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植物缺乏微量元素,生长不良,它还直接间接地影响着人的健康。现在已知人体中有六十多种化学元素,其中必须的大量元素碳、氢、氧、氮、磷、硫、钙、钾、镁、钠和氯占体重的99％以上,其余不到1％为微量元素,共10种,即铁、钴、锌、铜、碘、钼、锰、氟、硒、铬等。它们在人体内含量虽微却有着重要的生理功能。例如,铁是血红蛋白的成分,缺铁时血红蛋白不能合成,造成贫血,儿童只要轻度缺铁,注意力就会明显降低。又如,锌是许
Lack of trace elements in plants, poor growth, it also indirectly affects the health of people. It is now known that there are more than 60 chemical elements in the human body, of which the essential elements carbon, hydrogen, oxygen, nitrogen, phosphorus, sulfur, calcium, potassium, magnesium, sodium and chlorine account for more than 99% of body weight and the remaining less than 1 % Of trace elements, a total of 10 species, that is, iron, cobalt, zinc, copper, iodine, molybdenum, manganese, fluorine, selenium, chromium and so on. Although they are micro-content in the human body has an important physiological function. For example, iron is a component of hemoglobin, iron deficiency, hemoglobin synthesis, resulting in anemia, children with mild iron deficiency, attention will be significantly reduced. Another example, zinc is Xu