Production of Dendrobium candidum seedlings
Collect wild Dendrobium candidum with healthy growth traits as provenance and carefully maintain it. Artificial pollination was carried out at the flowering stage of Dendrobium candidum to obtain authentic Dendrobium candidum fruit pods. After the seeds are ripe, they are sown to form a mother bottle of Dendrobium candidum. After transplanting, strengthening seedlings and rooting, a healthy and authentic mother bottle of Dendrobium candidum is obtained.
Environmental conditions of Dendrobium candidum
Dendrobium candidum has strict requirements on the environment, and choosing a suitable environment is half the success of cultivation. Dendrobium candidum should be planted in a humid and cool place at an altitude of 800~ 1600 meters. Optimum growth temperature 15~30, optimum growth period 16~2 1, nighttime temperature/kloc-0 ~13, temperature difference between day and night 10~ 15. The annual rainfall exceeds 1000 mm. Seedlings are easily frozen below 10, and Dendrobium candidum leaves at about 5. The relative humidity of Dendrobium candidum should be kept at about 80% to avoid dryness and water accumulation, especially when new buds begin to germinate and new roots form. Shade 70% in summer and autumn and 30~50% in winter. If the light is too strong, the stem will swell and turn yellow, the leaves will be yellow-green, and the growth will slow down or stop.
Conditions of Dendrobium candidum facilities
Dendrobium candidum has high environmental requirements and needs to be planted in a protected environment. Simple bamboo and wood frame greenhouses and steel frame greenhouses can be built, but the greenhouses must be well ventilated and equipped with internal and external sunshade nets. If the funds are sufficient, we can consider planting Dendrobium candidum in a steel greenhouse for a long time, which has a long service life and a lower repair rate. According to the cost, insulation and service life of plastic film, 12~ 15 line can be selected.
1. ground planting: the soil needed in the shed should be fully dried in the sun, and then treated with octane sulfonic acid to kill pests and eggs left in the soil. Build a seedbed with bricks or stones in the shed. Seedbed height 15-20cm, width 1- 1.5m, and length depends on the terrain. Pave a layer of 5- 10cm thick gravel and other materials with good water permeability, and finally pave a layer of about 10- 12cm thick. Fermented bark or sawdust, coconut shell, bagasse, decaying fallen leaves or moss are used as cultivation substrates, and 40-50 layers are left between seedbeds.
2. Seedbed planting: According to the financial situation, a bamboo or steel seedbed with a width of about 1.2 ~ 1.5m and a height of about 80cm can be built. There are 40~50 cm wide channels between seedbeds, which are used for daily cultivation and also for building steel movable seedbeds. The width and height of the seedbed are similar to those of the fixed seedbed, but only one channel is needed to improve the utilization rate in the shed. A layer of 10- 12 cm of fermented bark, broken wood, sawdust, coconut shell, bagasse, decaying fallen leaves or moss is laid on the bottom of the seedbed as the cultivation substrate.
Conclusion: Seedbed planting of Dendrobium candidum is recommended, because seedbed planting has better water permeability than ground planting, which is beneficial to root rot of Dendrobium candidum caused by unfavorable water accumulation in seedbed, reducing local pests such as snails, slugs and cutworms, and is beneficial to the healthy growth of Dendrobium candidum. If long-term culture is considered, the choice of medium is very important. Compared with moss, sucrose residue and rotten leaves, the accumulated fermented bark, broken wood and sawdust have better corrosion resistance and are always in a semi-rotten state, which is more suitable for the cultivation of Dendrobium candidum and is an ideal cultivation substrate.
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