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Detailed Explanation of the Content of Edible Mushroom Spawn Quality Standards
Grade 1 spawn: For oyster mushroom, Hypsizygus marmoreus (shimeji), enoki mushroom, Pleurotus nebrodensis (white lingzhi mushroom), king oyster mushroom, abalone mushroom, and Ferula mushroom, the mycelium is pure white with strong wall-climbing ability; the mycelium is robust and vigorous; the substrate does not shrivel; aerial mycelium does not collapse; and when observed from the reverse side, there are no spots, streaks, or shadows except for the inoculation block point. For shaggy mane mushroom, the mycelium is grayish-white, sparser than that of oyster mushroom, and slightly earthy-yellow after maturation, with the inoculation block showing heavier pigmentation; the rest is the same as oyster mushroom. For straw mushroom, the mycelium is grayish-blue, greatly elongated, and semi-transparent, and after maturation most produce chlamydospores.
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A Detailed Guide to Simple Storage Methods for Edible Mushroom Spawn
Ensuring the storage quality of edible mushroom spawn can effectively preserve its superior strain characteristics and extend the number of years a good variety can be used. Therefore, it is just as important as breeding new varieties and is an indispensable and important part of edible mushroom production. However, formal and strict storage methods require some equipment and also place high demands on operating technique; for many mushroom growers, some simple traditional methods are more feasible and more worth promoting. 1. Low-temperature storage at the bottom of a well. This is a method of storing spawn by using the principle that the bottom of a well has a constant and low temperature, and it is suitable for
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Key Points and Methods of Edible Mushroom Strain Preservation Explained in Detail
Strains are a major biological resource and the primary means of production in edible mushroom cultivation. After a superior strain has been selected and bred, its excellent traits must be kept unchanged, or changed as little and as slowly as possible, so that production performance is not reduced and it can be used in production over the long term. Therefore, strain preservation is of great significance in edible mushroom production. I. Principles of strain preservation There are many methods of strain preservation, but the principles are much the same. First, select excellent pure strains. Use the spores, spore bodies and vegetative forms of microorganisms; second, according to their physiological and biochemical properties,
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Methods and Technical Key Points for Preserving Edible Mushroom Spawn
1. Distilled water method. Suitable for the spawn of oyster mushroom, enoki mushroom, and shiitake mushroom. 1. Preserving oyster mushroom and enoki mushroom spawn. First, move the test-tube spawn that is at the eight-tenths mature stage and awaiting preservation into an inoculation box, and after sterilization, use a medical syringe to inject distilled water through the test-tube stopper until the entire surface of the culture medium is submerged, up to 2 cm from the tube mouth. Seal the tube mouth with mineral wax, and at normal temperature place it upright in a cool, shady place, where it can be preserved for 1-1.5 years. 2. Preserving shiitake mushroom and wood ear mushroom spawn. Use a 150 x 15 mm finger-shaped tube to place solid or
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Methods and Key Techniques for Preserving Edible Mushroom Strains
Two methods are usually used for preservation: the slant low-temperature preservation method. This is the simplest preservation method, in which vigorously growing, uncontaminated slant tubes are placed in a refrigerator and preserved at a low temperature of 4°C~6°C, after which they are subcultured onto fresh slant medium every 2~3 months and, after incubation, preserved again. The other is the liquid paraffin preservation method. In this method, sterilized liquid paraffin is injected in a sterile room into the slant tubes to be preserved, with the paraffin added to a level 1 cm above the slant. Then a wooden stopper or rubber
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How to prevent mushroom spawn degeneration? Practical control methods
Spawn degeneration can lead to slow mycelial growth, weakened resistance to the environment, contaminant microorganisms and so on, an earlier or delayed fruiting body formation period, and indistinct flushes of mushrooms. There are many causes of spawn degeneration, among which impure spawn and gene mutation are the main reasons; in addition, excessively high temperatures and mixed cultivation of different strains can all cause spawn degeneration. Measures to prevent spawn degeneration include: ensuring pure culture of the spawn, taking care not to use spawn contaminated by foreign microorganisms, and not cultivating in close proximity connected to each other; strictly controlling the number of subcultures, reducing mechanical damage,
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Comparative Trial of Six Strains in Substitute-Material Cultivation of Lentinula edodes Using Liquid Spawn
In recent years, China's shiitake (Lentinula edodes) production has developed rapidly, with substitute-material cultivation of shiitake being particularly prominent. The traditional solid spawn production technology for shiitake requires a rather cumbersome three-stage process of mother culture, stock culture and cultivation spawn before it can finally be expanded to the production of cultivation bags. Its high labor intensity, cumbersome process, high rate of contaminant mold infection and long growth cycle all greatly restrict the development of shiitake. In this experiment, liquid spawn of 6 shiitake strains was cultured and compared in cultivation, so as to provide a certain theoretical basis for the promotion and application of liquid spawn for shiitake. 1 Materials and Methods 1
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Several New Methods for Reducing the Contamination Rate of Edible Mushroom Spawn
1. Bottled fermented substrate (1cm). The improved method is: above the culture medium, about 4cm from the bottle mouth, fill in 1-2cm of fermented substrate, then sterilize. Because the fermented substrate itself is sterile, after inoculating the spawn, the mycelium quickly covers the upper part of the whole bottle, and the mycelium feeds on the substrate at the same time. The advantage of this method is that contaminant microorganisms can hardly infect the culture medium, and the spawn age is uniform. The contamination rate can be reduced to below 3%. 2. Wheat grain germination method. The improved method is: let the wheat grains germinate before bottling and sterilizing. The storage substances of wheat grains are mainly starch, fat and protein,
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Simple and Practical Methods for Preserving Edible Mushroom Spawn
While domesticating the wild-cultivated oyster mushroom variety "1015", we subjected the strains to salt-tolerance training. This involved salinizing ordinary PDA medium to prepare a solution at a concentration of 1.0%-1.5%, sterilizing it under high pressure for 45-60 minutes, cooling it to make slants, inoculating under sterile conditions, and culturing in an incubator. After the cultures matured, every 10 tubes were grouped together, placed in polyethylene bags, and stored at room temperature for 9 months before subculturing. The survival rate reached over 95%,
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What are the methods for identifying the quality of edible mushroom spawn?
1 Appearance identification. For users without special equipment, the quality of spawn can be judged by the senses, which is the so-called appearance identification. High-quality spawn should have five characteristics: pure, true, strong, moist and fragrant. Pure means the spawn has high purity, no contamination by foreign microorganisms, no patches, no inhibition lines, and no "spawn regression" or "spawn breakage" phenomenon. True means the hyphae are normal and have the authentic morphological characteristics of the parent. For example, the hyphae are pure white, glossy, grow evenly and neatly, connect into blocks, and are elastic. Strong means the hyphae are thick and robust, with vigorous growth, many and dense branches, and on the culture
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