Pouring good wheat fields with poor water quality before winter, especially wheat fields with incomplete rotation and repression, and wheat fields on sandy land, have winter frozen seedlings. In the case of poor sensation, severe cold injury can also be formed. Timely and appropriate watering of pre-winter water can effectively break the rubbish, solid soil, and enhance the contact degree between the root system and the soil, and it can play both drought-resistance and cold-resistance, reduce the impact of drought and freezing damage, and ensure the safe winter wheat. Pre-winter water can also promote the growth and development of the secondary roots of wheat, and increase the tillage percentage of tillers.
To prevent seedlings from prospering during this year's wheat seeding period, sufficient rainwater and generally good sensation were observed. The entire wheat field showed Miao Qi and Miao Zhuang, and the early sown plots were prosperous. As the saying goes: Wheat is not prosperous. Rolling, stepping on people, rolling, etc. can be used to suppress the Wangchang block and suppress its growth rate. At the same time, it can increase the amount of heat exchange in the soil, increase the temperature of the ground, and prevent the prolonged growth of wheat before winter leading to premature and rapid soil nutrient consumption and cold damage.
Beware of frost damage in winter wheat winter freeze injury is generally caused by a sudden strong cooling. At this time, because of the small seedling age, wheat did not accumulate a large amount of soluble solids, and was still young and weak seedlings that were in a period of vigorous growth. It had not undergone cold-resistant exercise and had poor anti-freezing ability. In particular, the low fertility of soil, poor quality of soil preparation, and lack of soil in the wheat fields can easily cause freezing damage in early winter in the event of a sudden and severe cooling of the weather. In winter, the type of wheat that suffers from freezing injury is weak seedlings and Wangmiao seedlings. Strong seedlings generally do not cause freezing damage, causing the tip to be frozen at most, and have little effect on the growth and yield of wheat. Effectively prevent frost damage In addition to repression of the Wangchang block, universal watering of wintering water, but also in the cold before the advent of smoke protection, to drive out the cold wave. The fuel formulation is 45% bitumen, 48% sawdust, 32% ammonium nitrate, and 5% diesel. After crushing and mixing, the mixture is sealed with kraft paper. Inside the fuse, a small hole is poked around. Uniform ignition, ensuring the quality of the smoke screen and receiving good results.
It is strictly forbidden for the animals to bleed before they are frozen and it is very easy to pull the roots out or pull them out halfway, causing dead seedlings or aggravating winter freezing damage. At the same time, wheat is still growing slowly, eating wheat leaves, reducing the leaf area, weakening the photosynthesis, and can also cause mechanical damage or physiological drought. After freezing, it will reduce the coverage, lose protection, reduce the temperature, increase the temperature difference, and easily freeze to death. In addition to the wounds caused by young wheat seedlings after indigo, the diseases are easily invaded and the diseases are aggravated. After partially or completely eating the wheat leaves, the heavy ones were frozen to death. Even if the light did not freeze to death, they returned to the winter and only had to rely on the tillering festival to survive the winter. The remaining storage nutrients were re-grown and the seedlings were very weak, and the spikelets were small and mature late.
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