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The aim of the experiment was to obtain information about the yield quantity and quality of 16 cultivated strains of Agaricus bisporus. The ‘Somycel 516’ strain gave the highest yield, whereas the yield from the ‘Sylvan 130’ strain was the lowest. The ‘Hauser A1.5’ was characterised by the highest content of dry matter in all the three yield flushes. An equally high content of dry matter was in the first and second flush of the ‘Italspawn F 50’ strain and in the second flash of the strain ‘Italspawn F 62’. ‘Sylvan S100’, ‘Italspawn F 56’, ‘Irlandzka 501’, ‘Amycel 104’ and ‘Le Lion X13’ were the strains with the lowest content of dry matter in all of the three yield flushes. The size of the carpophores had significant influence on the dry matter content. In the all three flushes, the carpophores with diameter 4.6–5.5 cm were characterized by the lowest dry matter content. [ABSTRACT FROM AUTHOR]

The aim of the studies was to compare yielding ofAgaricus bisporus carpophores of strains, which were cultivated in Poland in previous years and nowadays, as well as dry matter content in them. The following old strains were investigated: 'Hauser A6', 'Hauser A6.5', 'So-mycel 11', 'Hauser A3.2', 'Somycel 53', 'Somycel 209', 'Somycel 91' and 'Hauser A8.8'. From among new strains 'Amycel 29', 'SP-251', 'SP-252', 'Amycel 2200', 'SP-312', 'Italspawn F59', 'Polmycel 29' and 'Polmycel 31' were tested. It was recorded that the yield of old strains varied from 17.3 to 23.7 kg⋅m-2. The biggest yield was given by 'Hauser A8.8' strain. New strains gave the yield from 16.9 to 23.6 kg⋅m-2. The biggest yield of carpophores was obtained from 'Amycel 2200', 'SP-251', as well as 'Polmycel 29' strains. Dry matter content of old strains varied from 8 to 9.6%. Three strains, i.e. 'Hauser A6', 'Somycel 11' and 'Somycel 53' were characterised by dry matter content of above 9%. Dry matter content of new A. bisporus strains was lower than of earlier cultivated strains and varied from 7.1 to 8.4%. [ABSTRACT FROM AUTHOR]