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後減少的趨勢;全氮、全鉀、全磷貯量的變化範圍分別爲142.;76-534
Econometrics and forest resource evaluation methods are adopted to decide the environmental and timber benefit functions of forest ages.
運用計量經濟分析和森林資源價值評價方法獲得案例點水源涵養林木材傚益、環境傚益關於林齡的函數。
The forest will act as a defense against desert dust.
森林能起防禦沙漠灰沙的作用。
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.
就是最佳質量的橡膠也會因老化而腐爛。