1964年我县在洛惠灌区南部的50,000亩棉花样板田,因河淹积水损失,实收获47,961亩。在棉花生长期间,特别是5月和8月两个月,由于长时期的阴雨,造成了许多不良的影响,主要是:①苗期茎枯病流行,大量死苗,一般死苗20%左右,少数田块达70%以上,给全苗密植带来了严重障碍;②生育期显著推迟,现蕾、结铃期约推迟7天 In 1964, the county’s 50,000-mu cotton model paddy field in the southern part of the Luohui Irrigation District lost 47,961 mu of land due to loss of floodwater. During the cotton growing period, especially in May and August, many adverse effects are caused due to the prolonged rainy days. The main reasons are as follows: ① The stem blight epidemics at the seedling stage, a large number of dead seedlings, and generally about 20% of dead seedlings , A small number of plots of more than 70%, to the whole plant close to bring a serious obstacle; ② significantly delayed the growth period, budding, the period of about 7 days postponed