge, please follow us.