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在棉花枯黄萎重病圃上连续种植抗病品种，其枯萎病指对皮棉产量的影响，当病指ｘ平均为１３．３４，皮棉产量ｙ平均为９０３．７５ｋｋｇ／ｈｍ２时，回归方程ｙ＝１３２９．６－３１．９５Ｘ，回归系数为－３１．９５，ｔ测验极显著。相关系数ｒ＝－０．８９，极显著。决定系数ｒ２＝０．７９，相关密切。黄萎病指与皮棉产量，当病指ｘ平均为３４．４１，皮棉产量ｙ为９０３．７５ｋｇ／ｈｍ２时，回归方程ｙ＝１０４２．９５－４．０６１ｘ，回归系数－４．０６１，ｔ测验不显著，相关系数ｒ＝－０．１２，相关不显著。
The resistant varieties were continuously planted on the withered and wilt nursery of cotton, and the fusarium wilt affected the lint yield. When the mean value of disease index x was 13.34 and the average lint yield y was 903.75kkg / hm2, the regression equation y = 1329 .6-31.95X, regression coefficient was -31.95, t test was extremely significant. Correlation coefficient r = -0.89, extremely significant. The coefficient of determination r2 = 0.79, closely related. Verticillium wilt and lint yield, the regression equation y = 1042.95-4.061x, the regression coefficient -4.061, t test when the mean x of the disease index is 34.41 and the lint yield y is 903.75kg / hm2 Not significant, the correlation coefficient r = -0.12, the correlation is not significant.