Volume 9 Part 1 Article 40: A Study on Spawning by the Injection Technique

Volume 9 Part 1 Article 40
Year 1976
Title: A Study on Spawning by the Injection Technique
Author: C. Saito


My study concerns the mechanization of spawning on log-wood for “Hodagi” for the purpose of heightening efficiency and effectiveness in the culture of edible Shii-ta-ke (Lentinus edodes).

The purposes and targets set for this study, which are interrelated, are basically the following five points.
Firstly, it goes without saying that the basic purpose in the culture of edible Shii-ta-ke lies in most effectively utilizing the spawn obtained by pure culture and in minimizing the loss of precious log-wood for “Hodagi.” For this purpose, the target was set on eliminating a loss of log-wood for “Hodagi” due to unsuccessful spawning, and on improving the yield of spawning to the maximum level of 100%.

Secondly, the injection technique is adopted in order to modernize the production of “Hodagi” and increase by several times efficiency over manual labor to meet the requirements of Shii-ta-ke growers in our time. In other words, efforts are made to heighten work efficiency by several times by introducing a combination of electrical and hydraulic mechanisms and other units intended for high-speed spawning work and by turning spawning work into a modernized work process consisting of more accurate, safer and quicker operations.

Thirdly, the highly efficient method of mechanized spawning is utilized to increase the number of spawning points two or three times or the density of spawning as against unit area of log-wood for “Hodagi”, while the target was set on reducing to half the period of culture from spawning to the growth of Shii-ta-ke through an integrated combination of culture control, improvements on culture techniques, rationalization of culture equipment and facilities, and other factors, and by solving the question of how it is possible to grow hyphae earlier and most effectively.

Fourthly, the point is to develop the kind of spawn suitable for spawning by the mechanized injection technique. Since the injection method is adopted, it is essential that the spawn should be in a liquid state. Therefore, it is important to develop the kind of spawn which is superior in consistency and lubricity and which would be able to sustain the activity of hyphae for a long time.

Fifthly, it is considered important to develop complete leveling work for the holes made in “Hodagi” for spawning and a complete settlement process after spawning and also to find a proper method suitable for the injection technique, taking into consideration the leveling work for the holes settlement after spawning, and subsequent storage of “Hodagi” and control over them during their ripening period. Therefore, this is taken up as a more or less independent study, and the results of the study are planned to be summed up separately.

The above are the main points in developing the method of “spawning by the injection technique and culture of spawn for the production of edible Shii-ta-ke” and the outline targets set for the study.

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