The harm of low temperature to wheat
When the length of the young wheat ears is about 2 cm, the differentiation process has entered the pistil and stamen differentiation period, that is, it has entered the sensitive period affected by environmental conditions. At present, it is the period of meiosis of pollen mother cells and pollen grain formation in young ears of some varieties. When the temperature drops, the young ears will be damaged, forming "bright stalks" and "bald tips", which will eventually lead to a decrease in the number of ears and grains. Reduce production.
The harm of high temperature to wheat
Too high temperature causes the cells between the stems to elong too quickly during the jointing period, which causes the first and second nodes to be too long and thin, which reduces the lodging resistance of the plant and increases the risk of lodging in the middle and late stages of wheat. At the same time, the spike differentiation speeds up, and the end will also speed up. It is easy to reduce the spikelet primordium and reduce the possibility of large spike formation. When the temperature is high, the wheat grows rapidly. At this time, the cell sap concentration decreases and the plant's cold resistance ability decreases. When there is a significant drop in temperature or the arrival of "falling spring cold", low temperature damages the plants, young ears, etc.
Responses
There are not too many tricks to prevent abnormal temperatures at the jointing stage of wheat. The most effective way is to water and prevent the fields from being too dry.
This is because when watering or field humidity is high, the moisture can calm the excessively high and excessive heating and cooling. The wheat grown in a relatively humid environment has higher winter resistance and "falling cold" performance than wheat in dry soil.
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