在土培条件下，研究了不同硼效率甘蓝型油菜基因型镁的吸收、分配以及硼镁关系。结果表明，镁的吸收、分配及镁硼比值等存在基因型差异，硼对镁有一定影响。镁含量高效品种＜低效品种，镁吸收量高效品种＞ 低效品种，提高硼水平，镁含量下降，吸收量增加。在镁的分配、运转能力上，高效品种＞ 低效品种，且硼对高效品种的促进作用较大。镁硼比值为高效品种＜ 低效品种，镁硼比值 Ｂ１＞ Ｂ２＞ Ｂ３ Under soil culture conditions, the absorption and distribution of genotypes of magnesium with different boron efficiency in Brassica napus and the relationship between boron and magnesium were studied. The results showed that there were genotype differences in the absorption and distribution of magnesium and the ratio of magnesium to boron, and boron had some influence on magnesium. High magnesium content varieties inefficient varieties, improve boron levels, magnesium content decreased, increased absorption. In magnesium distribution, operational capacity, efficient varieties> inefficient varieties, and boron to promote greater efficiency varieties. The ratio of magnesium to boron was high efficient variety B2> B3