Prevention and control measures of premature senescence in rape

In the process of rape planting, the phenomenon of premature senescence sometimes occurs due to improper management. once the phenomenon of premature senescence occurs, it will have a great impact on the yield, so farmers attach great importance to it. So what are the symptoms of premature senility of rape? I don't know what to do Let's take a look at the detailed introduction.

1. Symptoms of premature senility

In the process of rape growth, if it shows abnormal purplish green, the new leaves are smaller, but very straight, and the mesophyll tissue becomes thinner, showing obvious hypoxia. The base of the stem is small and thin, the stem skin is wrinkled, showing bluish purple, its growth rate is obviously slower, mainly for the slow emergence of leaves. According to the measurement, when rape turns green, it takes only 8-10 days for a new leaf to grow, while it takes 15 days for a new leaf to take off, which not only slows down the growth of rape, but also affects its final yield.

2. Causes of premature senility

The reason for the premature senility of rape is that there is no supply of nutrition. Rape needs nitrogen plants. When the temperature rises in early spring, its growth rate will accelerate. If it does not have sufficient fertility to make it grow, it will appear premature senility due to lack of nutrition. In addition, excessive humidity in the field is also the cause of premature senility. In long-term wet fields, the root system of rape will blacken, root hair will fall off, water absorption and fertility absorption is weak, growth is hindered, and the aboveground part shrinks due to long-term lack of nutrition, resulting in premature senility.

3. prevention and control measures

In the process of rape planting, it is necessary to increase the supply of fertilizer, especially when the temperature rises in spring, when it grows fastest, which is related to the yield in the later stage. Generally, fertilization began in February, and nitrogen fertilizer was the main fertilizer in the early stage, with phosphorus and potassium fertilizer to promote the growth of rape. Of course, in addition to fertilization, the humidity in the field should also be properly controlled, pay attention to the number of watering and the amount of water, one watering should not be too much, so as to avoid stagnant water in the field. It should be drained in time after rain to avoid retting the roots, causing the roots to rot and die and lose their absorptive capacity.

The above is the introduction of rape premature senility prevention and control measures, hope to help you, want to know more related knowledge, please pay attention to us.