Physicochemical Characters of Salt-affected Casing Materials and Their Effect on the Growth of Agaricus bisporus
GUO Shang,NAN Xiaojie,LIU Xiuzhen
Physicochemical Characters of Salt-affected Casing Materials and Their Effect on the Growth of Agaricus bisporus
Selected physicochemical characteristics of six different casing formulae (Ⅰ:66.7% peat,33.3% salt-affected soil;Ⅱ:50% peat soil, 50% salt-affected soil;Ⅲ:each cubic meter of salt-affected soil supplemented with 45 kg waste vinegar residue;Ⅳ:each cubic meter of salt-affected soil supplemented with 45 kg cereal chaff;Ⅴ:each cubic meter of salt-affected soil supplemented with 45 kg sorghum husk;control: 100% peat) were determined, and their effects on the growth and fruiting of Agaricus bisporus were evaluated.A gradual increase in electrical conductivity (EC) was recorded for formulae Ⅰ and Ⅱ during the period from casing to harvesting of the first flush (~17 d), and high EC values (1427~1980 s/cm) were recorded for formulae Ⅲ~Ⅴ;EC values of formulae Ⅰ~Ⅴ then decreased significantly after the third flush harvest (42 d).Six days after casing, the pH values of formulae Ⅰ~Ⅴ ranged between 7.47 and 8.47, values which were significantly higher compared with the control.In the case of formulae,Ⅰ and Ⅱ, the period from casing to full colonization of the growth substrate was the same as the control but was three days longer when formulae Ⅲ~Ⅴ were used.With all casing formulae, the harvesting period was five days for both the first and third flushes, whereas second flush harvesting times varied slightly depending on the formula adopted.Casing formulae Ⅰ~Ⅴ all generated higher yields compared with the control, with the highest yield (21.3 kg/m2) obtained with formula Ⅲ.Our data indicated that salt-affected soil combined with peat, waste vinegar residue, cereal chaff or sorghum husk can be used as the casing material for A.bisporus production.
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