Effects Of Different Light Quality And Light Intensity On The Growth Of Pleurotus Eryngii

Pleurotus eryngii is the main species of mushrooms industrial cultivation in ourcountry. Compared with other edible fungus, pleurotus eryngii is more sensitive tocultivation environment. And environmental conditions are the key factors affecting thequality and yield of pleurotus eryngii. Currently, the study about suitable environmentalconditions of pleurotus eryngii mainly concentrated on the temperature, humidity, air etc.There are fewer reports about the light biological characteristics of the pleurotus eryngii.‘Pleurotus eryngii2’ which is the main cultivar of factory was used to carry out theexperiment, and the red, yellow, blue, green, white LED lamps were used as light source.In order to screen out the best light condition of primordium formation and fruit bodymorphology of pleurotus eryngii, the effects of different light qualities on mycelia growth,primordium formation, fruit body morphology and nutritional quality of the pleurotuseryngii were researched. Red light was selected as the best light quality. The effects ofdifferent intensities of red light quality on the primordium formation and fruit bodymorphology of the pleurotus eryngii were researched too. The major findings weresummarized as follows:1. Pleurotus eryngii mycelia all could grow normally under5different light quality,including red light, yellow light, blue light, green light and white light, and showed whiterand denser. The5different light qualities all inhibit growth of mycelia, and blue lightinhibits the most. In different lights, pleurotus eryngii mycelia could kink and formprimordium. And the primordium formation time and mushroom bud were differenceamong the five lights; the red light was proved the best. In the dark condition, the myceliacould kink, but couldn’t form primordium.2. Different lights had different effects on fruit body morphology of the pleurotuseryngii. The main performances: the red light could significantly increase length offruit-body and thickness of cap, inhibit growth of the diameter of cap. But the blue rightcould significantly inhibit the growth of length of fruit-body and thickness of cap andpromote the diameter of cap growth.3. The biological efficiencies of green light, yellow light, red light and white lightwere57.60%、54.35%、52.71%and48.60%, respectively. There were no significantdifference among the treatments. The biological efficiency of blue light was28.88%, significantly lower other treatments.4. Different lights had different effects on nutrients of pleurotus eryngii. The blue andwhite light treatments’ crude protein, crude ash content was significantly higher than other’.The content of crude protein and crude ash was the highest under blue light, and which wasthe lowest under the red light.5. When the red light intensity in the range of300lx~800lx，pleurotus eryngii couldform primordium and develop mushroom bud. In500lx primordium formed fastest. Themorphology of mushroom bud was not significant among the different treatments. Thelight intensity between400lx~600lx was the best in the period of primordiumdifferentiation.6. There were no significant effects on length of stipe, diameter and thickness of capin different light intensity treatments. The thickness of cap in600lx was significantlyhigher than other treatments. The average weight of single fruit-body was no significantdifference among the treatments. The biological efficiencies of400lx and600lx were best.