Culture method of longifolia

Long-leaf orchid is an epiphytic plant of the genus Orchid, which is born in the forest or on trees or rocks on the edge of the forest. It is 1400-2800 meters above sea level. It is distributed in southwest Sichuan, northwest to southeast Yunnan and Xizang (Bomi, Chayu, Motuo) and other places. It has high horticultural cultivation value. Let's take a look at the breeding methods of long-leaf orchid.

Growth habits of long-leaf orchid

Long-leaf orchid like shade, avoid direct sunlight, like moisture, avoid drying, 15 ℃ to 30 ℃ is the most suitable for growth, 35 ℃ or more bad growth, the cold below 5 ℃ will affect its growth, at this time the orchid is often in a dormant state, such as the temperature is too high plus sun exposure, there will be leaf burns or scorched within one or two days, if the temperature is too low and did not transfer into the house in time, there will be frostbite. It is suitable to use sandy loam rich in humus, and its drainage performance must be good. Humus leaf soil or mountain soil with more humus, slightly acidic loose soil or iron-containing soil should be selected, and the pH value should be 5.5-6.5.

Propagation methods of long-leaf orchid

1. Ramet: it can be carried out in both spring and autumn, usually every three years. All plants with dense pseudocorms can be ramified, and at least 5 connected pseudocorms should be preserved in each clump. Irrigation should be reduced before splitting, so that the basin soil is better than. When putting on the basin after ramet, first cover the bottom hole of the basin with broken tiles, then cover with coarse stones, occupy the depth of the basin from 5 to 1, and then put coarse-grained soil and a small amount of fine soil, and then plant it with sandy loam rich in humus.

2. Sowing: it is best to sow the uncracked fruit, sterilize the surface with 75% alcohol, take out the seed, soak it with 10% sodium hypochlorite for 5 minutes, rinse it with sterile water for 3 times and sow it in a culture bottle containing the culture medium, then place it in a dark culture room at a temperature of about 25 ℃, germinate and then move to the light to form a protocorm, which takes half a year to one year from sowing to transplanting.

Culture method of long-leaf orchid

1. Potting: the potting time of Cymbidium is usually from March to April in spring or from October to November in autumn. Flowerpots with small mouth, deep pot, large bottom hole is better. The wild seedlings newly dug from the mountain should be planted in the tile basin (mud basin), so that the orchid mud is easy to dry and the ventilation is good. It is easy to root, and the purple sand basin or porcelain basin can not be replaced until 2 or 3 years later.

2. Planting: the planting method of long-leaf orchid is different from that of general flowers, especially for famous orchids, the roots must be washed when turning seeds and moving pots. Methods soak the root in clean water, wash it gently with an old toothbrush or brush, do not hurt the root too hard, cut off the residual leaves, yellow leaves, broken roots, black and rotten roots with scissors, and pay attention not to hurt the buds. Then put the treated plants in a cool and ventilated place to dry, wait for the roots to be white and show small wrinkles soft, and then implanted in the basin.

3. Watering: watering in the peak period of orchid growth, once there is a lack of water in summer, the orchid will grow poorly, and the orchid needs eight minutes dry and two minutes wet. Watering should be in line with the principle of "dry is poured, wet is stopped, and properly dry". The water must be thoroughly watered, not half of it. The watering times can depend on the plant material of the pot orchid.

4. Fertilization: farm manure is a good organic fertilizer, but it must be deposited and mature for more than one year before it can be applied. Can use this kind of fertilizer liquid to water 10: 20 times, apply to the edge of the basin as far as possible, do not touch the roots, do not touch the orchid leaves. When applying chemical fertilizer, we should pay attention to the balance of nitrogen, phosphorus and potassium, and strictly control the concentration. Leaf art seedlings should control the synthesis of chlorophyll and should not apply nitrogen fertilizer or fertilizer containing manganese and magnesium (such as calcium magnesium phosphate fertilizer, etc.).

5. Pruning: when the long-leaf orchid sprouts, the plant is pruned once, the overlong and dense branches and part of the old branches are cut off, and many new branches sprout at its nodes, making the plant shape fuller. As the growth of clover is fast, it should be shaped frequently in cultivation and the branches affecting plant shape should be cut off in time to keep beautiful.

Disease and insect control of long-leaf orchid

1. White silk disease: White silk disease mostly occurs in the mildew and rainy season. At the beginning of the disease, the leaf base is covered with white silk. Causing the rhizome to rot. The control method is to remove the bacteria-carrying basin soil and sprinkle it with pentachloronitrobenzene powder or lime. The radical cure method is to pay attention to ventilation and light transmission, and the basin soil is well drained. Seriously diseased plants will be burned.

2. Anthrax: the disease spot first extends from the leaf tip to the rhizome, first brown, and then gradually expands and increases, resulting in many dry black spots, which in serious cases lead to the death of the whole plant. In addition to actively improving the environmental conditions of Bodhisattva, during the onset period, 50% methyl topiramate wettable powder 800-1500 times can be sprayed once every 7-10 days, and then supplemented with 1% equivalent Bordeaux solution, once every semimonthly, 3 times continuously.

3. Scale insects: scale insects, commonly known as "blue lice", reproduce fastest in the case of high temperature and humidity and poor air flow, and can be sprayed with 1% omethoate or 1500 times 50% Mara sulfur during the incubation period. If the number of pots is small, it can also be brushed out manually.