The multiple regression between every strain index and the three - factor were analyzed . it showed that buffer capacity and salinity were dominant factors for all the strain indexes ; ph was obviously less important factor and even can be neglected in some cases 用此三因素与诸项胁变指标间进行三元线性回归分析，结果表明缓冲量和盐度是不可缺少的决定性主导因素， ph作用次之，有时甚至可以忽略。
