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对照的设置因试验的目的而异。对照必须有可比性,对试验结果的评价才不致产生偏差;如对照选择不当,不仅达不到试验目的,甚至导致得出错误的结论。选择对照必须注意两个问题,一是和谁比,二是怎样比,通常主要的毛病是随便、盲目地选用对照。现就林木良种选育工作中对照设置问题谈点看法:1.选优时用同一品种、类型作对照由
The setting of the control varies according to the purpose of the test. The control must be comparable, the evaluation of the test results will not lead to bias; such as the control of improper choice, not only failed to achieve the purpose of the trial, and even lead to the wrong conclusion. Choice of control must pay attention to two issues, one is with whom, the second is how the ratio, usually the main problems are casual, blindly choose the control. Now on the selection of trees seed selection control work talk about the point of view: 1. Selection of the same species, the type of control by