Yam is the root or stem, what is the root of Yam?

Orchid autumn maintenance should pay attention to windproof, autumn typhoon, need to move into the room in time. In terms of light, the early autumn sunshine is relatively strong, so it is necessary to give orchids appropriate shade. But also timely prevention and control of pests and diseases, autumn is generally a season of high incidence of pests and diseases, to regularly spray insecticides and fungicides to plants. In terms of watering, because autumn is dry, plants will dry faster, and need to replenish water in time. In addition, it can also be properly fertilized, mainly phosphorus and potassium fertilizer.

1. is it a root or a stem

Yam is an underground stem.It is the stem and root of the transition, generally from the main stem of the apex of the expansion of the formation of its bud point is not much, only in the root neck there is one, there are many adventitious roots on the surface, and some of the lower part of the main root.Because the tubers have buds on them, they can be used for cutting cultivation, so that new plants can grow.

2. Sample of root

Yam has roots at the lower end, which usually grow horizontally and radially. When it grows to 20 cm, it can extend to the lower soil, and can grow to 60-80 cm deep at most.In addition to the main root, there are many adventitious roots on the surface of its tuber, which can also absorb water and nutrients and play a key role in the growth of the plant.

3. Morphological characteristics

1. Rhizome: The tuber of yam is long cylindrical, usually growing vertically, up to 1 meter in length.If it is cut off, the section is white.Its above-ground stem is purplish red and has no hair on the surface.

Chinese yam

2. Leaves: The leaves of yam are simple, the lower part is mostly alternate, the upper part is opposite, occasionally there will be three-leaf whorl.Seedling leaves are broadly ovate or oval, and vary greatly during growth, usually triangular to broadly ovate, and some are hastate shaped.The leaves are 3-9 cm long and 2-7 cm wide, with a pointed tip and generally 3-lobed.

3. Flowers and fruits: Its flowers are divided into male flowers and female flowers, male inflorescences are 2-8 cm long, relatively erect, usually 2-8 inserted between leaf axils, sometimes arranged into a cone, bracts and petals have purple-brown spots, female inflorescences are generally only 1-3.Its fruit is a capsule, usually oblate, with white powder on the surface and seeds inside.