Comprehensive effects of cu, Pb and Zn in Soil on growth, yield and quality of rice have been studied through a series of pot culture experiments with a 4 level and 3 factor orthogonal design.
采用4水平3因子正交试验设计，通过盆栽试验，用添加法研究了铜、铅、锌及其复合污染的红壤性水稻土对水稻生长、产量、品质的综合影响。
Precept of extractive conditions was designed by orthogonal design, and the results of experiments were discussed with analysis of variance.
用正交设计法设计了菲汀提取条件的方案，并对试验结果进行了方差分析。
The epitaxy experiments are arranged to take advantage of the mathematical method of orthogonal process design.
采用“正交设计”的数学方法安排外延试验，找到多层连续均匀生长的条件。
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