Ecological conditions for the growth and development of Poria cocos

(1) the temperature is on PDA potato, glucose, Agar medium. The spores could germinate at 22-28 ℃, the hyphae could grow at 18-35 ℃, and grew faster at 25-30 ℃. The formation of sclerotia needs the condition of variable temperature with large temperature difference between day and night. The fruiting bodies differentiate and develop at 18 ^-26 ℃, and can produce holding seeds. The hyphae can withstand short-term low temperature (0-5 ℃).

(2) dry sloping land for water cultivation of Poria cocos. However, the growth of Poria cocos requires a water content of 50%, 60%. Therefore, the soil moisture should be maintained at 25%. In the Tsuen period, if the soil moisture is less than 15%, the sclerotia is easy to crack, in addition to strengthening soil cultivation, it should be watered appropriately. But do not have too much water, or you will drown when you get Bodhisattva, and you should pay attention to drainage and waterlogging after rain.

(3) the air Poria cocos is good for gas, so it is necessary to choose places with more sand and less mud as the field. After the cellar is under the section of wood, the overlying soil should not be too thick, otherwise it will affect the air permeability, Poria cocos can not get enough air, and the hyphae can not spread normally.

(4) the sclerotia is harvested by light cultivation, and the sclerotia is composed of hyphae. There is no light for growth and development, but the cultivation with sunlight is to make use of solar heat energy to increase the temperature of gravel in Tsuen field and dissipate heat quickly at night. form a large temperature difference between day and night, which is beneficial to the formation and growth of sclerotia.

(5) the pH mycelium can grow in the range of pH3-7, and 4-6 is better. Weak acid sandy soil is selected, which is beneficial to the function of cellulase secreted by Poria cocos mycelium, and the cellulose in wood is transformed into Bodhisatta polysaccharide and stored in sclerotia.

(6) the main nutrition sources answered were cellulose, hemicellulose and lignin of wood. The felled pine, pine root branches and sawdust are all raw materials for cultivating Poria cocos to provide nutrition to form sclerotia. In addition, the soil environment also provides it with some nutrients.