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[目的]为了明确不同的播期、钾肥和钙硼比例对油菜根肿病的控制效果。[方法]通过3因素5水平二次通用旋转组合设计方案,建立回归模型及对其进行解析、寻优和频数分析。[结果]结果表明,所设各试验因素对油菜根肿病控病效应的大小顺序为播种期(X1)>钾肥(X3)>钙硼比(X2)。[结论]3因素对防治油菜根肿病的最优配比方案:播种期为10月10日或者11日,钙硼比[氢氧化钙Ca(OH)2/硼砂]比值为26.85,钾肥(KCl)8.37 g/m2。
[Objective] The purpose was to determine the control effects of potash and calcium-boron ratio on rape clubroot disease in different sowing dates. [Method] The regressive model was established and its analysis, optimization and frequency analysis were carried out through the combination of three factors and five levels of quadratic universal rotation. [Result] The results showed that the order of disease control effect of each experimental factor on rape root disease was sowing period (X1)> potassium fertilizer (X3)> calcium to boron ratio (X2). [Conclusion] The optimal ratio of 3 factors to control clubroot disease was as follows: the sowing period was October 10 or 11, the ratio of calcium to boron [Ca (OH) 2 / borax was 26.85, KCl) 8.37 g / m2.