The medium for planting orchids is very acid-prone. How do you overcome it?
After planting orchids with aquatic plants, the plants become contaminated with acids that produce organic acids after a few days, and then the orchid roots are prone to blackheads (Fusarium infection).
The medium for planting orchids is boiled with water or sterilized by sterilization in a sterilization tank. Why can't the problem of orchid blackheads be completely overcome?
Some orchids boiled or high temperature sterilized aquatic plants and planted orchids. Although they can temporarily kill bacteria and eggs, they still cause acidity after planting and cause blackheads in orchid roots. This is because orchids are still produced after planting. Organic acid caused by bacterial contamination.
How can black orchids be reduced by planting orchids?
The phenomenon of blackheads produced in orchid roots is mainly caused by the contamination of medium plants with bacteria that produce organic acids, causing acidification of the medium and causing the proliferation of Fusarium (Fusarium grows best around ph4). Therefore, increasing the pH of the medium can reduce the incidence of Fusarium. infection.
How to reduce the effective reduction of blackheads?
Application of small molecules of water-soluble chitin and actinomycetes diluted with water 2000 times watering orchids, can effectively reduce the phenomenon of orchid blackheads. Water and grass and other media are diluted 1000 times with small molecules of water-soluble chitin and actinomycetes soaked for 1-5 minutes and can be planted after draining.
What is the small molecule water-soluble chitin? What are the benefits of orchids?
Chitin is very widely distributed in nature. For example, shells of crustaceans (shrimps, crabs, etc.), shells of insects (clams, butterflies), shells of molluscs (clams, oysters), and endoskeletons (squids) all contain chitin. After the calcium and protein are removed by acid-base treatment, chitin is obtained, and chitin is treated with high-temperature and high-alkali to give diethyl chitosan, chitin, chitosan. Collectively referred to as chitin.
The advantages of using chitin on orchids:
1, so that the media can be used as a continuation of chitin can be beneficial microorganisms in the medium: such as actinomycetes increased, so that harmful bacteria: fusarium and other reduced, and can eliminate root nodule nematode, reduce media continuous cropping obstacles.
2. Promote wound healing and development in the roots, increase root hair and increase nutrient absorption. Promote plant growth.
3. Induce the production of phytoalexins, increase crop resistance to diseases, and reduce the use of pesticides.
4, increase the calcium content of orchids, can increase the stiffness.
5, to increase the absorption of trace elements to increase the reducing sugar content of leaves, early harvest, improve quality, extend the preservation period.
The actinomycetes are extremely common gram-positive bacteria in the soils of nature, and there are more than 400 known species. Since most of them have the ability to produce antibiotics, they have been applied to the control of crop diseases from the earliest 1943 years. Wasksman's report has so far been more than half a century. Similar cases of successful development are mostly based on the production of antibiotics. The most commonly known are streptomycin (streptomycin) applied to a variety of fruits and vegetables and the treatment of bacterial diseases. In addition, actinomycetes can also decompose organic matter and produce extracellular enzymes to decompose protein, cellulose, lignin, and crab shells. Therefore, this property can be used to deal with microorganisms with chitin cell walls. For example, the addition of chitin to the soil can control fusarium, mainly because the chitinase enzyme secreted by actinomycetes can cause the dissolution of pathogenic mycelium.
What are the benefits of using small molecules of water-soluble chitin and actinomycetes on orchids?
At the same time, using chitin and actinomycetes to water orchids, chitin has a bacteriostatic effect and can promote the growth of actinomycetes, inhibit the growth of Fusarium, and promote wound healing, for example, carbon sickness causing black spots is very effective.
What is the effect of ethylene on orchids?
Orchids are very sensitive to ethylene, as long as 0.01ppm of ethylene can promote Vanda orchid flowers. Second, Southeast Asia is the second largest. Dendrobium, Phalaenopsis, Slipper orchid again, Oncidium is not sensitive to ethylene, the production of Phalaenopsis by 0.09ppm ethylene treatment, you can induce aging, resulting in flower loss and loss of water wilt and other aging symptoms. Ethylene promotes wilting of the tip of the orchid bract and redness of the lips. The early symptoms of aging are transparent buds and petals, and then the veins are prominent and separated, resulting in the loss of small flowers.
In addition, the sensitivity of flowers to ethylene increases with maturity or after dehydration, high temperatures, and diseases.
Why does the potted orchids in the process of storage contain yellow fallen flowers during storage and transportation?
The long-distance loss of lotus seedlings containing leaves and leaves was mainly due to the high ethylene concentration and bacterial infection. Zunhua Agricultural Information Center
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