Great efforts are being directed to putting mushroom production on a scientific basis in different parts of the country.
The Central Mushroom Research Institute bred over 10 good strains of mushroom appropriate for each season in keeping with climatic features of the country, and established energy-saving culture techniques for them.
Among them are such species suitable for growing in spring and autumn as Lentinus edodes and Plurotus sajor-caju and those in winter including Pholiota nameko and Flammulina velutipes. In particular, Pleurotus abalonus, Volvariella volvacea, Auricularia auricula and Phyllotopsis with good taste and high nutritional value were developed as strains that can be cultivated safely even in summer.
Mushroom farms in each province strive to solve technical problems.
Among their developments are an automatic system for controlling environment for mushroom cultivation and a magnetic water maker.
The system monitors in real time and automatically controls the oxygen content, humidity and illumination which are essential for growing mushroom. After its introduction, mushroom yield has increased by 15 percent as the content of carbon dioxide has been lowered and relative humidity increased in cultivation grounds.
The magnetic water maker magnetizes the water for mushroom to promote its growth. The magnetic water has increased the bud divergence ratio by 10 percent and the mushroom yield as well.
The farm machine research institute under the Ministry of Agriculture contrived a mushroom spawn sowing machine which injects cultured spores into fermentative substrates.
After its introduction, the Pyongyang Mushroom Farm doubled productivity, while preventing environmental pollution.
Unsan County in South Phyongan Province introduced a method of producing mushrooms using a bioactive radiator to increase output while lowering costs.
The radiator decreases the association of water and generates anion. The water treated by the radiator maximizes the moistening degree of substrates for the high penetration to ensure even fermentation of substrates and has sterilizing effects as well. The fermentative substrates made thus nurture mushroom spawns in large quantities in a short period. The radiator has saved the county from using quicklime which was used for producing fermentative substrates and sterilizing cultivation grounds in the past.