缺素对平菇菌丝生长速率和菌落形态的影响

INFLUENCES OF MINERAL ELEMENT DEFICIENCY ON THE MYCELIAL GROWTH RATE AND COLONIAL MORPHOLOGY OF PLEUROTUS OSTREATUS

当合成培养基中分别缺乏氧、磷、钾、钙、镁及硫元素时，平菇菌丝的干重增加受到不同程度影响，以缺磷时为最严重，其次是缺氮等。除钙外，其它五种的缺乏都导致菌落形态发生特定改变，菌落扩展速度也不同，仍以无磷、无氮时受影响最大。

Omission of N,P,K,Ca,Mgor S element from the defined medium reduces the dry bilmassyield of Pleurotus ostreatus mycelial growth, especially on“一P”medium, then on“一N”and“一Mg”. The colonial morphologies are changed characteristically and the colonial expansion rates todifferent extent too。 Those on“一P”and“一N”media are changed greatest among all the six treat-ments,and then on“一K”medium。