不同世代大石花菜切段育苗的生态试验

A ecological study on the raising of seedlings of different generations fragments of Gelidium pacificum Okam

以大石花菜Gelidium pacificum Okam.的雌配子体、雄配子体和孢子体的切段为材料,进行切段的再生、附着与直立苗培育的辐照度-温度双因子试验及pH和盐度的试验。观测切段培育的死亡率、再生率、附着率、切段平均再生芽数和再生芽长度的变化,还观察了切段培育出直立苗及其生长的情况。结果表明:雌、雄配子体和孢子体在不同辐照度-温度组合以及不同盐度、pH条件下,切段的培育情况没有显著差异。说明三者的生态适应性基本一致。适宜的培育条件是温度17.5～22.5℃,辐照度20～60μEm^(-2)·S^(-1),盐度15～35,pH8.0～8.5。

The fragments of female gametophyte, male gametophyte and sporophyte of Gelidium pacificum Okam. are used in the study on the regenerating, sowing and raising erect seedlings under various environmental conditions, which consists of different irradiance- temperature, pH and salinity. These three generations present the similiar effects. The optium conditions are 17.5-22.5 of temperature, 15-35 of salinity, 20-60μEm-2s-1 of irradiance, 8.0-8.5 of pH.