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在西瓜生产一线,瓜农对生理性病害的认知非常模糊,生理性病害已经成为西瓜生产优质高效的重要障碍。生理性病害发生所占病害发生比率正逐年提高,现将西瓜各种生理性病害的症状及防治方法介绍如下。一、土壤盐渍化障碍1、症状。植株生长缓慢,矮化,叶片叶色深绿,叶缘开始有失水性枯边,继而发展成浅褐色枯边现象,检查西瓜根系有沤根现象发生,地上部植株逐渐失水,造成脱水性枯萎后枯死。2、发病原因。在重茬、连茬、土壤有机肥严重不足及大量、过量施用化肥的地块种植经常发生西瓜营养不良的现象。这是由于长期施用化肥,
Watermelon production line, melon farmers on the physiological disease awareness is very vague, physiological diseases have become an important obstacle to watermelon production quality and efficiency. Occurrence of physiological diseases accounted for the proportion of disease is increasing year by year, now the symptoms of watermelon various physiological diseases and prevention methods are described below. First, the soil salinization disorders 1, symptoms. Plant growth is slow, dwarfed, dark green leaf color, leaf margin began to dehydration dry edge, and then developed into a light brown dry edge phenomenon, check watermelon roots have root phenomenon, the aboveground plant gradually dehydration, resulting in dehydration Withered dead. 2, the cause of the disease. In the continuous cropping, continuous cropping, serious shortage of organic manure and a large number of soil, over-fertilization of land plots often malnutrition watermelon phenomenon. This is due to the long-term use of fertilizers,