日间补照UV-B辐射对温室黄瓜穴盘幼苗生长发育的影响

Effects of Day-time Supplements of UV-B Radiation on Greenhouse Cucumber Plug Seedling Growth

[目的]研究日间UV-B辐射对黄瓜穴盘苗生长发育的影响,寻求最佳的照射时长,以达到培育壮苗的目的。[方法]以黄瓜品种"露地二号"为试验材料,通过不同时长UV-B照射试验。[结果]结果表明,照射2 h没有作用;照射3 h即可有效抑制黄瓜幼苗徒长,叶绿素含量提高;照射4 h虽然有抑制幼苗徒长的作用,但苗期全株干鲜重、定植30 d后的株高、茎粗和果实产量均低于3 h。[结论]日间补充照射UV-B辐射的最佳时长为3 h。

[Objective] This paper studied the effects of （lay-time supplements of UV-B radiation on seedling growth of cucumber,seek the best radiation time,In order to achieve the aim of culturing robust seedling [Method] By using cucumber wlrietv ＂Land 2 cucumber＂ as the testing material and based on different the UV-B radiation time test. [Result] The results showed that there was no effect of radiation 2 h, on the eontrao,, radiation of 3h could effectively inhibit the leggy seedlings of cucumber and ehl（~rophyll eonten｜ was the highest. Ahhough radiation 4 h couht inhibit the action of leggy seedlings, fresh weight and dry. weight of seedling, plant colonization after 30 d height, stem （tiameter and the results period yield of radiation 4 h were lower than that of radiation 3 h. [Conclusion] Day-time supplements of UV-B radiation 3 h is the best.