摘要
为了研究不同环境因子(光照强度、培养温度、藻体密度、盐度)对龙须菜(Gracilaria lemaneiformis)特定生长率(SGR)的影响,并为近海海域放养龙须菜进行环境修复和龙须菜的人工养殖提供理论依据,在实验室条件下,设置光强梯度为:500、1 000、1 500、2 000lx;温度梯度为:10、15、20、25℃;藻体密度梯度为:0.5、1.0、1.5、2.0g/L;盐度梯度为:20‰、25‰、30‰、35‰。结果表明,龙须菜在2 000lx光照强度条件下,特定生长率明显高于其他光照强度;20℃为龙须菜最适生长温度;密度在1.5g/L时生长最快;盐度为30‰时特定生长率达到最大。因此,2 000lx、20℃、1.5g/L、30‰是本实验龙须菜的最适生长环境。
In order to study on the specific growth rate （SGR） of Gracilaria lemaneiformis under different environmental factors （light intensity, temperature, salinity, density） , moreover provide the corresponding theory basis for offshore environmental restoration by Gracilaria lemaneiformis and artificial cultivation. The experiment was conducted in the laboratory conditions, setting four light gradient： 500, 1 000, 1 500, 2 000 lx, four temperature gradient： 10, 15, 20, 25 ℃, four algal density gradient.0.5, 1.0, 1.5, 2.0 g/L, four salinity gradient： 20‰, 25‰, 30‰, 35‰. The results show that, Gracilaria lemaneiformis in 2 000 lx light intensity conditions, specific growth rate was significantly higher than other light intensity, 20 ℃ is the optimum temperature for growth of Gracilaria lemaneiformis, the density of the fastest growth is in the 1.5 g/L, the salinity is 30‰ when specific growth rate reached the maximum. Therefore, 2 000 lx, 20 ℃, 1.5 g/L, 30‰ is the most suitable growth environment of Gracilaria lemaneiformis under the experimental conditions.
基金
河北省省级预算项目2012055552
