棉花单铃籽棉产量(简称铃重)是产量构成的重要因素,它与产量的偏相关系数大于其它因素与产量的偏相关系数,因此无论是育种还是栽培研究,都十分重视对铃重的调查和研究。但由于调查研究的目的不同,所用方法各异,而执行起来又相当繁琐。北方育种单位为加快育种步伐,常采用南繁北育手段,为抢时间播种,只能采收头喷花,结果中后期铃重不能比较,“加代”任务完成了, Cotton boll weevils cotton yield (referred to as boll weight) is an important factor in yield composition, its partial correlation coefficient with yield is greater than other factors and yield partial correlation coefficient, so whether it is breeding or cultivation research, attaches great importance to the investigation of boll weight And research. However, due to the different purposes of the investigation and study, different methods are used and the implementation is rather tedious. North breeding units to speed up the pace of breeding, often using the means of South Fan North, for grab time sowing, harvesting only the first spray, the results of late bell weight can not be compared, “plus” mission was completed,