生物学效率是指食用菌鲜重与所用的培养料干重之比，常用百分数表示。如100kg干培养料生产了80kg新鲜食用菌，则这种食用菌的生物学效率为80%，生物学效率也称为转化率.
关键词 : 不同氮源 ; 覆土 ; 生物学效率 ; 产量 [gap=3268]Key words : Nitrogen source ; Covering ; Biological efficiency ; Yield
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不同酒精浓度处理、后熟期、覆土厚度、覆土模式直接影响杏鲍菇生物学效率的高低。
The different alcohol concentration, method and thickness of casing soil effect directly the biological efficiency of Pleurotus errngii.
产量高而稳定，棉籽皮的生物学效率为40.0～55.5％，稻草和麦秸为25％左右，是适合我国北方地区栽培的草菇优良菌株。
The biological efficiency on cotton hulls is 40.0—55.5% and about 25% on rice straw or wheat straw. GV34 strain is a good one that is optimum for the north area of China.
方法将携带P 16基因的腺病毒体外转染人膀胱癌t 24细胞，观察腺病毒对T24细胞的转染效率以及P 16基因修饰的T24细胞体外生物学特性的改变。
Methods P16 genes were delivered to the T24 cells jn vitro by adenovirus vectors. Gene transfer efficiency and changes of biological specificity of T24 cells were analyzed.
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