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Dead wishes

Registered: 05/30/02
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Cultivation of Reishi - taken from MushWorld site
    #1600618 - 06/02/03 06:43 AM (14 years, 10 months ago)

I found this article interesting, so here it comes. all copyrights to the MushWorld site and Mr. Ji-hye Lee.


Cultivation of Reishi (Ganoderma lucidum)

Writer: Ji-hye Lee

(1) Growth Factors

The essential factors for mushroom growth include temperature, humidity and oxygen. In particular, the primordial formation requires high temperature of 30'C and high humidity of 95%. Light and other environmental factors should be manipulated depending on the stages of mushroom growth.

(2) Spawn Run

Mycelia grow at 10'C-38'C, with the optimum mycelial incubation temperature somewhere between 25'C and 32'C. The optimum moisture content of the sawdust substrate is 65 %-70% and that of the log is 40% or so. PH 4.2-5.3. is regarded as optimum. The mycelial growth doesn't necessarily need lighting while fruit body development does plenty of light. However, oxygen is indispensible to mycelial growth since ling zhi is a strict aerobe.

(3) Primordial formation

* Temperature
Ling zhi fruits and develops at 20-34'C, with the optimum temperature 27-32'C. If the temperature is out of the former range, the fruit body may have abortive growth. In particular, if the temperature is lower than 20'C, it produces malformed fruit bodies, with the cap unformed. During the latter stage of fruit body development, you should frequently alter temperature within the above mentioned optimum temperature range in order to produce high quality ling zhi with a thick pileus and tough flesh.

* Humidity
The humidity of the growing room should be maintained at about 90% during the primordial inducing, 70-80% during the cap formation and 30-40% during the final stage of fruit body development.

* Light
During primordial formation and fruit body development, light (50-450 Lux) is required. However, direct light must be avoided. The higher the light intensity, the shorter the stipe may be, the earlier the cap forms. In other words, the stipe gets enlongated and the pileus formation is delayed at low light intensities.

* Ventilation The growing room should be completely ventilated after the cap is formed. In particular, you should control the moisture content by increasing ventilation frequency when the humidity is high.

(4) Cultivation technology

The ling zhi cultivation method can be largely divided into two: the sawdust and the log cultivation. And the log cultivation includes cultivation on long logs and short logs. The ling zhi cultivation on long logs takes much labor and harvesting is possible the year after inoculation. On the other hand, the short log cultivation takes only 4-5 months for mycelial incubation and the fruit body can be cropped in the same year. Accordingly, the quick turnover of capital enables high yield for a shorter time. In this regards, the short log cultivation is more commonly used.

* Candidate Tree Selection and Felling
Ling zhi is a saprophyte which feeds on dead trees. So, you should choose appropriate trees where mycelia and fruitbodies are best grown. The candidate trees believed to be the most appropriate for lingzhi cultivation are oak trees in the family of Quercus: Guercus acutissima, Quercus aliena and Quercus serrata. The felling should be done during the dormant season when the sap flow stops.

* Drying of logs
A newly cut log has about 45-48% moisture. For inoculation, logs should be dried for 40 to 60 days until their moisture content reaches and stays at 40%, the optimum moisture content for mycelial incubation. Most growers pile the logs into a #-shape at a well-ventilated and shadowy place.

* Spawn Inoculation

Inoculating Site
Spawn inoculation should be done in a clean, contaminant-free room, better equipped with an integrated temperature and humidity controlling system and good drainage.
Preparation for Inoculation
Cutting logs requires much labor. You are to prepare bottles of spawn (a bottle per 3-4 logs). You should lay insulating materials and plastic on the ground in order to prevent extreme alterations in temperature. And then, top the plastic covering with sand 5cm thick to help retain moisture content, before piling up the logs in a #-shape.
Spawn inoculation should be done right after the final cutting of logs. And the best time for inoculation is between February and March in Korea. Sawdust spawn is uniformly applied to each log. You may lay logs one on top another up to 1-1.2m in height (Koreans call it Sandwich Incubation).

* Incubation
Short log cultivation, using unpasteurized logs, is highly prone to contamination. Thus, you might want to distribute far more spawn than in long log cultivation, in order to ensure an average yield. It is very important to maintain the optimum environment for the mycelial growth of ling zhi. You should maintain the incubation room temperature at 10-15'C and relative humidity 85-93% for one week after inoculation. Then, raise the room temperature to 20-25'C for strong myclial growth, suppressing the growth of disease or competing fungi at the same time.

If the incubation room is long closed with little air exchange during incubation, mycelial growth might be delayed or their vitality can be weakened due to inappropriate oxygen, temperature and humidity conditions. Accordingly, you need to pay special attention to controling temperature and humidity and allowing free air exchange by ventilating the room once or twice per week, with the plastic cover folded up.

* Burying Logs
You may think that mycelial growth is complete when the little bumps appear. Now, you may bury the logs into enriched soil in the growing room. At first, you are to remove the plastic and water the logs 7-8 times per day for 3-4 days in order to maintain the optimum moisture content. And then, you are to separate the logs one by one and put them onto the soil uniformly, at 15-20cm intervals and with well colonized ends up. Fill sand near the log holes up to the two thirds of the log height and top the logs 2cm high with soil.

* Primordial Formation
After burying logs, you should water twice a day so as to sufficiently wet the dried surface of sand. Maintain indoor humidity around 90-95% and temperature at 26-32'C. In a week, Ganoderma lucidum begin to fruit. If you remove fruit bodies coming out too earlier, you may see the uniform growth of fruit bodies. When they appear too densely, you need to thin out them.

* Cap Formation
As the stipe grows to some degree, the whitish margin of new growth gets thicker and ready to f norm a disk-shape pileus. The cap shows its characteristic horizontal growth with zonations of concentric growth patterns. It tends to orient towards directional light. When the antler-shaped stalk reaches your desired height, the environment should be altered to induce cap development by ventilation within its tolerance limits of temperature. If the ventilation is insufficient, i.e, in high CO2 concentrations, the stipe may be branched. During cap formation, humidity in the growing room should be maintain at lower levels of 70-80% than during primordial formation.

* Dry Growth
When the pileus has grown to some extent, where the white cap margin becomes yellow and its horizontal growth slows and finally stops, the cap grows thicker and thicker. You should stop watering at this time but continue frequent ventilation in order to decrease the humidity to 30-40% (R.H.), keeping the growing room temperature in line within the range from 24'C to 32'C. You may crop the fruit bodies in 10-15 days.

* Harvest
If you delay harvesting, the under side of the cap gets grey and the fruit body loses its weight, sending the mushroom into lower quality. You should keep it in mind that the ling zhi has best of its medicinal effects when it retains pure yellow color on its underside of the cap. To this end, you are well advised to pick the mushroom while it is yellow.


The living ghost of Kykeon

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Re: Cultivation of Reishi - taken from MushWorld site [Re: kykeon]
    #1600637 - 06/02/03 07:09 AM (14 years, 10 months ago)

Good article!

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Re: Cultivation of Reishi - taken from MushWorld site [Re: kykeon]
    #1601156 - 06/02/03 01:06 PM (14 years, 10 months ago)

That photograph of the hall of reshi-shrooms is so beautiful.

Where is it located?

Keep shroomin,

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Dead wishes

Registered: 05/30/02
Posts: 1,506
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Re: Cultivation of Reishi - taken from MushWorld site [Re: GGreatOne234]
    #1604167 - 06/03/03 12:13 PM (14 years, 10 months ago)

i suppose somewhere in Asia rofl kiddin

There is another article too with fantastic pics. Maybe i should link to them in a newer post, i dunno.

The living ghost of Kykeon

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