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许多人重视施化肥,轻视施有机肥,重视施氮肥,忽视施磷钾肥,造成营养元素之间比例失调,缺少磷钾日益严重,降低了增产效果和经济效益。据湖南省土壤普查结果,水稻田缺氮面积占13.4％,缺磷面积占45.2％,缺钾面积占37.3％。 我国是世界上氮肥施用量最多的国家,占世界氮肥用量的20％,占亚洲的50％;而钾肥用量却只占世界的1.6％,占亚洲的15％。由于长期偏施氮肥,土壤中磷、钾耗费多,肥力下降,病虫害加剧,影响产量和品质,
Many people value chemical fertilizers, treat organic fertilizers lightly, emphasize nitrogenous fertilizers, neglect phosphorus and potassium fertilizers, and cause the imbalance between nutrient elements. The lack of phosphorus and potassium is aggravating day by day, reducing the stimulation effect and economic benefits. According to the results of the Hunan Province Soil Census, nitrogen deficiency accounted for 13.4%, phosphorus deficiency accounted for 45.2%, potassium deficiency accounted for 37.3%. China is the country with the largest amount of nitrogenous fertilizer in the world, accounting for 20% of the world’s nitrogenous fertilizer use, accounting for 50% of Asia’s. However, the amount of potash fertilizer only accounts for 1.6% of the world’s total, accounting for 15% of Asia’s. Due to the long-term partial application of nitrogen fertilizer, soil phosphorus and potassium consumption more fertility decline, pests and diseases intensified, affecting yield and quality,