| 【Objective】The study was to select sweet potato varieties with strong salt tolerance.【Method】Seedlings of seven different sweet potato varieties, Funingzi 3, Fushu 604, Guangshu 87, Jishu 26, Longshu 24, Longshu 9 and Pushu32, were exposed to 150 mmol/L NaCl under pot cultivation, to evaluate their salt tolerance. The growth increment, relative growth increment, leaf area, plant fresh weight, plant dry weight, plant death rate, salt injury rate and injury index of seedlings were analyzed and evaluated.【Result】The results showed that, with 150 mmol/L NaCl stress for 15 days, the growth, relatively growth, leaf area, plant dry weight and wet weigh of all the seven varieties decreased significantly. The death rate, the salt injury rate and the salt injury index of Jishu 26 seedlings were significantly lower than those of the other 6 varieties, while all indicators of Funingzi 3 were higher than those of the other 6 varieties. Among the seven varieties, Jishu 26 had the best salt tolerance, while Funingzi 3 had the worst.【Conclusion】In combination with various indicators, the salt tolerance of the seven varieties was showed as: Jishu 26 ﹥ Fushu 604 ﹥ Guangshu 87 ﹥ Longshu 9 ﹥ Pushu32 ﹥Longshu 24 ﹥ Funingzi 3. According to injury index and actual performance, Jishu 26, Fushu 604 and Guangshu 87 were high salt tolerant varieties, Longshu 9 and Pushu32 were moderate salt tolerant varieties, while Longshu 24 and Funingzi 3 were low salt tolerant varieties. |
