Volume 4 Part 1 Article 17: Controlled Air Movement and its Effect on Cropping Yields

Volume 4 Part 1 Article 17
Year 1960
Title: Controlled Air Movement and its Effect on Cropping Yields
Author: C. Riber Rasmussen


The importance of “air” in relation to mushroom growing is generally known and a number of investigations have been made and conclusions drawn. Carbon dioxide and possibly other “gases” (volatile products) during cropping are considered to be the offenders and in many cases this has been proved. It is also suggested that the retarding effect (crop reduction and abnormally shaped sphorophores) can be overcome by the introduction of a certain amount of fresh air into the growing room. This should ensure that the “gas” concentration is maintained at such a level that no damage occurs (e. g. 1., 2., 3., 4., 5., 6.). Storey and Middlebrook (7) showed that the air/bed ratio in the cropping house influenced cropping yields to a major extent and they suggested that by working at figures of approximately 5 cubic feet free air space to 1 square foot bed area (corresponding to 1.8 cubic metres air to 1 square metre of bed) the highest cropping yields were obtained. It was however, not proved whether an even greater air space would lead to a further increase in yields. These data were found in experiments in three types of houses with natural ventilation only. Consequently air changes throughout the year varied and they could not be kept under control.

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