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冬季蓝色无滴膜塑料大棚内有效光合辐射 ( PAR)和紫外 B( UV- B)都比棚外低。给大棚番茄补充照射 UV- B和红光。结果表明 ,红光可提高番茄果实糖、酸含量。高剂量 UV- B( 0 .95k J· m- 2· d- 1,0 .71 k J· m- 2· d- 1)降低番茄红素和维生素 C( Vc)的含量 ,低剂量UV- B( 0 .54k J· m- 2 · d- 1,0 .65k J· m- 2 · d- 1)可提高番茄红素和 Vc含量。低剂量 UV- B( 0 .54k J·m- 2 · d- 1)与红光复合处理可提高果实中糖、酸、番茄红素含量。还发现在植物不同发育阶段处理 ,植物对 UV- B的反应不同。由此认为 ,在 9～ 1 0叶期开始用 0 .54k J·m- 2·d- 1UV- B和红光复合处理能显著提高番茄果实品质。
Winter blue drip film plastic greenhouse effective photosynthetic radiation (PAR) and ultraviolet B (UV-B) are lower than the shed outside. Add UV-B and red light to greenhouse tomatoes. The results showed that red light could increase the fruit sugar and acid content. High-dose UV-B (0.95k J · m-2 · d-1, 0.71k J · m-2 · d-1) decreased the content of lycopene and vitamin C (Vc) B (0.54k J · m-2 · d-1,0 .65k J · m-2 · d-1) increased lycopene and Vc content. Low-dose UV-B (0. 54k J · m-2 · d-1) combined with red light could improve the content of sugar, acid and lycopene in fruit. It has also been found that plants respond differently to UV-B at different developmental stages of the plant. Therefore, the combination of 0. 54k J · m-2 · d-1UV-B with red light at 9 ~ 10 leaf stage could significantly improve the fruit quality of tomato.