Abstract

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Title:: Effect of Potassium on the Growth and Development of Pleurotus ostreatus

Author(s):: WEN Qing; AN Yunping; WEI Zhongfang; ZOU Ming; ZHU Wei; SHEN Jinwen; (College of Life Sciences,Henan Agricultural University,Zhengzhou,Henan 450002)

Keywords:: Pleurotus ostreatus; edible fungi; potassium element; biological efficiency

Abstract:: Pleurotus ostreatus “New 831” was chosen as the experimental material,the plate cultivation method and the sterilized cottonseed hull cultivation method were separately applied to study the effect of different potassium contents (plating cultivation method:10,30,50,70,90,100 mmol·L-1;sterilized cottonseed hull cultivation method:250,500,750,1 000,1 250,1 500,2 000,2 500 mg·kg-1) on the growth and the biological efficiency of P.ostreatus.The results showed that the mycelial growth vigor and growth rate of the plating cultured P.ostreatus all increased firstly and then decreased as the potassium content increased,the best growth vigor and the fastest growth rate occurred at 10 mmol·L-1 potassium.The mycelial growth rate and the biological efficiency of the P.ostreatus in cultivated sterilized cottonseed hull all increased firstly and then decreased with the increasing content of potassium,and the fastest growth rate was obtained at 1 250 mg·kg-1 potassium content,and the highest biological efficiency was obtained at 1 000 mg·kg-1 potassium content.The fruiting time initially decreased and then increased with the increasing content of potassium,the shortest fruiting time (41 days) occurred at 1 250 mg·kg-1 potassium.The comprehensive results indicated that the optimal potassium contents for the plating cultured P.ostreatus and the sterilized cottonseed hull cultivated P.ostreatus were 10 mmol·L-1 and 1 000 mg·kg-1,respectively.