应用ICP-MS研究了(NH₄)₂SO₄ 和CO(NH₂)₂肥料中植物营养元素的含量,以期为今后的氮肥肥效试验和农业生产提供基础数据。结果表明,(NH₄)₂SO₄和CO(NH₂)₂肥料中含有多种植物必需元素,包括Mg,P,K,Ca,Mn,Ni,Cu,Zn和Mo,含量达到μg·g-1级的有Mg,P,K,Ca,Mn和Fe;含量为ng·g-1级的有Ni,Cu,Zn和Mo;除了Mo以外,(NH₄)₂SO₄中的其他元素的含量均显著高于尿素。(NH₄)₂SO₄和CO(NH₂)₂肥料中有益元素有Na,Al,Si,Co和Se,其中Al和Co的含量(NH₄)₂SO₄ 显著高于CO(NH₂)₂;Si的含量CO(NH₂)₂显著高于(NH₄)₂SO₄。尿素未检测到Se和Fe。由于上述元素对于植物的生长发育有明显影响,所以在研究不同形态肥料差异和氮肥肥效时,应当全面分析影响因素。建议在做氮肥肥效试验时选择纯度高、杂质元素含量少的单一化合物肥料。

Fertilizer contains not only one compound or one element,so it is important to determine the contents of other elements necessitous and beneficial to plant.All the other nutrient elements for plant,including necessitous elements and beneficial elements in ammonia nitrogen fertilizer ((NH₄)₂SO₄) and CO(NH₂)₂,were analyzed by method of ICP-MS.The results showed that ammonia nitrogen fertilizer ((NH₄)₂SO₄) and CO(NH₂)₂ both contain many necessitous elements,Mg,P,K,Ca,Mn,Fe,Ni,Cu,Zn and Mo,thereinto the contents of Mg,P,K,Ca,Mn and Fe were on μg·g-1 the level,and Ni,Cu,Zn and Mo were on the ng·g-1 level;compared with CO(NH₂)₂,ammonia nitrogen fertilizer ((NH₄)₂SO₄) contains more necessitous elements and beneficial elements except Mo and Si.All the above elements could influence the results of nitrogen fertilizer efficiency experiments,so pure fertilizer should be used in the future nitrogen fertilizer efficiency experiments and the comparative experiments of different form nitrogen fertilizer.