It is an important technical measure to achieve high-yield wheat, and it is currently a critical period for top-dressing and joint-fertilizer. The reporter interviewed Deng Kun, the senior agronomist and director of the Agricultural Technology Promotion Center of Fuyang City, and asked him to give lectures. The topdressing technology of wheat jointing fertilizer.
Deng Kun pointed out that the application of wheat joint fertilizer to local conditions, according to "five see" to determine.
A look at the sky, to see if there is precipitation when fertilizing, it is best to use precipitation to topdressing, not only saves time and effort, but also can quickly play a fertilizer effect. Second, look at whether the soil moisture is suitable for top dressing. If the soil moisture is not good, you must bring water to top it up, otherwise it will not reach the top dressing effect. Third, look at the season, under normal circumstances, choose the first fixed inter-season wheat, that is, the application in the middle and late March, but also according to the development process of wheat flexibly. Four to see the fertilizer, with quick-acting ammonia nitrogen fertilizer for top dressing, fertilizer effect is fast, but not suitable for spreading, otherwise the fertilizer is easy to volatilize, but also easy to burn wheat leaves. Urea is used as a top dressing. Since urea must be converted into ammonia nitrogen in the soil before it can be absorbed by wheat, the top dressing time must be 2-3 days in advance. Five to see the seedlings, for the growing wheat seedlings can be less or even not. For weak wheat fields, you can fertilize more. In the fertilization method, it can be applied, or it can be applied in a string. You can apply rain or water after you apply it, but you must use water to regulate your fat so that you can use it to make your fertilizer more effective. How to grasp the amount of wheat jointing fertilizer? Deng Kun believes that according to the wheat production situation in Fuyang City, the amount of pure nitrogen in Mushi is generally between 12 and 16 kg. Calculated according to the base recovery ratio of 7:3, the amount of topdressing in normal wheat fields is about 3 to 4 kg per mu (about 6 to 8 kg of urea). Strong seedlings and wheat fields can fade 60% to 8 kg of urea per acre when the population color fades, the number of tillers decreases, and the first internode is fixed. If the leaf color does not fade during the jointing of wheat in Wangmiao wheat field, the leaves will be drape and no fertilizer or fertilizer may be applied. It is really necessary to apply jointing fertilizer, should be delayed application, the amount should be less, urea per acre 3-4 kg, such as to the leaves out of 2 when the wheat leaf color does not fade, you can not use, so as not to affect the quality of lustful late maturity. Wheat seedlings in weak seedlings have premature yellowing before the jointing of the wheat. The jointing fertilizers can be applied in advance and the amount of fertilizers should be increased appropriately. Urea 7 to 8 kg per mu can be applied. (Author: Wei Fei)