CAJ | 학술논문

通过室内人工模拟降雨实验,在稳定雨强条件下,分别观察了LaCl3、La2O3和P随地表径流流失的特征,对比了稀土氧化物和稀土氯化物与土施畜禽肥料P随暴雨径流流失的相关性.结果表明,径流量和沉积物量在产流开始后的短时间内迅速增加,径流中总La和总P均有共同迁移的特征,对于添加不同剂量LaCl3和La2O3的土槽,La和P随地表径流的流失量之间都呈现显著或极显著的相关,稀土元素La的氧化物和氯化物都能较好地示踪总磷随暴雨径流流失的过程.
통과실내인공모의강우실험,재은정우강조건하,분별관찰료LaCl3、La2O3화P수지표경류류실적특정,대비료희토양화물화희토록화물여토시축금비료P수폭우경류류실적상관성.결과표명,경류량화침적물량재산류개시후적단시간내신속증가,경류중총La화총P균유공동천이적특정,대우첨가불동제량LaCl3화La2O3적토조,La화P수지표경류적류실량지간도정현현저혹겁현저적상관,희토원소La적양화물화록화물도능교호지시종총린수폭우경류류실적과정.
Non-point source pollution is one of the main sources of water pollution.Increasing inputs of phosphorus to agricultural land have led to accelerated freshwater eutrophication.There is a hypothesis that transport of exogenous rare earths can be related to phosphorus in soils.An investigation of the behavior of rare earths can be helpful for a better understanding of the transport mechanisms of phosphorus in soils.In this study,exogenous lanthaunm oxide(La2O3)and lanthanum chloride(LaCl3)were added together with phosphorous fertilizers to soils for an artificial rainfall experiment.The transport characteristics of P and La from surface runoff were investigated,and the feasibility of using rare earth elements as tracers for phosphorus in soils was discussed.The results showed that beth La oxide and chloride shared similar transport characteristics with P and there were significant correlations between them.This study demonstrated that both LaCl3 and La2O3 could be used to trace phosphorus loss in soils.