Improve the quality of wheat growth and grasp the timing of winter irrigation
In order to improve the quality of wheat, it is very important to carry out timely winter irrigation of wheat after the winter. It not only can relieve drought, coordinate the water vapor in the soil, reduce the temperature difference between day and night, and increase the absorption capacity of wheat roots, but also helps to prevent seedlings and promote freezing. Winter strong seedlings. So, how to seize the opportunity to conduct timely winter irrigation of wheat? Remind peasant friends to do concrete work in the following three areas: First, look at the temperature. Generally, it is better to use the winter irrigation at night and the average daily temperature of 3 °C to 4 °C for winter irrigation. If the average temperature drops to 0 °C when the winter irrigation, the soil temperature will be lower, the water is not easy to infiltrate, the surface of the water stagnant ice, so that the seedlings suffocate, affecting normal growth. The second is to look at the public opinion. In general, the water content in 0-20 cm soil layers of different soils is used as the scale, and its calculation formula is as follows: Soil moisture content = (sample wet soil weight-sample wet soil dry weight) Sample wet soil dry weight 100%. When sand moisture content is lower than 13% to 15%, loam is lower than 16% to 17%, and clay is lower than 19% to 20%, winter irrigation can be performed. The third is to look at the situation. Generally, seedlings and normal growing wheat seedlings are the main objects of winter irrigation. For excessively prosperous wheat seedlings, winter irrigation may be postponed or not, so as to control the growth and reduce the freezing injury. China Agricultural Network Editor