the place where something begins, where it springs into being; "the Italian beginning of the Renaissance"; "Jupiter was the origin of the radiation"; "Pittsburgh is the source of the Ohio River"; "communism''s Russian root" 同义词：beginning, origin, root, source,
a developed system of roots 同义词：root system,
fixedness by or as if by roots; "strengthened by rootage in the firm soil of faith"
例句与用法
1.
The microbial agent ' s ability in straw degradation was detected by potted experiment and scanning electron microscope . the result indicated that after 15d the structure of straw was destroyed and did not float longer , which did not affect crop ' s rootage ; furthermore the effect on the next crop ' s growth was studied , and the results shown that the microbial agent could accelerate the next crop ' s growth . the strain b3 secreted incretion iaa and aba by tlc and immunological analysis 通过盆栽试验和扫描电镜观察检测了秸秆降解剂对秸秆的降解效果，结果发现，该降解剂在15d内就能破坏秸秆的结构，使秸秆不再漂浮，不影响作物的生根；进一步检测其对后季作物生长的影响发现，该降解剂还能促进后季作物的生长，薄板层析和免疫学检测均显示菌株b3分泌了iaa和aba 。
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