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Spraying time: Foliar fertilization in the middle and late stages of wheat is easy to choose after no windy cloudy days or sunny days before 10 am, after 4 pm. The temperature is high at noon and should not be sprayed. .
Fertilizer concentration: It can be selected according to the growth condition of wheat. The suitable concentration is urea 1%, and potassium dihydrogen phosphate is 0.1%. Reasonable spraying: liquid surface fertilizer mixing spray, not only saves labor and time, but also improves fertilizer efficiency. Such as nitrogen, phosphorus and fertilizer mixed spray; nitrogen, phosphorus, potassium and trace element fertilizer mixed spray; fertilizer and regulator or in line with nutrient mixing spray, etc., its fertilizer efficiency and yield increase are better than single spray. After mixing the mixture, it should be sprayed in time to prevent loss of fertilizer efficiency. In the fertilizer solution, the corresponding pesticides can be added according to the occurrence of pests and diseases, and the fertilizers and drugs can be mixed. For example, in the prevention and control of wheat spikes, 60 kg of mixed liquid per acre can be used (1% urea, + potassium dihydrogen phosphate 0.1). The method of %+ Tianfengsu 16 ml + Dimethoate 120 ml) can achieve the purpose of both fertilization and pest control.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
Main points of fertilization techniques in wheat in the middle and late stages
In the middle and late stages of wheat growth, the amount of fertilizer needed is large, and soil fertility is often difficult to meet. Especially in the late growth stage of wheat, the roots are senescent, the absorption function is weakened, and the fertilizer is less absorbed from the soil. If the leaf fertilization is not carried out in time, it will cause premature aging and affect the yield. . The foliar fertilization method is simple and the fertilizer efficiency is rapid, which is an important measure to ensure high yield and quality of wheat.
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