In the middle growth stage, sweet potatoes often encounter hot and rainy weather. If sweet potato grows in waterlogged land with high respiratory intensity and poor ventilation, when the soil moisture reaches more than 80% of the field capacity, it is not good for the expansion of sweet potato.

The key of sweet potato waterlogging prevention lies in drainage waterlogging prevention. Before the arrival of the flood season, the drainage ditch must be dug in advance to prevent the rainy season from being flooded. In case of waterlogging, it is necessary to do a good job of drainage in time, strengthen the management of water and fertilizer in the field, actively prevent and control pests and diseases and reduce losses.