The mushroom cultivator. A practical guide to growing mushrooms at home

Paul Stamets. The mushroom cultivator. A practical guide to growing mushrooms at home. - Agarikon press, 1983

Содержание

FOREWORD by Dr. Andrew Weil

PREFACE

I. INTRODUCTION TO MUSHROOM CULTURE

II. STERILE TECHNIQUE AND AGAR CULTURE

III. GRAIN CULTURE

IV. THE MUSHROOM GROWING ROOM

V. COMPOST PREPARATION

VI. NON-COMPOSTED SUBSTRATES

VII. SPAWNING AND SPAWN RUNNING IN BULK SUBSTRATES

VIII. THE CASING LAYER

IX. STRATEGIES FOR MUSHROOM FORMATION (PINHEAD INITIATION)

X. ENVIRONMENTAL FACTORS: SUSTAINING THE MUSHROOM CROP

XL GROWING PARAMETERS FOR VARIOUS MUSHROOM SPECIES

XII. CULTIVATION PROBLEMS AND THEIR SOLUTIONS: A TROUBLESHOOTING GUIDE

XIII. THE CONTAMINANTS OF MUSHROOM CULTURE: IDENTIFICATION AND CONTROL

XIV. THE PESTS OF MUSHROOM CULTURE

XV. MUSHROOM GENETICS

APPENDICES

GLOSSARY

BIBLIOGRAPHY

INDEX

PHOTOGRAPHY AND ILLUSTRATION CREDITS

ACKNOWLEDGEMENTS

OCR
The Mushroom Growing Room/73
undersizing the exhaust vent, which should be no larger than half the size of the fresh air inlet. Free
swinging dampers operating on overpressure are widely employed in the mushroom growing industry. The outlet should be screened from the inside to prevent the entry of flies.

Heating
Heating systems for cropping rooms can be based on either dry heat or live steam. Dry heat
refers to a heating source that lowers the moisture content of the air as it raises the temperature.
These systems utilize either hot water or steam circulating through a closed system of pipes or
radiator coils. Heating systems can also be simple resistance coils or baseboard electric heaters.
Heat coils are placed in the air circulation system ahead of the fan as shown in Figure 73. Small portable space heaters can also be attached to the mixing box or placed on the wall under it. Otherwise,
baseboard heaters can be installed along the length of the side walls and matched with the air circulation design shown in Figure 75.
Heat supplied by live steam has the advantage of keeping the humidity high while raising the
temperature of the room. If regulated correctly, steam can maintain the temperature and relative humidity within the required ranges without drawing upon other sources. Nevertheless, a backup heat
source is advantageous in the event humidity levels become too high. For steam heat to function
properly it should be controlled volumetrically by adjusting a hand valve (rather than simply on and
off). Vaporizers well suited for small growing rooms are available in varying capacities, and can be
fitted with a duct that connects with the air system downstream from the fan and filter.
To avoid high energy consumption and the expense associated with equipment purchase,
operation and maintenance, the growing room should be designed to take full advantage of the heat
generating capabilities of the substrate. This is done by matching the air-to-bed ratio to the type of
substrate. Growing on thin layers of grain can be done with a ratio of 4:1 (or less) whereas compost

demands 5:1. The influence of the outside climate and its capacity for cooling the growing room
should also be considered. All these factors must be evaluated before a growing environment with
efficient temperature control can be constructed.

Cooling
Commercial farms use cooling coils with cold water or glycol circulating through them. The
coils are placed before the fan as shown in Figure 73 and are supplied by a central chiller or underground tank and well. Other systems use home or industrial refrigeration or air conditioning units
that operate with a compressor and liquid coolant filled coils. These units are positioned to draw in
recirculated as well as fresh air. All these systems share the common trait of drawing warm air over a
colder surface. In doing so, moisture condenses out of the air and in effect dehumidifies the room.
The oldest and most widely practiced method of cooling is through the use of fresh air. Cooling
with fresh air depends upon the weather and the temperature requirements of the species being cultivated. However, its use is the most practical means available to the home cultivator. In climates
with high daily temperatures, fresh air can be shut off or reduced to a minimum during the day and

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