Central composite rotatable design (CCRD) matrix and the response of dependent variable for chlorpyrifos degradation.

X1 refers to pH; X2 refers to temperature; X3 refers to culture time. The data presented are means of three replicates with standard deviation. Data followed by the same letters in the same column are not significantly different at P = 0.05 level according to the Tukey’s test.

X1代表pH值，X2代表温度，X3代表培养时间。本次呈现的数据为三次重复实验的平均值及其标准差。同列中带有相同字母的数据，经Tukey检验（Tukey’s test），在P=0.05的显著性水平下无显著差异。