When is the sweet potato harvest time?

Sweet potato ripens in August ~ 165438+ 10. However, due to the different planting time in different regions, there will be some differences in harvesting time. The best harvesting time for planting in May is late September or early October of 10, and for planting in June, it should be around late October of 10.

It should also be determined according to climatic conditions, safe storage time and the arrangement of the next crop. The ground temperature is about 65438 08℃, and the weight of sweet potato does not increase much; When the local temperature is about 65438 05℃, the sweet potato stops expanding; When the ground temperature is lower than 9℃ for a long time, cold damage will occur.

Therefore, when the local temperature is 18℃, the sweet potato should be harvested and planed before first frost. Dry spring sweet potato before cold dew or leave stubble to plant winter wheat; Summer sowing sweet potato is harvested and planted before the first frost; The stored and edible sweet potatoes are harvested after harvest, but they must be harvested before first frost.

Extended data:

Growth habit

Sweet potato likes temperature, is afraid of cold, and is not cold-resistant. The suitable growth temperature is 22-30℃, and the growth will stop when it is lower than 65438 05℃. Different growth stages have different requirements on temperature, and the temperature in bud stage should be 18-22℃. Too high or too low temperature will affect the germination rate.

The seedling temperature should be 22-25℃, the stem and leaf temperature should be 22-30℃, and the stem and leaf temperature should not be lower than 16℃, otherwise it will hinder its growth or even stop its growth; If it is lower than 8℃, it will cause plants to wither and die of frost.

The temperature of root tuber stage should be 22-25℃. Appropriate temperature can promote the growth of plants in each growth period and ensure the rapid number and expansion of roots.