目前,在大面积棉花生产上,一播保全苗技术还不过关。绝大部分棉田,每年总有不同程度的缺苗。因大量缺苗断垄而不得不补种移栽的棉田比例,常不下三分之一至二分之一。气候反常年份,棉田缺苗断垄情况甚至还严重些。由于不能一播全苗,带来很多不良后果,造成一系列被动。诸如三类苗比例激增,棉苗发育推迟,密度得不到保证,面积完不成计划,全国棉区每年由此浪费了大量棉种和劳力,也影响了棉花产量。调查分析各地棉花缺苗断垄的原因,总 At present, in a large area of ​​cotton production, a broadcast security technology does not pass. Most cotton fields have different degrees of lack of seedlings every year. The proportion of cotton fields that have to be planted for transplanting due to the large number of seedlings missing is often not lower than one-third to one-half. Climate anomalous years, scarce cotton paddy off the situation even worse. Because it can not be broadcast seedlings, bringing many adverse consequences, resulting in a series of passive. Such as the proportion of three kinds of seedlings surge, postponed the development of cotton seedlings, density can not be guaranteed, the area can not be completed, the national cotton area each year wasted a large number of cotton and labor, but also affected the cotton yield. Investigate and analyze the reasons for the lack of cotton seedlings breaking the ridge around the total