Cultivation methods of Dendrobium

Potted dendrobium need peat moss, fern roots, bark pieces and charcoal and other light, good drainage, breathable matrix. At the same time, the bottom of the basin is covered with tiles or broken bricks to facilitate the development of roots. The cultivation site must have sufficient light, which is more beneficial to the growth and flowering of Dendrobium. Spring, summer growth period, should be fully watered, so that false corm growth accelerated. After September, gradually reduce watering, so that false bulbs gradually mature, can promote flowering.

Fertilization is applied once every ten days in the growth period, reduced in autumn, and completely stopped in the mature period of pseudocorms and dormancy period in winter. Dendrobium cultivated for more than 2~3 years, crowded plants, full pots of roots, potted materials have rotted, should be replaced in time. Both evergreen and deciduous Dendrobium are potted after flowering. When changing pots, the roots should be less damaged, otherwise the leaves will yellow and fall off at low temperature.

propagation method

Commonly used ramets, cuttings and tissue culture propagation.

① Plant division propagation

Spring combined with pot change. The mother plant with dense growth will be taken out from the pot, the roots and leaves will be less damaged, the orchid seedlings will be gently separated, and 3~4 plants will be planted in 15 cm pots, which is conducive to molding and flowering.

② Cutting propagation

The pseudobulbs which have not blossomed but grown well are selected, cut off from the rhizosphere, cut into segments every 2~3 nodes, directly inserted into peat moss or wrapped with water moss at the base of cuttings, kept moist, and rooted 30~40 days after insertion at room temperature of 18~22℃. The root length is 3~5 cm.

③ Tissue culture propagation

The differentiation rate of shoot tips and leaf tips can reach 1:10 on MS medium supplemented with 2,4-D 0.15 ~0.5 mg/L and 6-benzylaminoadenine 0.5 mg/L. The differentiated buds are transferred to contain activity

Charcoal. MS medium containing coconut milk (supplemented with 0.1 mg/L 2,4-D and 0.1 mg/L 6-benzylaminoadenine respectively) can grow normally and form rootless seedlings. When seedlings are transferred to MS medium containing 0.2~ 0.4 mg/L indolebutyric acid, roots can be induced and complete plantlets with roots, stems and leaves can be formed.

pest control

Often black spot disease, virus disease harm, available 10% antibacterial agent 401 acetic acid solution 1000 times liquid spray. Insect pests have scale insect harm, with 40% omethoate EC 2000 times spray kill.

Control methods:

1. Clean orchids: A few diseased leaves appearing in orchids should be cut off, and fallen leaves collected during winter onset should be burned.

Second, greenhouse environment management: the temperature in the greenhouse is often as high as 40 ° C in summer high temperature period, ventilation and cooling should be adopted to avoid poor growth of orchid plants, water supply in winter low temperature period should be sunny and sunny at noon, and some plastic sheets should be opened to increase ventilation to reduce indoor relative humidity.