钾是植物生长必需的三大要素之一。为了确定KCL肥料中钾以外的其他植物营养元素,应用ICP-MS研究了钾肥KCL中植物营养元素的含量,以期为今后的钾肥肥效试验和农业生产提供基础数据。结果表明,KCl肥料中含有除K以外的多种植物必需元素Mg,Ca,Mn,Fe,Ni,Cu,Zn和Mo以及对植物有益元素Na,Al,Si,Co和Se。必需元素含量多的是Ca(1309.48μg·g-1),Fe (500.83μg·g-1),Mg(50.51μg·g-1)和Mn(5.44μg·g-1);有益元素中Na的含量达到25 095.89μg·g-1。由于上述元素对于植物的生长发育有明显影响,所以在研究钾肥的影响时,应当全面分析影响因素。建议在做肥钾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。

Potassium is one of the three most important plant nutrient elements,so many researchers pay attention on its fertilizer efficiency.But fertilizers were all industrial products containing many other nutrient elements in most experiments of fertilizer efficiency.All the other nutrient elements,including necessitous elements and beneficial elements in potassium fertilizer (KCl) were analyzed by method of ICP-MS.The results showed that KCl fertilizer contained many necessitous elements (Mg,Ca,Mn,Fe,Ni,Cu,Zn and Mo),the concentrations of them are 50.51,1 309.48,5.44,500.83 μg·g-1 and 65.54,238..85,212.44,10.40 ng·g-1 respectively;beneficial elements (Na,Al,Si,Co and Se) are 25 095.89,3.83,3.40 μg·g-1 and 13.12,23.25 ng·g-1 respectively.All the above elements could influence the results of potassium fertilizer efficiency experiments,so pure fertilizer should be used in the future potassium fertilizer efficiency experiments.