age class

同根派生

The 1st age class rhizome emerges at mid of growing season.
1齡根莖是在生長(zhǎng)季中期開(kāi)始形成的。
At this age, the biomass of the age class is maximum.
在這個(gè)年齡，年齡組的生物量是最大的。
Among them, 35~age group was the maximum of death age class, constituting 29.1% of constitution of causes of death.
死亡年齡組以35嵗的年齡段爲(wèi)最高;佔(zhàn)死因搆成的29.;1%25。
The dry matter storage and water soluble sugar content in older age class rhizomes increased with year.
高齡級(jí)根莖的乾物質(zhì)貯量和水溶糖含量有一個(gè)逐年累積的增加過(guò)程。
The dry matter storage and water soluble sugar content in P. communis rhizomes increased in quadratic with increasing age class.
隨著齡級(jí)的增加，蘆葦種群根莖的乾物質(zhì)貯量和水溶糖含量均呈二次曲線(xiàn)變化。