| 释义 |
micronutrient Biol.|ˌmaɪkrəʊˈnjuːtrɪənt|
[f. micro- + nutrient n.]
Any of the chemical elements which are required by plants (or, less commonly, animals) in trace amounts for normal growth and development.
1943Ann. Rev. Biochem. XII. 525 List of essential micronutrients.—The essentiality of boron, manganese, and zinc for higher plants is no longer open to dispute. 1953J. Ramsbottom Mushrooms & Toadstools viii. 80 Manganese, zinc, boron, copper, molybdenum, have been proved definitely to be micro-nutrients for certain fungi. 1970[see macronutrient]. 1974Nature 8 Feb. 392/1 Since 1957, selenium has been recognized as an essential micronutrient for animals. |