Yield: under conventional planting conditions, Cangzhu's mu yield is about 1200-1500kg (fresh), and after being made into dry products, it is about 340-420kg, and the specific yield is related to planting techniques. Harvesting time: seed sowing, usually 3-4 years after sowing to harvest the rhizome; rhizome propagation, usually 2-3 years after sowing to harvest (after the fall to the next spring before the emergence of seedlings to dig).

I. Cangzhu mu yield

1, yield

Conventional planting conditions, an acre of Cangzhu can produce 1200-1500kg of fresh Cangzhu, made of dried products, about 340-420kg or so, the specific yield depends on planting management techniques, local water and fertilizer conditions and other factors.

2, harvest

(1) If the seeds are sown, generally 3-4 years after sowing the rhizome harvest. If it is rhizome reproduction, generally harvested 2-3 years after sowing.

(2) Cangzhu can be harvested in the spring and fall, with the best quality of Cangzhu dug after the fall to the next spring before the emergence of seedlings.

(3) Cangzhu after harvesting, remove the surface of the stem and leaves and soil, and then drying to about fifty percent dry, into the frame, part of the roots knocked off, this time the epidermis is black-brown; drying to six to seventy percent dry, and then knocked off all the old skin; drying to the whole dry, and then knocked off the epidermis is yellow-brown.

Second, Cangzhu management technology

1, land organization

(1) choose the soil is loose and fertile, drainage and irrigation performance is good humus soil or sandy loam for planting.

(2) Apply 2000kg of well-decomposed, high-quality farmyard fertilizer per mu.

(3) deep plowing and deep tilling of the land, and then leveled to make the border, border width 1m, height 25cm, length adjusted according to the land situation.

2, sowing

In mid-March to early April, each acre of land evenly sown 3-4kg of Cangzhu seeds, after sowing covered with a layer of 2-3cm thick soil.

3, management

(1) seedling period, timely weeding.

(2) At the beginning of May, apply 1000kg of clear manure water per mu. In June, when the growth period is in full swing, apply 1250kg of well-rotted human and animal manure or 5kg of ammonium sulphate per mu. Before the flowering in August, apply 1000-1500kg of well-rotted human and animal manure per mu, as well as the appropriate amount of grass ash.