沈庆荣

摘 要：以甜瓜种子作为试验材料，研究在不同浓度NaCl溶液（0mmol/L、50mmol/L、100mmol/L、150mmol/L、200mmol/L、250mmol/L）胁迫下甜瓜种子的发芽势、相对发芽率、相对萌发活力指数、萌发幼苗的叶绿素含量及根系活力等相关指标的影响。试验结果表明：甜瓜种子在NaCl 溶液浓度≤50mmol/L时，发芽势、相对萌发活力指数、叶绿素含量等各指标与对照相比较差异不显著；随着浓度升高，发芽势、相对萌发活力、叶绿素等指标迅速降低。当NaCl溶液浓度达到200mmol/L时，发芽势等均降为0。由此可见，甜瓜对较低浓度NaCl胁迫有一定耐受性，而高浓度的NaCl胁迫对其有较强的抑制作用，且随着NaCl胁迫的增强，抑制作用增强。

关键词：NaCl胁迫；甜瓜；发芽特性

中图分类号 S652 文献标识码 A 文章编号 1007-7731（2016）06-19-04

Effect of NaCl Stress on the Germination Characteristics of Muskmelon

Shen Qingrong

（Agro-Tech Extension Center of Fengyang County，Fengyang 233100，China）

Abstract：With muskmelon seeds as the test materials，their germination energy and relative germination rate，relative germination vigor index and germination of the seedlings chlorophyll content and root activity and other related indicators were studied in different concentration of NaCl solution（0mmol/L，50mmol/L，100mmol/L，150mmol/L，200mmol/L，250mmol/L）stress. Experimental results showed that when the index of Muskmelon seeds in NaCl concentration was less than or equal to 50mmol/L，the difference between the germination potential，germination，chlorophyll content of disposing and contrast was not significant. With the increase of concentration，the germination potential，relative germination vigor，chlorophyll and other indicators decreased rapidly. When the concentration of NaCl reached 200mmol/l，germination potential and others were equal to zero. Therefore，muskmelon had some tolerance on lower NaCl stress，and higher NaCl stress had stronger inhibition on it，and with the enhancement of NaCl stress，the effect was enhanced.

Key words：NaCl stress；Muskmelon；Germination characteristics

我国盐渍化的土壤面积约有0.27亿hm2，土壤盐渍化是目前世界农业所面临的重要问题之一。近年来，随着农用温室、大棚生产蔬菜的不断发展，设施内土壤盐渍化及次生盐渍化的程度逐步加重，致使瓜果、蔬菜产量及品质逐年下降，这已成为设施瓜果、蔬菜栽培中普遍存在的难题[1]。早在1983年我国张振武就报道了关于沈阳郊区保护地土壤的盐渍化问题，随后又有大量的学者研究关于盐胁迫对蔬菜的影响[2-3]，均认为土壤盐渍化是设施瓜果、蔬菜生产的重要限制因子，而且严重影响了蔬菜的产量和品质。

甜瓜（Cucumis melo L.）属于葫芦科蔓性植物，是世界10大水果之一，为夏季消暑珍品，深受人们喜爱[4]。近年来，随着生活水平的不断提高和对健康食品关注的增强，人们对食品消费方式和消费结构日趋多元化，促使瓜果、甜瓜的消费量越来越大，种植面积也随之逐年增加。……