Can the concentration of nutrient solution added to edible fungi be too high?
Edible fungi add nutrient solution concentration can be too high.
The concentration of nutrient solution added to edible fungi should not be too high but not too low, and the concentration should be appropriate. If the concentration of nutrient solution is too high, it will not only be difficult for mycelium to absorb, but also hinder mycelium growth; if the concentration is too low, the yield increase effect is not obvious. At the appropriate concentration, the addition should also be determined according to the humidity in the material.
If the humidity of the culture medium is too high, the concentration of nutrient solution can be appropriately increased, the water consumption can be reduced, and the ventilation can be strengthened after supplementing the nutrient solution; otherwise, the concentration can be reduced and the water consumption can be increased. Common concentrations are urea 0.3%~0.5% and potassium dihydrogen phosphate 0.2%.
1. The concentration should be appropriate
When the concentration of nutrient solution is too high, not only is it difficult for mycelium to absorb, but also hinders the growth of mycelium; when the concentration is too low, the physiological effect is not obvious, and the goal of high yield cannot be achieved. At the appropriate concentration, the addition of nutrient solution depends on the moisture content of the culture medium. For example, if the water content of the culture medium is high, the concentration of the nutrient solution should be increased, the water consumption should be reduced, and the ventilation amount should be increased after the addition. On the contrary, the concentration of nutrient solution should be reduced and water consumption increased.
Second, nutrient solution should not be used alone
Several kinds of nutrient solutions should be used alternately frequently to make the nutrients needed for fruit body growth comprehensive and reasonable. If hormones are used to stimulate fruiting body growth, hormonal nutrient solutions should be used after supplementation.
III. Use of nutrient solution according to environmental conditions
When the temperature is above 20℃, it is difficult for hyphae to form high-quality fruiting bodies (except for high-temperature edible fungi varieties), and nutrient solution can not be added. If the temperature is lower than or between the lower limit temperature for fruit body growth, the amount of nutrient solution used can be increased. In addition, the culture material has been infected by miscellaneous bacteria, must first remove the miscellaneous bacteria and then add nutrient solution. In order to prevent contamination by miscellaneous bacteria, a certain amount of bacteriostatic agents can also be added at the same time as spraying nutrient solution to prevent the breeding and spread of miscellaneous bacteria.