增施钾肥防治棉花早衰及增产效果试验简报谢志华许恩军黄诚星（济宁市农业科学研究所２７２１００）棉花中后期落叶早衰是近几年来影响济宁地区棉花产量的一大障碍因子。虽然发病原因很多，但忽视钾肥的施用，造成棉田钾素亏缺，是导致棉花落叶早衰的重要原因之一。为了探... Application of Potash Fertilizer in Preventing and Treating Cotton Premature Senescence and Increasing Yield Effect Xie Zhihua Xu Enjun Huang Chengxing (Jining Academy of Agricultural Sciences 272100) Deterioration and declination of cotton in late and middle period are the major obstacle factors affecting the cotton yield in Jining area in recent years. Although many causes of the disease, but neglect the application of potash, potassium deficiency caused by cotton fields, is one of the important causes of premature decay of cotton leaves. In order to explore ...