稀土元素对林木的生理效应

在适宜条件下，稀土对林木许多生理功能都有积极作用。稀土在促进林木生长发育，增强营养水平，提高抗性等方面效果显著。稀土可能主要通过调节有关酶和内源激素水平及活性而发挥作用，其作用机理还有待于进一步研究。

Physiological effects and possible mechanism of rare earth elements on forest trees

The results from the experiments of rare earth elements applied to forest trees show that in proper condition,rare earth elements treatments have position effects on physiological characteristics of forest trees.Rare earth elements can markedly increase the growth and yield of forest trees,improve the level of metabolism and the ability of resistance to improper environment of forest trees and so on.The effects of rare earth elements on forest trees may be related to the regulations of contents and activities in enzyme and endogenous hormones.More study is necessary for the physiological mechanism of rare earth elements to the forestry.