These are most plentiful in the plant's secondary root system, its tubers.
这些都是最丰富的植物的根系中学，其块茎。
The results show that there are difference among different cultivation way in root system biomass, root system volume and the number of secondary root.
结果表明，根系生物量、根系体积、侧根数在不同耕作方式间差异明显，在土壤中表现为从表层到深层逐渐递减。
According to the function, the wheat roots could be divided into 3 groups: primary root group, lower secondary root group and upper secondary root group.
依照各单位根的功能，小麦根可分为3组：初生根组、次生根下位组和次生根上位组。
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