Propagation technique of Dendrobium candidum

Dendrobium candidum, also known as black section grass, Yunnan iron bark, etc., is a perennial epiphytic herb of Orchidaceae, distributed in Anhui, Zhejiang, Fujian and other places in China. Its stem is used as medicine and belongs to yin-tonifying medicine. Propagation methods mainly include ramet propagation, bud propagation and cutting propagation. Let's take a look at the propagation technology of Dendrobium candidum.

Ramet propagation

Select the densely growing plant of Dendrobium candidum, take it out of the basin after flowering, remove the old plant and cut it from the base of the tufted stem, cut the root system as little as possible, cover and cut only the very shaped parts connected with each other, and the root is opened by hand. You don't have to cut with a knife. Take the main plant as a group, and then further cut off the old root. Put the new bud near the center of the basin, fill it with a new matrix and compact it to form a new plant.

Budding propagation

Plants that have been potted for more than 3 years or some of the stems of Dendrobium can be cut and propagated when there are small plants at the top or base of the stem. Select the small plants with 3 leaves, 2 roots and 4 cm root length, cut them from the mother plant, treat the wound with plant ash or 70% mancozeb, and plant the seedlings in the pot. Wang Yi should plant them shallowly, and after 2 years of cultivation, they can generally bloom into commercial flowers.

Cuttage propagation

The cuttage propagation of Dendrobium candidum can be carried out together with changing pots after flowering and ramet, selecting unflowered and fuller whole sowing strips, cutting the technical strips into several segments, each section with 2-3 nodes, and applying plant ash or 70% mancozeb to treat the wound. Insert the stem into a mixture of moss and peat, half exposed and placed in a semi-overcast and damp place. Do not need watering 1 week after insertion, and then often spray moisturizing, appropriate shade. After 1-2 months, new buds appeared in the nodes, and 2-3 small roots grew under the new buds to form new plants. Put the new plant into the pot together with the old stem, it can blossom in 2-3 years, and the best cutting time is from April to August.

Tissue rapid propagation

The tissue culture seedlings of Dendrobium should be refined for 14 days before cultivation. The specific measure is to move the tissue culture seedlings to the seedling refining room so that they can gradually adapt to the natural environment in the open and changing environment, and can be planted in bottles when the leaves of the tissue culture seedlings are dark green. Open the bottle cap before coming out of the bottle and let the bottle seedlings be placed in the outdoor air for 2-3 days to adapt to the natural temperature and humidity. Then wash the seedlings, gently take out the seedlings with culture medium and wash them in the basin. The contaminated seedlings and bare-root seedlings or few-root seedlings should be placed separately. Tissue culture seedlings are first washed with tap water, mainly to wash off Agar to avoid Agar mildew causing rotting roots, and then rinse with clean water. When washing seedlings, it is best to grade them synchronously according to their size, advantages and disadvantages, so as to cultivate, manage, improve the survival rate of tissue culture seedlings and make them grow neatly.