As the panic is approaching, as the temperature rises and the climate becomes warmer, Dendrobium can recover from normal or near dormancy. Since the severe cold from late January to early February 2016 has a certain impact on the safe wintering of the Dendrobium candidum in this county, the owners of the cultivation should combine their own reality to grasp the early spring management and lay the foundation for high quality and high yield.
First, do a good job in the cultivation of the cultivation bed
1. Combine harvesting stems, stem stems, weak stems, and dense stems in order to promote sprout growth.
2. Add matrix: For the bed with too few matrix, complete the supplement before and after the sprout growth to facilitate the growth of the new root.
Second, adjust the moisture
Delaying the water transfer in early spring will affect the time when new shoots (shoots) occur. If the matrix is ​​too dry, the water transfer should be carried out in different stages, ie, spray pre-wet and then spray; if the ground is to be transplanted, the matrix should be drained and permeate through a small amount to adjust the matrix water content to avoid excessive water spray. In the adjustment of moisture, but also to do a good job of ventilation, avoid tight shed.
Third, rational fertilization
1. Appropriate spraying of foliar fertilizer: For the wintertime, the plants with small plants and yellowish leaves of D. candidum can be sprayed with water-soluble fertilizers containing amino acids, such as Guoguang Shimei, Jinbiao, Green 668, etc. When spraying, pay attention to the concentration and weather changes; for the normal safe wintering of stems and leaves, after the matrix is ​​adjusted well, you can use high-nitrogen compound fertilizer or potassium dihydrogen phosphate plus urea or full nutrition foliar fertilizer, pay attention to concentration Do not be too high, should be 0.05-0.1%, usually spray 7-10 days once to promote the growth of new shoots.
2, supplement long-acting organic fertilizer: For the lack of fertility of the matrix should be applied in the right amount of fermented sheep manure, rapeseed cake and other organic fertilizers, can also be combined with supplementary matrix at the same time.
Fourth, do a good job of snails, dragonflies prevention and control work
Snails and clams are very fond of fresh leaves and young leaves of Dendrobium candidum, which cause some losses every year. Prevention and control work must be done firstly: First, granules such as worms must be applied on the surface of the cultivated bed and the columns of the bed frame; secondly, they should be removed. Weeds in planting areas, clear debris from surface plants, stones and other debris, reduce the hidden land of snails and degrade the places where snails inhabit. Third, use poisonous baits to trap and kill, use snails (polyacetaldehyde) and chopped bean cake or corn flour. The poisonous bait with 2.5% active ingredient was applied to the cultivation frame in the evening; the fourth was the application of tea dry powder or 500-1000 times the tea extract leachate. (The tea dried cake was crushed, wrapped in double gauze, and pressed Add dry water and 1:4 ratio to warm water, soak it for half an hour, and knead to obtain tea withered juice. For tree planting of Dendrobium candidum, a lap of non-woven fabric is tied around the base of the tree and granules of polyacetaldehyde (meta, meda, etc.) are applied to prevent the snails from damaging the tree.
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