When is the sweet potato harvested with good quality? How to store it without decay?

The harvest time of sweet potato is closely related to its yield and safe storage. Sweet potato and ginger are asexual vegetative bodies and have no obvious maturity characteristics. As long as the climatic conditions are suitable, it will continue to grow, so harvesting too early will definitely lead to low yield. But the harvest is too late. I'm afraid it will freeze and I can't store it.

First, the ground temperature of the first frost solar terms is low, and the sweet potato will be harvested.

Sweet potato will stop swelling at the ground temperature of 15℃, and the stems and leaves will naturally wither below 10℃. If the temperature is lower than 9℃ for more than 10 days, potato chips may suffer from cold injury and will produce physiological rot.

For example, here in Anqiu, Shandong Province, after sowing wheat, it is generally decided whether to harvest sweet potatoes according to the weather. Generally speaking, harvesting begins around the first frost, that is, at the beginning of 10, and is completed before the end of110.

The temperature drops before and after the first frost, and frost will appear at any time. Generally speaking, the dried sweet potatoes are harvested first, then the seed potatoes are harvested, and finally the stored fresh potatoes are harvested. Sweet potato varieties that are not tolerant to freezing are harvested first, and those that are tolerant to freezing are harvested later.

Second, the storage of sweet potatoes.

Sweet potato has a lot of water, thin skin and tender flesh, and it is easy to be bruised. Such sweet potatoes are easy to rot during storage, and it is necessary to create suitable conditions to store them well.

Sweet potato has a long history of cultivation in China, and everyone has created a suitable storage method according to local conditions.

Like Anqiu, Shandong, we mainly use:

1, big house foot

This should be familiar to everyone. In a large group, almost every village has a large cellar for storing seed potatoes, fresh potatoes and so on. Later, fewer sweet potatoes were planted and some big houses were destroyed.

2, hair hanging in the cellar

This is an improved version of the cellar of the big house. Hanging with bricks, stones, etc. Cultivate thick soil at the top and around and store sweet potatoes in it. This structure is strong and durable. Now there are fewer varieties of sweet potatoes, some are destroyed, and some are changed into places for storing apples and ginger.

3. Sweet potato pit

It is to dig a deep well where the soil is hard and the groundwater level is deep, and store sweet potatoes inside. This storage method is basically opened by many people, such as storing a fresh potato. Later, it was changed into a cellar for storing ginger.

4, shed cellar

This is relatively simple. Dig a square pit, put a wooden stick on it, then spread the crop straw, cultivate the soil and put the potatoes in. The hole should be blocked to prevent cold air from invading the frozen sweet potato.

5. Constant temperature storage

Now the storage facilities are more and more advanced and perfect, and having a professional constant temperature warehouse can greatly extend the storage time of sweet potatoes.

Then cut dry and store. Since the quantity is small now, I will put a paper box in the house to ensure that it is not cold or hot.

Three, sweet potato storage management points

The temperature of sweet potato is high when it first enters the cellar, so all vents must be opened to cool down and closed at 13℃.

Sweet potato is prone to freezing injury at low temperature in winter, and the cellar temperature should be kept at 12? 14℃, pay attention to cover the grass and close the vent.

Years later, with the increase of temperature, if the temperature in the cellar is higher than 15℃, it should be ventilated to cool down, but it should be kept warm to prevent cold current.

In a word, sweet potato is a kind of food with high nutritional value, and it has the advantages of low consumption of chemical fertilizers and pesticides, high and stable yield and low investment. With the continuous improvement of people's living standards, eating habits are also changing, and the economic benefits of planting sweet potatoes will be better and better.