中文摘要：

以兰州地区常见的两个番茄品种同辉（早熟型）和霞光（晚熟型）为实验材料，模拟当地12％和20％臭氧层减薄时增强的UV-B辐射量2．54KJ·m^-2·d^-1，和4．25KJ·m^-2·d^-1．初步探讨了增强UV-B辐射对大田条件下两种番茄果实产量和品质的影响．结果表明：同辉番茄的产量随辐射增加而明显增加，霞光番茄产量只在低辐射下增加；两种辐射造成同辉果实番茄红素下降。Vc无明显变化；霞光番茄红素在低辐射下增加，高辐射时下降，Vc含量变化相反，比较两种番茄对增强UV-B辐射的响应．就果实产量而言，早熟的同辉品种更具抗性，而晚熟的霞光品种更敏感．

英文摘要：

This paper studied the effects of ebhanced UV-B radiation on fruit yield and cultivars, Tonghui（TH） and Xiaguang（XG）, which differ in ripen date. When exposed to ambient quality of two tomato （as a control）, ambient plus 2.54 KJ m^-2 d^-1 （T1） and 4.25 KJ m^-2 d^-1 （T2） of ultraviolet-B radiation （respective simulating a 12% and 20% ozone depletion of Lanzhou at summer solstice, 36° N, 103° markedly in Tonghui eultivar by two doses of UV-B radiation E） under field condition, the yield was increased while the yield was increased in Xiaguang cultivar under T1 treatment. Contents of lycopene declined and Vc did not changed in TH cuhivar under two UV-B treatments. In XG cultivar, lycopene concentration increased by low UV-B radiation and decreased by high UV-B treamentment. Meanwhile, changes of Vc contents were opposite to the lycopene. In term of fruit yield, it is likely that TH cultivar is tolerant and XG cultivar is more sensitive to supplemental UV-B radiation comparing to the different response to enhanced UV-B irradiation between two tomato cultivars.