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试验结果表明,棉花黄萎病群体损失,病指为5.0—53.0时,皮棉损失率为7.60—38.53%.回归分析的结果,棉花皮棉产量损失率(Y)与黄萎病群体病指(x)之间的关系,可用下述回归式来表示:y=0.659+0.63x±7.92 r=0.8557 n=8调查结果还表明,在黄萎病田里,棉花对病害为害的补偿能力,在湖北天门和河北丰南分别为23.5%和24.8%。自然补偿作用主要表现在总铃数的增加上,而与单铃重,衣分之间的补偿关系不明显.
The results showed that the loss rate of lint cotton was 7.60-38.53% when the disease index was 5.0-53.0. The regression analysis showed that the yield loss rate (Y) of cotton lint and the disease index (x ) Can be expressed by the following regression formula: y = 0.659 + 0.63x ± 7.92 r = 0.8557 n = 8 The results also show that in Verticillium wilt field, cotton compensation for disease damage in Hubei Tianmen and Fengnan in Hebei were 23.5% and 24.8% respectively. The role of natural compensation mainly in the increase of the total number of bolls, but with a single boll weight, the compensation between the insignificant insignificant.