中文摘要：

以大豆东农42和东农47为试验材料,采用盆栽方式,利用茚三酮显色,甲苯萃取分光光度法测定,研究在苗期、开花期分别喷施不同浓度稀土元素La（Ⅲ）和Ce（Ⅲ）对大豆叶片脯氨酸含量的影响。结果表明：La（Ⅲ）和Ce（Ⅲ）在一定浓度下均能促进大豆叶片脯氨酸的合成,且La（Ⅲ）的促进作用好于Ce（Ⅲ）,开花期处理好于苗期;对于大豆东农42和东农47,开花期的120 mg·L-1La Cl3处理,脯氨酸含量均达到最大值分别为13.33和13.84μg·g-1,二者增幅分别为10.20%和13.63%,与对照之间均呈显著性差异。

英文摘要：

The soybeans Dongnong 42 and 47 were used as experiment materials with planting in the pot. The effect of La3 ＋and Ce3 ＋among different concentrations on proline content in the seedling stage,flowering stage was studied with ninhydrin color,toluene extraction spectrophotometry. The results showed,La3 ＋and Ce3 ＋at certain concentrations could promote the synthesis of proline of two kinds of soybeans,and La（ Ⅲ） role in promoting better than Ce（ Ⅲ）,spraying in the flowering stage better than seedling stage： for soybean Dongnong 42 and 47,under120 mg·L- 1La Cl3 treatment in the flowering stage,maximum proline content of two kinds of soybeans was 13. 33 and 13. 84 μg·g- 1,both increased 10. 20% and 13. 63%,and showed significant differences comparing CK.