Why wheat has ears and no grains

Wheat is a very important food crop in China, and wheat is the main staple food in many parts of our country. Therefore, there are still a lot of people growing wheat now. When we plant wheat, many people will find that wheat often has spikes and no grains, which seriously affects the yield of wheat. So what is the reason why wheat has spikes and no grains? Today, the editor will give you a brief introduction. Let's take a look at it.

1. Freezing injury at booting stage

After the jointing stage, the cold resistance of wheat will gradually decline. Generally speaking, about 5 days after jointing, freezing damage will occur at minus 2 degrees, and with the passage of time, the ability to resist cold will continue to weaken. And in the spring from March to April, it is easy to appear the cold phenomenon in late spring, so it is very easy to cause freezing damage to the seedlings that have already jointed. If the young spike of wheat is damaged by freezing, it will affect heading, and some of them will lose their appearance or even fail to heading after heading. And some spike grains are not mature, resulting in seedless phenomenon, but generally only on a single stem.

2. Climate discomfort during flowering.

When wheat plants form grains, it is usually 10 days after flowering and fertilization. At this time, the size and number of wheat ears are generally determined before heading. On the other hand, the grain number and grain weight of wheat ear will be directly affected by environmental conditions. Wheat in flowering and pollination, the temperature should be maintained at about 20 degrees, if the continuous rain, the temperature below 10 degrees, it will delay the flowering of wheat. As a result, there are shrunken grains and diseases, and if the temperature is higher than 35 degrees and the soil is dry, it will reduce the seed setting rate of wheat. And if it rains continuously, the wheat pollen grains will absorb water and swell, and the pollen can not be fertilized and aborted, resulting in the phenomenon of spikes and no grains.

3. Human reasons

The fact that wheat has ears and no grains is mostly caused by man-made reasons. Many farmers are used to spraying at noon when the wheat is in full bloom, resulting in no seeds in all the sprayed plants. Or it is caused by excessive spraying, when the medicine is used in the flowering stage of wheat, if the drug is not used strictly according to the dosage, the concentration of the liquid is too high, resulting in excessive local use of medicine, damage to wheat pollen, and pollen abortion, resulting in seedless phenomenon. Therefore, we must pay attention to the management work, control the amount and time of drug use, and avoid human factors causing wheat to have spikes and no grains.

4. Improper use of herbicides

Improper use of herbicides is also one of the main reasons why wheat has spikes and no grains. When using herbicides in wheat fields, they should be used before jointing, otherwise wheat is prone to drug damage. For example, in the use of dimethyl tetrachloride and other herbicides, if the use is too late, then the wheat ear is prone to abnormal phenomenon, serious can not heading. If any other herbicide is used too late, especially if it is used in the male and female differentiation of young spikes of wheat. It will affect the development of florets and hinder the differentiation of male pistils in wheat, thus affecting the phenomenon of spikes and grains, resulting in a serious reduction in wheat yield.

The above is a brief introduction to the reason why wheat has spikes and no grains. That's all for today's introduction. This article is for reference only. I hope it can help you all.