Cold winter wheat late sowing can be antifreeze?

Recently, some online media reported that "this winter is cold, and wheat can be sowed 3 days later." I believe this is unscientific. Wheat is the best anti-frozen plant during proper planting, and both early planting and late planting have drawbacks.

What is the appropriate sowing date? “Appropriate” is based on the standard that wheat is formed before winter (5 to 7 leaves, 3 or more Oitas), and is derived from the effective accumulated temperature from the time of wheat sowing until overwintering. The effective accumulated temperature is roughly in the range of 450. ~600°C. That is to say, if the suitable sowing period for a variety cultivation instruction is on October 5-15, we will sow at this time, and the accumulative temperature that no longer grows before winter wheat should be at 450-600°C. 5 to 7 leaves and 3 or more large branches. At this time, the wheat spikes did not enter the dichotomous stage and there was no sign of elongation between the first basal nodes. However, the depth of the root system at this time had fallen below tens of centimeters below the soil and even reached 1 meter. This kind of wheat has accumulated much more nutrients and consumes less, which has laid a solid foundation for safe wintering. Such wheat seedlings are most resistant to freezing.

The cold injury of cold winter wheat will be heavier, which is beyond doubt. However, there are cold winters with extremely cold or extreme cold weather. Most of the frozen, frostblasted wheat is wheat that has not been sown in proper time. For example, wheat was already planted during the National Farmer's Day in south-central Henan in 2015. These "outrageous" sowings of wheat have experienced significant cooling and freezing, and even a large number of dead seedlings. Due to the early sowing, the winter will enter the two-legged or young panicle development stage of wheat spikelet differentiation, and there will be signs of elongation between the nodes. At this time, the cold resistance of the wheat seedlings is greatly reduced, even if it is not encountered. At low temperatures, cold damage can also occur.

On the contrary, if late sowing, wheat did not form strong seedlings before the winter, especially the wheat seedlings just before and after the three-leaf stage, it is the wheat seedlings "weaning period." Wheats in the "weaning period" have a weak ability to produce their own nutrients. The nutrients of the seeds have been used up. The roots are still under the lighter branches (the roots are slower when the temperature is lower), and the leaves are also thinner and smaller. The color is lighter... The wheat seedlings at this time are the most vulnerable, and they can't resist the adversities such as cold and drought. In addition, late sowing may also cause wheat to have small spikes and small grains, which pose a threat to yield. In areas or years with high incidence of head blight, late sowing will also cause the flowering period of wheat to shift backwards and increase the humidity between wheat fields during flowering and give wheat head blight. The occurrence of the occurrence of favorable conditions; Late broadcast late, the delay in the harvest of wheat, and may also encounter harvest rain.

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There`re not only the residues of digested food but also a lot of toxins, such as ammonia which may induce hepatic coma, hydrogen sulfide affecting the nervous system, methylindole leading to cancer, botulinum toxin, Tan toxic alkali, benzene, formic acid, butyric acid and so on. With the growing age, feces and toxins gradually accumulate in the body;

Been absorbed into the blood system by the intestinal mucosa, they will cause damage to the organs, meanwhile, lead to digestive system diseases and skin problems, even though make blood pressure problem, heart disease, Alzheimer`s and other symptoms worse. Impacted feces accumulate in the colon for a long time is an important inducement to the colorectal cancer.

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