Causes of species degradation of Chinese yam and its solutions

Chinese yam is rich in nutrition, and its planting range is more than that of worker bees. It is a crop with high economic value. Its price has been relatively stable in recent years, but in the process of planting, the resistance of Chinese yam is reduced, the stem is small and deformed, and the yield decreases greatly, which seriously reduces the commodity value. In fact, this is the species degradation of Chinese yam, what is the cause of the degradation of Chinese yam? How to prevent and cure it? Come and have a look with the editor.

1. Continuous cropping

Chinese yam has a great demand for soil nutrients, generally, it will absorb the soil nutrients clean after planting once, so it can not be planted continuously, and the land needs to rest and recuperate for several years before it can continue to grow. Continuous cropping not only causes lack of nutrients, but also accumulates more diseases and insect pests, which is easy to breed diseases and insect pests in the process of planting, especially nematodes, resulting in a serious decline in yield and quality.

Solution: it is necessary to adopt a reasonable way of rotation to avoid continuous cropping and put an end to the species degradation caused by continuous cropping. The seeds can be soaked with carbendazim for half an hour and placed in wet sand to play the role of disinfection and disease prevention. Once the diseased plants are found during the production period, the diseased plants will be pulled out in time, and the surrounding plants will be pulled out together, and then disinfect the disease points with lime.

2. Virus

Virus is one of the main causes of species degradation of Chinese yam, the virus will lurk in stems and plants, not only spread year after year, but also strengthen year by year, resulting in curling and wrinkling of plant leaves, reduction of green leaves, and abnormal conditions at a glance. Although the plant will not die, but the yield and quality decline is more serious.

Solution: to use virus-free stem and plant planting, also before planting to carry out strict disinfection of the seed block and plant around to kill the bacteria. It can be propagated with chemicals in the process of production, which can not only prevent the occurrence of diseases, but also maintain the superiority of improved varieties and prevent the degradation of species.

3. Variety variation

This situation is mostly caused by seed tuber. among the purchased seed potatoes, there are a large number of variant seed potatoes, which are mixed with improved varieties to breed, resulting in species degeneration. most of these situations are caused by the imperfect facilities of seed potato breeding base and the irregularity of simplifying breeding procedures.

Solution: if you want to avoid this situation, you should buy seed potato, purify and select seed potato, buy good seed potato that accords with your own cultivation, and put an end to the problem of seed degradation from the source. At the same time, the establishment of a sound breeding system of improved varieties of Chinese yam is the most effective measure to accelerate the promotion of improved varieties, maintain the character of the species and prevent the degradation of the species.

The above is the introduction of the causes and solutions of species degradation of Chinese yam. I hope it can help you. If you want to know more about it, please follow us.