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Friday, June 3, 2011

"Orchid"The need for light


Light is a very important factor for the life of orchids, namely to the process of photosynthesis that produces energy for growth and flower production.
Each type of orchid requires a different light depending on where they live in their natural habitat.
The need of light consists of light intensity and duration of irradiation. Morning sunlight is very important for all types of orchids.

Do orchids get enough light, can be seen from the color of its leaves.
If the light green or bright green and the young leaf shoots look a bit shiny then they will get enough light orchids.
If the dark green, indicating the lack of light orchid tsb.
And if a little reddish or purplish orchid signifies they will receive maximum light capable of receiving, that added intensity, then the leaves will burn.

Light intensity is often measured in units of foot-candles (fc), where in theory a foot-candles = bright light received from a candle with a distance of 1 foot (30.48cm).
For comparison, the light outside my house at noon kira2 more than 10,000 fc, while inside the house about 50 fc.

The intensity of light that is actually difficult to measure with our eyes because the eyes will easily adapt to the lighting around it. To be able to use Light Meters measure commonly used in photography, but are quite expensive.

As a rule base
At 1500 fc, all species of orchid can survive, but not all can grow well and bloom. 1500 fc is 15% of the bright sunlight, for example: under a shady tree all day.
To 5000 fc, the type of orchids that require bright light to bloom. 5000 fc is 50% of sunlight, for example: open space with air condition cloudy. 

Only a few types of orchids that can grow well below and above 1500 fc 5000 fc.

In general, the needs of light to masing orchid species can be grouped as follows
Very bright light (full sun) without direct sunlight is blocked for more than 6 hours, equivalent to more than 5000 fc.
Bright light (high light) without direct sunlight is blocked for 4-6 hours (direct sunlight in the morning and evening and sheltered at midday) or all day if cloudy conditions, about 3000-5000 fc or 50% -70% under the auspices of (shade).
Light medium (medium light) without direct sunlight is blocked about 4 hours or indirect sunlight all day, about 2000-3000 fc or 70% -80% shade.
Light shade (low light) kira sunlight for 1-2 hours (in the morning), about 1000-2000 fc or 80% -90% shade.
Very light shade (full shade) sunlight during kira2 1 hour (in the morning) or less each day, about 1000-1500 fc or 90% shade.
Note: The sun's rays at midday lighter / hotter than the morning or late afternoon.

The need of light for each genus is as follows:
Bulbophyllum: light medium
Cattleya: Moderate to bright light
Coelogyne: light to moderate shade
Dendrobium: Moderate to bright light
Cymbidium: very bright light
Oncidium: Moderate to bright light
Paphiopedilum: light to moderate shade
Phalaenopsis: light to moderate shade
Vanda: Moderate to bright light once
Note: The need of light for the genus above is based on the genus in general, there are several species have different requirements.

Due to lack of light
plants become thin and slow growth
leaves are long, thin, limp and dark green.
difficult to flowering or flowering with poor quality (small and few in number.)
To increase the light, move the orchids to a brighter location. But be careful in its transportation since the plants have long been in the dim light, the leaves will burn easily because the light is brighter. Is necessary to adjust gradually.

Most orchids do not like to be moved into place. Each time the plant will be moved to readjust the direction and intensity of light it receives, and all changes related to the environment at his new place.

Since all the energy used to adapt, then there is no growth in these orchids. The more different between the old and new place where the longer period of adaptation. The long duration of adjustment also depends on the type of orchid.

Reddish pigmentation produced by several species of orchids (in trunk, new shoots, leaves) showed that the maximum amount of light needed has been reached.
If the light plus the red pigment produced become more numerous, and eventually the leaves will have dark brown spots or yellowing leaves become burned due to the effects of heat generated at the light.

Due to excess light
leaf cells become damaged and leaf yellowing due to fire.
plants will grow up too fast (not yet reached normal size had stopped growing).
To reduce the light, move to a location that is more shade (under trees) or using a protective roof (paranet) above.

In addition to growth, the light will also affect the direction and shape its growth. The direction of growth of the plant will follow the direction of light sources. For example, stem and flower stalk will grow upward (toward the light source) and the roots will grow opposite the source of light.

Tip: To get the best possible interest rate view, when the buds begin to form on the flower stalk, do not change the direction / location of the pot because it will change the course of flower stalks are leaning towards light sources.

Note: The information above is only a general nature 

Written by : bagus suprinyanto ~ Admin

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