地膜棉花生长期间根系追肥不仅费工，而且效果差。我们根据宁河县大部是重粘土。出南难、保肥力强的土质特点，改进了原来的栽培方式，在地膜棉花生长期间，根部不追肥，将肥料全部底施，经过多次试验取得了较好的效果。1地膜棉花传统栽培方法宁河县地膜棉花栽培一般先铺膜，后 During the growth of cotton mulching film, dressing is not only labor-intensive but also ineffective. We are mostly heavy clay according to Ninghe county. South out of hardships, fertility and strong soil characteristics, improved the original cultivation methods, during the growth of cotton mulch, the roots do not topdressing, the fertilizer at the end of Shi, after several tests achieved good results. A traditional method of cultivation of cotton membrane Ninghe cotton mulching cultivation generally first film, after