中文摘要：

从农业经济效应和环境生态效应二方面,论述了稀土肥料促进作物生长、发育,提高作物产量,改善作物品质的效应与机理;影响土壤区系中微生物种群数量和土壤脱氢酶、碱性磷酸酶、脲酶及蔗糖酶的功能,继而反馈调节作物生长;缓解酸雨、紫外辐射和重金属伤害作物的生态生理学效应;并以稀土在作物体内分布与富集规律为参考,探讨了稀土农用的安全性。实践证明,稀土农用只要严格控制剂量就能实现增强作物抗逆性和提高作物经济效益的目标。

英文摘要：

From the aspects of agricultural economic and environmental ecological effects, were the effects and mechanism of rare - earth micro- fertilizer to improve the growth, development, quality and yield of the crops; the adjustment of crops growth by influencing the number of microbial population in soil district and the function of the soil dehydrase, alkaline phosphatase, urease and sucrase; the ecophysiological effects of alleviating the injure of acid rain, ultraviolet radiation, heavy metal on crops were il- lustrated; The sureness of REE＇s use in agricultural was provided, according to the rule of the distribution and enrichment of RE in crops. It had been proved that the goal to enhance crops resistance and increase the economic efficiency could be realized as long as the dosage of RE be strictly controled.