Why the yield of Pleurotus ostreatus is getting lower and lower?

Recently, many growers have called to consult: why is the production of Pleurotus ostreatus getting lower and lower? It's a lot worse than a few years ago. To this end, the author conducted a survey and found that there are the following problems:

The cultivation environment is seriously polluted and most growers are cultivated in the greenhouse for years. The deterioration of environmental conditions and incomplete disinfection are the main reasons for the reduction of Pleurotus ostreatus production. According to the test, the base of miscellaneous bacteria in the new site is 63.95 per square meter, 95% of bacteria, and 150 colonies per square meter. After the end of the first cultivation, the number of miscellaneous bacteria will be 20 times higher than before, these miscellaneous bacteria control the growth of Pleurotus ostreatus to some extent, the more times of cultivation, the lower the yield. In addition, the metabolism of Pleurotus ostreatus also has certain control over its growth. Therefore, the cultivation site had better be changed every 2-3 years or stagger the cultivation season in a planned way. Can also imitate the southern model, local bacteria, off-site mushroom.

At present, the main raw material for the cultivation of Pleurotus ostreatus is cotton seed shell. the latest data show that due to the continuous progress of science and technology and the continuous updating of equipment in cotton oil factories, the utilization rate of products is getting higher and higher, and the nutritional composition of cotton seed shell is getting less and less. Moreover, the cotton seed shell is also divided into many grades, such as large shell short velvet, medium shell medium cashmere, small shell long wool and so on. Except for professional big families, the vast majority of growers do not know the secret. I think as long as it's a cottonseed shell. The cotton seed shell with large shell and short cashmere has less water content and low nutrient content, so it is difficult to send out the second tide mushroom because of the lack of water in the material, while the cotton seed shell with small shell and long velvet has high water content, rich nutrition and high yield, and the difference between the two yields is about 20%.

The problem of strain quality in agricultural production, it is well known that good seedlings can be planted. In the production of Pleurotus ostreatus, the quality of bacteria is the key to directly affect the yield and benefit. The quality of bacteria is difficult to identify intuitively, two or two bottles of bacteria full of culture medium, there is no difference in appearance, but its technical content and experimental investment are completely different. In addition to large professional families, the vast majority of growers buy third-class species, while most of the units and individuals producing third-level species are scattered in rural areas, and the sources and production conditions of bacteria are confused, and the phenomenon of blind expansion and adulteration is very common. The mycelium of edible fungi has the characteristics of unlimited growth, the more the number of cell division, the higher the degree of aging, the more variation; the more times of expansion, the greater the production, the higher the degree of aging, the more variation. For the sake of profit, some people buy back the mother seed from scientific research institutions, expand it at will, and use it all the year round, which is also one of the reasons for the decline in the production of Pleurotus ostreatus.