UV-B辐射对孔石莼与青岛大扁藻的生长影响

通过室内添加模拟试验研究了UV B辐射增强对孔石莼(重量固定)与青岛大扁藻(密度不同)间生长关系的影响。结果表明:在单养情况下,4个UV B辐射剂量都对孔石莼的生长产生抑制作用;低剂量(U 1)的UV B辐射对青岛大扁藻的生长有促进作用,而高剂量的UV B辐射则有显著的抑制作用,且因初始接种密度不同而各异。在共培养的同时附加UV B辐射处理,随着初始接种密度的增加,青岛大扁藻对孔石莼生长的抑制作用更加明显;同时,与共养相比较,孔石莼对微藻生长的抑制作用亦趋于明显。

The Effect of Enhanced UV-B Radiation to the Growth of Ulva Pertusa Kjellman and Platymonas Helgolandica Kylin var. Tsingtaoensis

In this thesis,the responds of Ulva pertusa Kjellman and Platymonas helgolandica Kylin var.tsingtaoensis to UVB radiation were studied by Indoor Emulative Experiment.The result were showed as follows: First,four different UVB radiation doses could inhibit the growth of Ulva pertusa Kjellman,but low UVB radiation doses could stimulate the growth of Platymonas helgolandica Kylin var.tsingtaoensis and high one could inhibit the growth of it when they were cultured alone.And the result would vary from the original inoculating density.Second,with the increasing original inoculating density and higher doses of UVB radiation treatment,the growth of Ulva pertusa Kjellman was obviously inhibited by Platymonas helgolandica Kylin var.tsingtaoensis.Compared with that in mixing culture,not only Platymonas helgolandica Kylin var.tsingtaoensis was greatly effected,but also Ulva pertusa showed that the growth was inhibited more observably under UVB radiation treatment.