forest age

同根派生

The biological decomposition coefficient (BDC) of N, P, and K in dead roots and fallen needles appeared the increasing trends with forest age, and was 0.7-1.5, 1.1-1.7, 1.0-3.5, and 0.9-1.3,1.1-1.7,1.0-1.3, respectively.
a-~1。凋落物層中的N、P、K貯量隨林齡增大呈先增加后減少的趨勢;全氮、全鉀、全磷貯量的變化范圍分別為142.;76-534
Econometrics and forest resource evaluation methods are adopted to decide the environmental and timber benefit functions of forest ages.
運(yùn)用計(jì)量經(jīng)濟(jì)分析和森林資源價(jià)值評價(jià)方法獲得案例點(diǎn)水源涵養(yǎng)林木材效益、環(huán)境效益關(guān)于林齡的函數(shù)。
The forest will act as a defense against desert dust.
森林能起防御沙漠灰沙的作用。
He prefers to assort with people of his own age.
他更喜歡與自己的同齡人交往。
Even the best quality rubber will perish with age.
就是最佳質(zhì)量的橡膠也會因老化而腐爛。