Causes and solutions of rotten seeds and dead seedlings of the latest Chinese yam

In the process of yam planting, the phenomenon of yam rotten seedlings often occurs, which is due to insufficient experience of growers or irregular planting technology. When this situation occurs, the yield of yam will decrease year by year. So what is the reason for the rotten seeds of cabbage? Let's take a look at it together with Xiaobian.

1. Poor quality of seed blocks

The quality of Chinese yam seed block is the key to the quality and yield of Chinese yam seedlings. It is easy to cause slow emergence, weak seedlings and dead seedlings when using injured or undried seed blocks as seeds. The rate of rotten seed and dead seedling is more than 50% when fresh wound is used for sowing, so direct sowing of yam seeds with wound or not fully dried is an important reason for rotten seed and dead seedling of yam.

Solution: Determine the number of seeds reserved according to the planting area of yam. When harvesting seeds, leave as few wounds as possible. Before planting, dip the wounds in lime powder or carbendazim powder and fully dry them. Keep them properly to prevent freezing damage. Sunning seeds can not only accelerate wound healing, but also prevent bacteria from invading, promote seed block activities, and make adventitious buds germinate and grow healthy buds.

2. Low temperature and high humidity

More rainfall, higher soil humidity, low temperature and lack of light for a long time are the important reasons for the rotten seeds and dead seedlings of yam. In addition, the lower the temperature and the greater the rainfall, the more serious the rotten seeds and dead seedlings of yam.

Solution: When there is no continuous rainy weather 7-10 days before yam sowing, this is the best sowing time for yam, and at the same time, it is necessary to furrow and ridge 10 days before sowing, which can improve the ground temperature and reduce the cause of rotten seedlings.

3. Sowing too deep

In the investigation, it was found that about 65% of the fields with rotten seeds and dead seedlings were buried too deep, which indicated that under the bad climate of heavy rain, high humidity and low temperature, too deep sowing was also one of the reasons for large area rotten seeds and dead seedlings.

Solution: proven by practice. The suitable sowing depth of yam is 8-10 cm. If the sowing depth is too shallow, it is not conducive to germination when it is sown in dry weather and soil moisture; but if the sowing depth is too deep, it is easy to rot and die when it is in low temperature or continuous rainy weather.

4. Variety differences

Different varieties of Chinese yam have different degrees of rotten seed and dead seedlings. Among the main cultivated varieties, vegetable yam rotten seed and dead seedlings are obviously heavier than rice yam. Therefore, when selecting varieties for cultivation, we must select varieties that are not easy to rot seed and die seedlings according to local conditions.

The above is an introduction to the causes and solutions of yam rotten seedlings. I hope it can help you. If you want to know more about it, please pay attention to us.