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Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (1): 232-237.doi: 10.11924/j.issn.1000-6850.2013-1121

Special Issue: 食用菌 食用菌

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Analysis on Effect of 4 Kinds of Heavy Metals on the Yield and Quality of Pleurotus ostreatus Different Harvest Times

  

  • Received:2013-04-17 Revised:2013-05-25 Online:2014-01-05 Published:2014-01-05

Abstract: In order to provide reliable advice on edible fungus production quality and safety, and promote the sustainable development of the edible fungus industry, with Pleurotus ostreatus as a medium, the study was executed by adding 4 kinds of heavy metals at different concentrations into the medium in order to research the effect of heavy metals (Pb, Cd, As, Hg) on the yield and quality of the different harvest times of Pleurotus ostreatus. The results showed that except for 50 mg/kg As postpones the expected fruiting date by 8 days, the three other heavy metals (Pb, Cd, Hg) in different concentrations can advance the expected fruiting date by 5 to 13 days. By adding different concentrations of Pb, Cd, As, Hg in the medium (except for 50 mg/kg As), Pleurotus ostreatus yield can be increased. In detail, the increasing effect of 0.05 mg/kg Pb, 1 mg/kg Pb, 1 mg/kg As and 10 mg/kg Pb was apparent. Except for 50 mg/kg As reduced Pleurotus ostreatus biological efficiency by 15.3%, other different concentrations of heavy metal (Pb, Cd, Hg) can apparently increase the biological efficiency. The highest was 89.2%, processed by 0.05 mg/kg Pb, which was 42.4% higher than the reference substance. In addition, correlation and principal component study results showed that the lower Pleurotus ostreatus yield was, the higher content of heavy metals was, as well as the concentration coefficient; the higher the heavy metal content in the medium was, the higher its content in the later harvest times was, as well as the concentration coefficient. The cumulative effect of heavy metals Pb, Cd, As, Hg was apparent in Pleurotus ostreatus.