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1 不施硝态氮肥 施用硝态氮肥后,会使蔬菜中硝酸盐的含量成倍增加,易引起人体血红蛋白变性,使脑、心脏等器官缺氧,呼吸中枢麻痹。硝酸盐还会在人体内还原成亚硝酸盐,产生亚硝胺,此乃一种毒性很强的致癌物,有可能引起消化系统的癌症,如食道癌、胃癌等。故蔬菜应选择铵态氮肥施用。 2 不施含氯肥料 菜田施用含氯肥料,铵、钾等营养元素被土壤吸附或作物吸收后,氯离子残留在土壤中。当其达到一定浓度时,会对作
1 Nitrification Nitrogen fertilizer Application of nitrate nitrogen fertilizer, the content of nitrate in vegetables will double, easily lead to human hemoglobin degeneration, the brain, heart and other organs hypoxia, respiratory paralysis. Nitrate will also be reduced to nitrite in the human body, resulting in nitrosamines, this is a highly toxic carcinogen, may cause digestive cancer, such as esophageal cancer, stomach cancer. Therefore, vegetables should choose ammonium nitrogen fertilizer application. 2 do not apply chlorine fertilizer Vegetable fields with chlorine fertilizer, ammonium, potassium and other nutrients absorbed by the soil or crop absorption, chloride ions remain in the soil. When it reaches a certain concentration, it will do