近年来,稀土在牡丹江国营农场管理局(下称牡丹江管局)的小麦、大豆、玉米、甜菜等作物上已大面积推广应用并取得较好的增产效益。但由于该区地域辽阔,土类多,生态条件变化复杂,土壤稀土含量丰缺不一,农用效应各有差异。为了进一步查明该 In recent years, rare earths have been popularized and applied to crops such as wheat, soybean, corn, beet and so on in Mudanjiang State Farm Management Bureau (hereinafter Mudanjiang Administrative Bureau) and obtained better yield-increasing benefits. However, due to the vast territory, many soil types and complicated ecological conditions, the rare earth elements in the soil vary greatly in abundance and have different agricultural effects. In order to further identify the