Key points of rational fertilization for planting wheat

The fertilizer requirement of wheat is greatly affected by soil properties and its own fertility, as well as different factors such as sowing date and yield, and there are also some differences among wheat varieties. Farmers should pay attention to the following points in fertilization:

First, apply more phosphate fertilizer. Wheat needs more phosphate fertilizer, and more phosphate fertilizer should be applied to the base fertilizer. It is suggested that the compound fertilizer or diammonium phosphate with high phosphorus content in the ratio of nitrogen, phosphorus and potassium should be used as the base fertilizer.

The second is to pay attention to the appropriate dosage. If diammonium phosphate is used as base fertilizer, 15-20 kg / mu can be used, and 20-25 kg / mu can be used if phosphorus-rich compound fertilizer (more than 20%) is used.

Third, the method of applying base fertilizer should be appropriate. Diammonium phosphate is placed in the fertilizer box and sown together with the seeds in the seed box. Be careful not to come into direct contact with the seeds so as not to burn the seedlings. If you use compound fertilizer, you can refer to the usage of diammonium phosphate, but the fertilizer grain shape is required to be neat, the hardness should be in line with the standard, and can not be faceted. Otherwise, the base fertilizer should be applied first, ploughed evenly and raked fine before sowing.

Fourth, to determine the amount of fertilizer application, we should refer to the crop yield of the previous crop. The yield of summer corn per mu on Ms. Li's plot is 600 kg per mu, indicating that the soil fertility is higher, which can appropriately reduce the amount of fertilizer used in wheat.

In addition, attention should be paid to the timely topdressing of wheat spring seedlings in the coming year, generally in the late jointing stage. If the sowing is late and the seedling condition is poor, it can be brought forward to the jointing stage appropriately. The first topdressing amount of urea is 15-20 kg / mu, and the second topdressing is used to see the seedling growth at that time. If the seedling condition is still not prosperous, you can top up the panicle fertilizer again in the early booting stage and use urea 7.5-10 kg / mu.

Zhang Youshan: researcher, Institute of Plant Nutrition and Resources, Municipal Academy of Agriculture and Forestry Sciences. He has been engaged in the research of soil improvement, soil survey, agricultural water saving and fertilization for a long time, and has made some achievements in soil optimized fertilization and water-saving agriculture. In the aspect of soil testing and fertilization, the rapid testing technology and equipment of soil and plant were developed, which provided technical support for later formula fertilization and recommended fertilization.