主要蔬菜作物耐盐性比较

The Comparison of Salt Tolerance in Major Vegetable Crops

选用十字花科、葫芦科、茄科、豆科、伞形科及百合科等27种蔬菜作物,研究了不同浓度NaCl溶液对蔬菜种子萌发的影响,初步确定出27种蔬菜作物的耐盐适宜值,耐盐临界值以及耐盐致死值。结果表明:不同蔬菜作物对NaCl胁迫的响应不同,随着NaCl浓度升高,蔬菜作物种子的发芽率逐渐降低,十字花科部分蔬菜作物种子能够适应一定的低盐胁迫,表现为低浓度NaCl促进种子萌发。各蔬菜作物种子的相对发芽率与盐浓度之间存在显著的负相关。根据蔬菜作物种子耐盐临界值的大小,比较得出耐盐性较强的为百合科、十字花科,较弱的为茄科,葫芦科、伞形科、豆科的耐盐性居中。

In this study,the seeds of 27 types of vegetable crops,Cruciferae,Cucurbitaceae,Solanaceae,Legu-minosae,Umbelliferae and Liliaceae were treated with NaCl solution of different concentrations .We preliminarily got the suitable concentration ,the critical concentration and the lethal concentration .The result showed that the reaction of different vegetable crops was different under salt stress .With increasing of NaCl concentration ,the seed germina-tion rate gradually deceased .Part of the Cruciferae vegetable crop seeds can adapt to a low salt stress and the low salt stress had promotion effect on seeds germination .The relative germination rate of vegetable crops existed nega-tive correlation with salt concentration .According to the critical concentration ,Liliaceae,Cruciferae were the most tolerant ,Solanaceae was the least tolerant , Cucurbitaceae , Umbelliferae , Leguminosae were the medium tolerant to NaCl stress.