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运用最小二乘原理，提出了三因素随机区组试验结果的二次回归分析法，包括建立试验指标与试验因素间的三元二次回归方程和有关显著性检验。此法开辟了分析因子试验结果的新途径，能从试验结果中提取新的重要信息，从而提高了因子试验结果的利用率。以一猪的饲养试验资料为例，介绍了该法的分析步骤。
Using the least squares principle, a quadratic regression analysis method of the three-factor randomized block test results is proposed, which includes establishing the ternary quadratic regression equation between the experimental index and the experimental factor and the related significance test. This method opens up new avenues for analyzing the results of factor experiments, extracting new and important information from the test results and increasing the utilization of factorial test results. Taking the experimental data of a pig as an example, the analysis steps of this method are introduced.