为研究药食两用植物马齿苋种子对盐碱地的耐受能力，利用不同浓度海水处理两种生态型马齿苋种子，分析海水胁迫对其种子萌发和根芽生长的影响。结果表明，10%浓度以下的海水对苋菜种子的发芽率、发芽势、发芽指数、根长和芽长与对照相比差异不明显，略有促进作用；10%以上的海水对两种生态型马齿苋种子的萌发具有明显的抑制作用，50%高浓度海水处理，两种生态型马齿苋几乎没有萌发。各浓度海水处理下，大花马齿苋各指标均比野生型马齿苋高，抗海水胁迫能力较强。

To study 2 ecotypes of Portulaca oleracea seeds’‘( Dahua’and weed) tolerance to saline and alkaline land, effect of different seawater concentrations on the germination of 2 ecotypes of P. oleracea seeds and their root and shoot length were studied. The results showed that: at the low seawater concentration (0-10%) the seed germination of 2 ecotypes of P. oleracea had no obvious difference. The concentration of above 10% significantly inhibited the seeds germination. When the concentration reached 50%, the seed germination of 2 ecotypes of P. oleracea was seriously inhibited. At per concentration of seawater, the germination rate, vigor index, germination index and root and shoot length of‘Dahua’P. oleracea were all higher than that of weed P. oleracea, indicating higher tolerance of seawater stress.