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一、不宜单纯施氮肥。西瓜施肥要氮、磷、钾肥配合施用。最好以鸡粪、饼肥、人粪尿、栏肥、草木灰等农家肥为主。 二、不宜施含氯化肥。西瓜施用化肥应选用尿素、硫酸铵、硫酸钾等,切忌施用氯化铵、氯化钾等含氯化肥。 三、不宜干旱施浓肥。天气干旱、土壤含水量低,不要施用浓肥。须先浇水或灌水,使土壤湿润后再施肥。 四、不宜在阴雨天施肥。阴雨天空气湿
First, it should not simply nitrogen fertilizer. Watermelon fertilization to nitrogen, phosphorus and potassium fertilizer with the application. The best chicken manure, cake fertilizer, human waste urine, bar fat, ash and other manure based. Second, should not be applied chloride-containing fertilizer. Watermelon fertilizer should be used urea, ammonium sulfate, potassium sulfate, etc., avoid the use of ammonium chloride, potassium chloride and other chlorine-containing fertilizers. Third, it is not suitable for dry fertilizer. Arid weather, low soil moisture content, do not apply concentrated fertilizer. Must first water or irrigation, make the soil moist and fertilize. Fourth, should not be fertilized in the rainy days. Rainy days wet air