摘要
紫菜丝状体的生长发育不仅受光线、温度和营养等多种生态条件的影响,而且也因采果孢子时间的早、晚和投放果孢子密度大小而有较大的差别。在其他情况比较一致的条件下,光线条件对丝状体的生长和发育具有较明显的影响。我们在实验工作中从丝状体的这一特性出发,经过多年的实验研究,于1971年提出了以控光为中心的条斑紫菜丝状体的综合性培养措施,较好地解决了条斑紫菜适时、集中、大量放散壳孢子的问题。
Two experiments,one carried out in 1973,the other in 1974,with the aim of determining the effect of culture light intensity on the conchocelis phase of Porphyra yezoensis Ueda have been conducted.The conchocelis phase was cultured in ordinary culture tanks with sunlight coming from a ceiling window as source of illumination.The experiment done in 1973 consisted of 5 sets of culture,with a maxi-mun light intensity during clear sky of about 6000,3000,1500,750 and 300 luxes respectively.The experiment done in 1974 included 4 sets of culture,with a maximum light intensity during clear sky of about 6000,3000,1500 and 750 luxes.1.Carpospores were able to germinate at the different light intensities under which they were cultured.The optimum light intensity ranged from 1500-6000 luxes.Under 300 luxes the germination rate of carpospores was particularly low.2.The same was true for the algal filaments except that growth rate was retarded at a slightly lower light intensity,that is,at 750 luxes.3.Under the different light intensities swollen filaments(Spofangial branchlets)could be formed.The stronger the light intensity the earlier and much more the swollen filaments formed.The optimum light intensity also ranged from 1500-6000 luxes.4.The formation of conchospores seems not being influenced by different light intensities.All the swollen filaments formed conchospores shortly after the temperature dropped down below 22℃in spite of both the light condition to which they were subjected and the amount and age of the swollen filaments.5.In general,the growth and development of the conchocelis of Porphyra yezoensis Ueda could take place under a wide range of light intensity.A higher light intensity seems to favor the formation of swollen filaments.The observed tendencies mentioned above more or less reflect the light requirements of the conchocelis in nature.6.The results of these two experiments prompted us to take measures to regulate the light intensity.All we have to do is to set the highest light intensity of culture tanks under clear sky to about 1500 luxes.Trial experiments in a production scale done since 1975 have given excellent results.It is feasible that this new measure be adopted by production units in their conchocelis culture work.
作者
郑宝福
陈美琴
费修绠
Zheng Baofu;Chen Meiqin;Fei Xiugeng(Institute of Oceanology,Academia Sinica)
出处
《海洋与湖沼》
1980年第4期362-369,384,共9页
Oceanologia Et Limnologia Sinica
