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农药引起的食品污染(主要介绍食品中的农药残留问题,本刊已有不少介绍,故从略——译者)。化学肥料引起的食品污染: 化肥的过度使用可引起环境和食品污染。日本的化肥使用量增长很快,1961～1973年,每10(口亩久)水稻使用的氮肥增长14%,磷肥增长52%,钙肥增长21%。关于化肥引起的环境污染和对人体的影响,美国曾有报道:伊利诺州台卡多市周围农田大量氮肥流失在河湖之中。使市内的水道水被硝酸盐严重污染。由于肠内某种细菌的作用,高浓度的硝酸盐转化为亚硝酸盐,在血液中与血红蛋白结合诱发高铁血红蛋白症。患此病者血液氧的运输受到障碍,女孩的死亡率特别高。氮肥的过多使用还可使植物体内过量蓄积硝酸盐,以此作为饲料可使牛患高铁血红蛋白症,引
Pesticide-induced food contamination (mainly on the issue of pesticide residues in food, this article has a lot of introduction, it omitted). Food contamination caused by chemical fertilizers: Overuse of fertilizers can cause environmental and food contamination. The use of chemical fertilizers in Japan increased rapidly. From 1961 to 1973, nitrogen use per 10-acre rice increased by 14%, phosphorus fertilizer by 52% and calcium fertilizer by 21%. On the pollution caused by chemical fertilizers and their impact on the human body, the United States has reported that a large amount of nitrogenous fertilizer in the farmland around Taiwan’s Tucson, Illinois, is lost in rivers and lakes. The water in the city is seriously polluted by nitrates. Due to the action of some kind of bacteria in the intestine, high concentrations of nitrates are converted to nitrites and hemoglobin is induced in the blood by binding with hemoglobin. Oxygen transport in the bloodstream of the patient is hampered and the girl’s mortality rate is particularly high. Excessive use of nitrogen can also make plants excessive accumulation of nitrate, as a feed can make cattle suffering from methemoglobin disease