The relationship between the proportion of nutrients and the yield of Pleurotus ostreatus

Pleurotus nebrodensis is a newly developed mushroom. There are many problems in cultivation techniques, especially in yield. According to the cultivation practice of Pleurotus nebrodensis in recent years, it was found that the nutrient ratio of culture medium played an important role in the yield of Pleurotus nebrodensis.

Pleurotus nebrodensis

The nutrient components in the culture medium should be mainly organic nutrition and supplemented by inorganic nutrition, which is helpful to strengthen the aftereffect of Pleurotus nebrodensis. Organic nutrition to bran, corn flour, rice bran, etc., generally accounted for 20% to 30%, the amount should not be too large. Organic nutrition content is too large, will greatly increase the pollution rate, but also affect the permeability of the culture medium, resulting in slow mycelium growth, delayed fruiting. Inorganic nutrients are generally potassium dihydrogen phosphate, magnesium sulfate, etc., generally accounting for 0.2% to 0.5%. Too much inorganic nutrition will affect the ability of hypha to absorb water.

It should be emphasized that to increase the yield of Pleurotus nebrodensis, in addition to improving the nutrient content of the culture medium, it is also necessary to ensure that the water absorption capacity of the culture medium is strong. The cotton seed hull with short lint is weak in water absorption capacity under the general condition of the prior conventional cotton seed hull, and when the mushroom is cultivated by utilizing the cotton seed hull with short lint, the fruiting body cannot obtain sufficient water during fruiting period, so that the commodity property and specification of the fruiting body are difficult to guarantee, not to mention high yield. In this case, the culture medium can be adjusted appropriately, and 30%~50% of the raw materials with strong water absorption such as cotton seed lint and corn heart can be added to the cotton seed shell, which not only enhances the water absorption capacity of the culture medium, but also saves the cost. For cultivating Pleurotus nebrodensis, the suitable moisture content of culture medium should be 60%~65%. Specifically, the ratio of material to water can be controlled at 1∶1.5-1∶1.6 before fermentation of culture medium, and the ratio of material to water can be controlled at about 1∶1.3 before inoculation.

Practice proved that adding a certain amount of lime to the culture medium can promote the rapid growth of Pleurotus nebrodensis, and the addition amount of lime is controlled at 2%~5%, so that the pH value can be generally maintained at 8~9 after the fermentation of the culture medium is completed. No lime can also be, but hyphae growth will slow down, the fruiting season has a greater impact on the reasonable arrangement.

In short, the reasonable proportion of culture materials is very flexible, should be based on local resources, scientific adjustment, try to increase the yield and commercialization of Pleurotus nebrodensis to a satisfactory level.