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一、缺钾症缺钾时,植株生长缓慢,茎蔓细弱,叶面皱曲,老叶边缘变褐枯死,并逐渐地向内扩展,严重时还会向心叶发展,使之变为淡绿色,甚至叶缘也出现焦枯状,坐果率很低,已坐的瓜,个头也小,含糖量不高。补救措施:一是每亩用硫酸钾5—10公斤(苗期缺钾,每亩用3—5公斤;伸蔓后每亩用8—10公斤)或草木灰30—60公斤开沟埋施;二是用0.4%-0.5%硫酸钾溶液叶面喷施。二、缺磷症缺磷时,根系发育差,植株细小,叶片背面呈紫色,花芽分化受到影响,开花迟,成熟慢,而且
First, potassium deficiency potassium deficiency, slow plant growth, thin stems and crannies, leaf folds, browning the edge of the old leaves and gradually inward expansion, severe heart will be the development of leaves, making it light Green, and even fringes also appear coke-like, fruit setting rate is very low, has been sitting melon, a small head, sugar content is not high. Remedy: First, 5-10 kilograms of potassium sulfate per acre (seedling potassium, 3-5 kg per acre; after stretching Manchuria 8-10 kg per mu) or ash 30-60 kg ditching facilities; The second is 0.4% -0.5% potassium sulfate solution foliar spray. Second, phosphorus deficiency Phosphorus deficiency, poor root development, plant small, purple leaves on the back, flower bud differentiation is affected, flowering late, mature slowly, and