Four Helianthus tuberosus genotypes or varieties (Xuzhou No.1, Xuzhou No.2, Nanchong No.1 and Daxing No. 1) were treated by the simulative seawater with different salt concentrations .The results showed that:under salt stress, the yield of different Helianthus tuberosus genotypes all decreased with the increase of salt concentration , and the maximum decline rate in yield reached 93.9%.When 75%salt water was used for irrigation , all varieties did almost not grow , their leaves became yellow or fell off, the plants were seriously injured , and the yields were greatly affected .Through the physical and chemical analysis , it was found that the total sugar , reducing sugar and inulin contents in the tubers of Helianthus tuberosus under 25% salt stress were increased slightly, but they all decreased with the increase of salt concentration , indicating that different Helianthus tuberosus genotypes (vari-eties) had self-regulation protection mechanism and a certain adaptability to salt stress , but their self-adjustment ability declined when salt concentration increased .By comprehensive analysis of tolerance , yield and sugar content of various varieties , Xuzhou No . 2 and Xuzhou No .1 had better tolerance to salt stress .%通过对徐州1号、徐州2号、南充1号、大兴1号4个菊芋品种进行不同盐浓度模拟海水处理，结果表明：在盐胁迫下，不同基因型菊芋品种的产量均有所下降，且随着盐分浓度的增加，产量的下降幅度增加，最大下降幅度达到93．9％；当用75％盐水浇灌时，所有品种几乎都不能生长，植株叶色变黄脱落，受伤严重，产量受到很大影响。对盐胁迫后的菊芋块茎进行理化分析，菊芋块茎中总糖、还原糖、菊糖含量均在25％浓度盐分胁迫下略有增加，说明不同基因型品种对盐胁迫有自我调节保护机制，产生一定的适应能力，但是随着盐分浓度增加，各种糖分含量均下降，说明随着胁迫增加植株自我调节能力减退，从而导致各种营养成分含量下降。综合分析品种的耐受度、产量、含糖量等多种因素，以徐州2号和徐州1号对盐胁迫有较好的耐受性。
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