Growth characteristics of winter wheat? How to fertilize? How many three-element nutrients do you need during the growing period?

Wheat is one of the main food crops in China, and its planting area is second only to rice, and it is planted in both north and south of China. Planting is also divided into winter wheat and spring wheat. So what are the growth characteristics of winter wheat? How to fertilize at different growth stages? In view of these problems, today I will talk about the characteristics of winter wheat and fertilization management in each growth period.

First, the growth characteristics of winter wheat

Winter wheat is mainly planted in most parts of China, and the growth period of winter wheat is longer, about 120 days in South China and more than 260 days in North China.

The life of wheat can be divided into seven growth stages: emergence, tillering, jointing, booting, heading, flowering and maturity.

Second, the fertilizer demand characteristics of winter wheat in different growth stages

As we said before, wheat has seven growth periods, which can be roughly divided into three stages according to nutritional characteristics:

Seedling stage (from emergence to jointing stage): The vegetative growth stage in this period is dominated by growth, tillering and root system, which requires a wide range of nutrients, not only nitrogen to promote tillering, but also sufficient phosphorus and potassium nutrients. The main purpose is to promote tillering and increase the number of ears. Jointing and heading stage: After jointing, the growth of wheat mainly changes from vegetative growth to reproductive growth. At this time, water and fertilizer management should not only promote fertility, but also prevent excessive growth. Therefore, at this time, phosphorus and potassium fertilizer are mainly used. Heading to maturity: at this time, nutrient supply is mainly to increase the number of grains per panicle and wheat grain weight. Third, the demand for nitrogen, phosphorus and potassium in the whole growth period of wheat.

Winter wheat has a long growth period and needs a lot of nutrients, so the principle of fertilization for winter wheat is not only to meet the nutrient demand in its growth stage, but also to control the amount of fertilization in time.

For example, when changing from vegetative growth to reproductive growth, regulation is the key at this time. It is necessary to control the amount of nitrogen fertilizer and increase the amount of phosphorus and potassium fertilizer. Phosphorus and potassium fertilizer have become the essential elements of winter wheat. Too much nitrogen fertilizer has a negative impact on yield.

During the growth of winter wheat, more than 90% of the main elements constituting its dry matter are carbon, hydrogen and oxygen. These nutrients are natural, mainly from carbon dioxide in the air and moisture in the soil. In addition, there are about 5% elements, such as nitrogen, phosphorus and potassium, and a small amount of medium and trace elements. These different nutrients need soil supply.

If the nutrients in the soil are insufficient, fertilization is needed. According to the experimental results, about 2. 1 ~ 3 ㎏ nitrogen is absorbed for every 100㎏ wheat grain produced. Phosphorus 1~ 1.5 kg; Potassium 2.5~4㎏. Among them, the nutrition of nitrogen and phosphorus is mainly concentrated in grains; Potassium is mainly concentrated in stems and leaves. It can be seen from the above data that phosphorus and potassium nutrients account for a relatively large proportion in winter wheat's life, which is also the key to increasing the application amount of phosphorus and potassium fertilizers in the second growth period of wheat. These data also provide a basis for fertilization of winter wheat.

The above are the answers to the growth characteristics of winter wheat, the characteristics of fertilizer demand in each growth period and the demand for nitrogen, phosphorus and potassium. If you have any questions about wheat planting, you can leave a message in the comment area and we will discuss the topic of winter wheat planting together.