１９９７ －１９９８ 年研究了砂姜黑土区不同叶枝留量对棉花产量的影响，结果表明，留叶枝与常规整枝相比单株成铃增多，铃重大，成铃时空分布合理，烂铃减少，优质铃增加－ 但不同叶枝留量效果不同，Ｔ４ 效果最好，皮棉增产３１－５％ ，霜前花率提高１６－６％ － The results showed that the boll number per plant increased, the boll weight was larger, the distribution of bells was reasonable, the boll weight was reduced, the quality of the bolls was better than that of the conventional ones The bolls increased - but the effect of different leaf stocking was different, T4 had the best effect, the lint yield increased 31-5% and the frost bloom rate increased 16-6%