Cold damage to wheat
When the length of wheat spikelets is about 2 cm, the differentiation process enters the stamen and stamen differentiation stage, which means that it has entered a period sensitive to environmental conditions. At present, it is the meiosis and pollen formation period of pollen mother cells of some varieties. When there is a cool weather, young ears will be damaged, and “light stalk†and “bare tip†will be formed, resulting in a decrease in the number of grains per ear. Reduce production.
High temperature damage to wheat
The temperature is too high, making the stem cells grow too fast during the jointing, resulting in the first two sections too long, thin wall, the plant lodging resistance decreased, increased the risk of lodging in the late wheat. At the same time, the differentiation of the panicles is accelerated and the end of the panicles is accelerated. It is easy to reduce the number of spikelets and reduce the possibility of large ear formation. At high temperatures, wheat grows rapidly. At this time, the cell fluid concentration decreases and the plant's ability to resist coldness declines. When encountering significant cooling or the arrival of “cold springâ€, the damage caused by low temperature on plants, young ears, etc., occurs.
Responses
To prevent abnormal temperature during the jointing stage of wheat, there are not many tricks. The most effective way is to water the plant and keep the field from being too dry.
Because, when the water or the humidity in the field is large, the moisture can stabilize the temperature rise and cool down too much. Wheat grown in a relatively humid environment, whether it is overwintering cold resistance or resistance to "cold spring" performance, is higher than wheat in dry soil.
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