棉花是比较耐旱的作物。土壤水分过多或地下水位过高均不利棉花的生长发育,是造成棉花减产的主要原因之一。因此,在棉花生育期间雨水较多的长江流域棉区,历来重视开沟排水降低地下水位的工作。但地下 Cotton is a more drought-tolerant crop. Soil moisture is too high or too high ground water adverse growth and development of cotton is one of the main causes of cotton production. Therefore, cotton fields in the Yangtze River where there is more rain during cotton growth have always attached importance to the work of ditching drainage to reduce the water table. But underground