When will the wheat return to green water?

Wheat is generally in late March in spring, when the daily average temperature is more than 3 ℃, according to soil moisture and wheat growth, watering is generally appropriate to irrigate small water, not flooding during this period, but for weak wheat, it can be properly irrigated back to green water, and 15-20 jin of urea and 10-15 jin of potassium sulfate or potassium chloride per mu can be applied to promote the tillering of early spring wheat. So as to improve the quality and yield of wheat.

1. Time for wheat to return to green water

1. Generally, in late March of spring, when the daily average temperature is more than 3 ℃, it is more appropriate to pour green water on winter wheat. As the temperature begins to warm up, winter wheat vernalization will soon enter the green stage. Temperature is the main reason that affects winter wheat turning green. In winter, it is beneficial to water conservation, heat preservation and fertilizer preservation, which can better prevent freezing and protect seedlings, control up and down, make the wheat rhizome firm and seedlings grow strong.

2. Returning green water should follow the principle of scientific, reasonable and appropriate amount. If fertilizing water too early, it will lead to too many tillers of wheat in spring, resulting in a large population, resulting in a waste of nutrients and laying hidden dangers for wheat lodging and plant diseases and insect pests in the later stage.

2. the methods and matters needing attention of watering wheat back to green water.

1. Return to green water according to soil moisture.

The main results are as follows: (1) generally, the wheat fields where there is no winter irrigation, poor cultivated land quality and serious soil moisture loss before winter, as well as wheat fields with poor ontogeny, small population and serious drought, all need to be irrigated back to green water in time, and the time for pouring back green water is generally suitable when the average daily temperature is more than 3 ℃.

(2) generally, as long as the soil moisture in the wheat field is good, it is necessary to delay or not to irrigate the green water, and the turning green water can be postponed to the stage of getting up or jointing, while for the wheat fields with small population, poor growth, prosperous growth before winter and weak growth in spring, 20 jin of urea per mu can be applied together with watering, and when the soil moisture in the wheat field is more suitable after watering, it is necessary to hoe and preserve soil moisture in time.

2. Strictly control the amount of water poured back to green.

Due to the large temperature difference between day and night in early spring, coupled with frequent alternation of cold and warm air currents, it is generally appropriate to irrigate small water and avoid flooding, so as to avoid freezing damage to wheat caused by too low air temperature and ground temperature in the cold climate.

3. Pour back the green water according to the seedling condition.

The main results are as follows: (1) in the wheat field sown in the suitable time before winter, there will be less tillers of wheat due to the lack of soil fertility. Generally, if the total number of stems per mu is about 500000 before winter, it can be properly irrigated back to green water. 15-20 jin of urea and 10-15 jin of potassium sulfate or potassium chloride are applied per mu to promote the tillering of wheat in early spring.

(2) late sowing wheat and strong seedlings with a total stem number of 70-900000, as well as more than 900000 strong seedlings, which have sufficient fertilizer and water but do not return to green water, during which ploughing can be carried out to loosen the soil, preserve soil moisture and increase temperature, and it is appropriate to press the tillers in spring to a lower limit. Wheat fields that flourish before winter consume more fertilizer and water due to large growth, but do not carry out winter irrigation, resulting in poor soil moisture in the field, and it is easy to cause dead seedlings when they encounter cold spring in early spring. It also needs to be poured back to green water in time.