CO_2浓度倍增和UV-B辐射增强对冬季大棚番茄生长、果实品质和产量的影响

The Combined Effects of Enhanced UV-B Radiation and Doubled CO_2 Concentration on the Growth,Fruit Quality and Yield of Tomato in Winter Plastic Greenhouse

在CO2浓度倍增(700μmol.mol-1)条件下,对补充5个不同低剂量的UV-B辐射对大棚番茄幼苗的株高、茎粗、干重、鲜重,果实的紫外吸收物、可溶性糖、有机酸、Vc、番茄红素等含量,以及果实产量的影响进行了研究。结果表明,CO2倍增能够明显促进番茄幼苗的生长,提高了番茄果实的紫外吸收物、可溶性糖、有机酸、Vc、番茄红素等含量以及果实的产量。在CO2倍增条件下,补充低剂量UV-B辐射可以进一步促进番茄幼苗的生长,提高番茄果实的紫外吸收物、可溶性糖、有机酸、Vc、番茄红素等含量,说明在CO2倍增的条件下低剂量UV-B辐射对番茄的生长有促进效应,但对果实的产量影响不大。当UV-B的辐射剂量为1.163 kJ.m-2时,这种促进效应最明显,超过这一剂量时,UV-B辐射对番茄的促进效应开始减弱。

Five different doses of UV-B radiation was supplied to tomato （Lycopersicon esculeutum Mill） with the doubled CO2 concentration （700 μmol ·mol^-1 ）in winter plastic greenhouse. The influences on the seedling growth, fruit quality and yield of tomato were investigated. The results showed that the seedling growth, and the contents of UV absorbing compounds, soluble sugar, origanic acid, Vc, lycopene of tomato fruits, and yield of tomato increased under doubled CO2 concentration. Under the doubled CO2 concentration the effects of lose doses of UV-B radiation could promote the effects of doubled CO2 concentration furtherly. But there is not significant difference on yield of tomato. The dose of UV-B radiation about 1. 163 kJ·m^-2 is the best dose . When the dose of UV-B radiation is more than it ,the effects of UV-B will be reduced.