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氮循環
释义
氮循環
dàn xún huán
氮在自然界中的循环转化过程。是生物圈内基本的物质循环之一。如大气中的氮经微生物等作用而进入土壤,为动植物所利用,最终又在微生物的参与下返回大气中,如此反覆循环,以至无穷。大气中的氮,经过细菌的固氮作用后被植物吸收组成蛋白质,动物摄取植物,且消化成身体所需要的成分。生物体死后被分解,氮则释放回大气中,这种物质的循环称为「氮循环」。德StickstoffkreislaufBio
氮循环
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spoke about
spoke amiss
spoke amiss;
spoke aside
spoke barrel
spoke bell
spoke bolt
spoke bone
spoke-bone
spoke boss
spoke by the book
spoke by the card
spoke centre
spoke clip for wheel
spoke copying machine
spoken agreement
spoken and written corpus
spoken and written language
Spoken and written language right
spoken and written larguage
spoked
spoke daggers to
spoked disc wheel
spoked handwheel
spoke-divided flywheel
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更新时间:2025/3/19 17:43:45