句容市丘陵旱地土壤熟土层浅（６～８ｃｍ），养分含量低，钾素养分匮缺明显，土壤中速效钾含量大多在７０ｐｐｍ以下，因此增施钾肥对棉花有明显的增产效应。为了促进棉花生产水平的提高，探索旱地棉花钾肥的最佳用量，１９９７年在句容华阳镇进行了本试验。１材料与方法... The soil layer in the hilly dryland of Jurong City is shallow (6 ~ 8cm), with low nutrient content and obvious deficiency of potassium, and the content of available potassium in the soil is mostly below 70ppm. Therefore, the increase of potassium fertilizer has obvious yield increasing effect on cotton. In order to promote the improvement of cotton production level and explore the best dosage of cotton potash in dry land, this experiment was carried out in Huayang Town, Jurong in 1997. 1 Materials and methods ...