Cold damage occurs mostly before and after sweet potato harvest and during winter storage. If the harvest is not timely or the day after the harvest, it will not enter the sputum. If the temperature is below ~2 °C, the cell gap will freeze, the tissue will be destroyed, and the rot will occur after the sputum.
The cold damage after entering the flooding occurred mostly in the middle of storage. At this time, the North China region was in a severe winter, and the temperature was often below 0 °C. If the heat preservation was not good, the temperature inside the crucible dropped below 9 °C, and the long time will affect the potato tubers. The life activities, and then the cold damage. After the sweet potato is frozen, the head and tail are rotted, the section lacks milk juice, the vascular bundle turns brown or black, and there is a hard heart after cooking, or some or most of the lumps have odor. Because sweet potato is frozen, its disease resistance is weak, and it is prone to rot.
1. Harvesting begins when the temperature is stable at 15 °C, and harvesting ends at not less than 10 °C. The North China region has the best harvest before the frost, and should be harvested on the same day.
2. In the middle of storage (about 20 to 30 days after the introduction of sputum to before and after the winter), the temperature should be maintained at 11 ° C ~ 13 ° C, the maximum does not exceed 16 ° C, if less than 10 ° C, there is the possibility of chilling. When the average temperature of the day drops below 0 °C, the cover should be thickened and the mouth should be sealed to facilitate heat preservation.
Total 1 | <First <Prev 1 Next> Last> |
share to:
Emergency Led Drivers,Emergency Battery Backup Led Driver,Led Emergency Backup Driver,Emergency Light Drivers
Foshan Nai An Lighting Electric Co.,ltd , https://www.emballast.com