When will the yam be harvested?

Generally, yam should be harvested when all stems and leaves wither in autumn, and the yield is low and the water content is easy to break if harvested prematurely. If you are not in a hurry to go public, you can stay in the ground for the winter, or you can postpone it until the middle and late March of the following year at the latest, and harvest it before germination.

Second, the cultivation of yam:

Dig out the roots in June 1 and June 10, select yam reed head with short neck, full bud head and no plant diseases and insect pests, fold it for 16 ~ 20 cm, sun it for 2 ~ 3 days, and dig a pit indoors or outdoors. The depth of the pit and the thickness of the cover should prevent the reed head from freezing. The temperature is about 5℃.

2. After thawing, apply sufficient base fertilizer, turn over 26-33cm, carefully turn over and level, and make a flat or high border with row spacing of 33-50cm, plant spacing 16-20cm and ditch depth 16cm, apply decomposed manure and cover soil, and slightly suppress it. Before emergence, use a rake to break the surface hardening, keep the edge moist, and emerge in about 15 ~ 20 days.

Extended data:

Yam has the following functions:

1. Traditional Chinese medicines for lowering blood pressure, such as Liuwei Dihuang Pill, Bawei Dihuang Pill and Guishao Dihuang Pill, are all famous prescriptions made of yam, which are used to treat not only kidney deficiency, but also hypertension, diabetes, asthma, neurasthenia and lumbago.

2. Anti-aging Modern science has proved that yam can significantly reduce the activity of enzymes that accelerate the aging of the body. Bawei Dihuang Pill containing yam is mainly used to treat postpartum sweating.

3. Anti-tumor effect Yam tuber is rich in polysaccharide, which can stimulate and regulate human immune system. Therefore, it is often used as a health care drug to enhance immunity. Dioscorea opposita polysaccharide can antagonize the cellular immune suppression caused by cyclophosphamide and restore some or all of the suppressed cellular immune functions to normal.

4. Allantoin contained in yam can be used to treat skin diseases, such as chapped hands and feet, ichthyosis and various keratotic skin diseases, because it has anesthetic and analgesic effects, and can promote epithelial growth, diminish inflammation and inhibit bacteria.

References:

Chinese yam) _ Baidu Encyclopedia