Micronutrients - Micronutrients

Japanese: 微量要素 - びりょうようそ（英語表記）micronutrient

A general term for elements essential for plant growth that are present in concentrations of 0.01% or less. These elements, such as iron, manganese, copper, boron, zinc, molybdenum, and chlorine, are contained in many enzymes found in plants and are involved in the oxidation-reduction reaction of substances within the plant body. Although the concentrations are low, a lack of these elements causes specific deficiency symptoms in plants and significantly impairs growth.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

植物の生育に必須の元素のうち，含有率が 0.01%以下の元素の総称。鉄，マンガン，銅，ホウ素，亜鉛，モリブデン，塩素などで，植物中に見出される数多くの酵素に含まれ，植物体中での物質の酸化還元作用に関与している。含有率は低いがこれらが欠如すると植物に特有の欠乏症状が発現し生育が著しくそこなわれる。

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