【摘要】 采用协方差分析方法,对油菜田除草剂的试验结果进行了分析。结果表明,与按单因素试验方差分析相比,协方差分析方法可以减小因杂草田间分布不均匀而导致的调查误差。针对随机取样中的各样方内杂草数目不一致问题,讨论了统计控制方法在除草剂药效评价中的重要性以及计算过程。更多还原

【Abstract】 Covariance analysis was used to analyze herbicide efficacy data from rapeseed experiments. When com- pared with single factor analysis of variance,covariance analysis reduced efficacy evaluation error resulting from uneven weed distribution in the field. This paper deals with the problem of non-uniform weed numbers obtained with all types of random sampling methods,discussing the importance of statistical control methods in herbicide efficacy evaluation and showing pertinent calculations.更多还原