温度和光照强度对刺松藻生长效果影响研究

为探明刺松藻海区养殖期间生长与光照强度、温度之间的关系,开展了刺松藻海区养殖效果研究。结果表明,刺松藻能在较宽的温度范围内生存和生长,水温在25℃以下时,生长速度随温度的升高而加快;水温在25-30℃之间时刺松藻仍能生长,但生长速度随温度的升高而减慢,水温30℃以上时藻体顶端开始变白,停止生长。同时刺松藻不同生长阶段对光照强度要求有明显的差异,养殖前期(第1d到40d左右),在水深0.5m处的生长速度最快(0.067±0.008 cm.d-1);养殖中期(第60d到90d),在水深1.5m处生长速度最快(0.144±0.010 cm.d-1);整个养殖过程中,以1.0m的水深处平均生长速度最快(0.256±0.027 cm.d-1)、产量最高。

A study of both temperature and underwater illuminance effect on the growth of green alga, Codium fragile (Suringar) Hariot

Experiments on growth of Codium fragile were conducted to reveal the relationship among growth,temperature and illumination intensity.The result showed that Codium thalli were capable of survival and growth in a wide temperature range.Growth rate increased as temperature increased up to 25°C,while reduced at temperature of 25-30°C.The need of light intensity for C.fragile has obvious difference in different development stages.During the previous stage of cultivation（Stage I）,the greatest growth rate occurred at 0.5 m depth（0.067±0.008 cm·d-1）,during the middle stage of cultivation（Stage II）,the greatest growth rate occurred at a depth of 1.5 m（0.144±0.010 cm·d-1）.For the whole stage of the cultivation,yield and average growth rate achieved the greatest at 1 m depth（0.256±0.027 cm·d-1）.