摘要
Five different doses of ultraviolet-B(UV-B)radiation were supplied to tomato(Lycopersicon esculeutum.Mill)with the doubled CO_(2)concentration(700μmol·mol^(-1))in the winter plastic greenhouse.The influences on the seedling growth,fruit quality and yield of tomato were investigated.Results showed that the seedling growth,and the contents of UV absorbing compounds,soluble sugar,organic acid,vitamin C and lycopene of tomato fruits,and yield of tomato increased under doubled CO_(2)concentration.Under the doubled CO_(2)concentration the effects of lost doses of UV-B radiation could further promote the effects of doubled CO_(2)concentration.However,there is no significant increase in yield of tomato.The best dose of UV-B radiation is about 1.163 kJ·m^(-2).When the dose of UV-B radiation is more than it,the effects of UV-B will be reduced.
基金
This work was supported by both the National Nature Science Foundation of China(Grant No.30370269)
the science and technology industrialization project of Shaanxi(No.01ZC07).
