摘要
经调查，在江苏省连云港、浙江省象山港的中、后期条斑紫菜患有硅藻附着症。硅藻的种类以短纹楔形藻Licmophoraabbreviata为绝对优势种。由于硅藻的附生会随着时间的推移越来越严重地影响紫菜的生长和加工的质量，因而作为硅藻附着症的防治应注意在早期抓紧加以处理。用pH为2.00－2．50的酸类，处理10－15分钟，或者pH为10．00－10．40的碳酸钠，处理10－15分钟，以及连续每天干燥4小时，或在-20℃低温条件下保存6天以上等方法，都能基本上起到清除硅藻的作用，而对条斑紫菜的生长均未产生不良影响。研究结果在条斑紫菜栽培与加工生产上有应用与推广价值。
The Porphyra yezoensis Ueda in coastal waters of Lianyungang and Xiangshangang suffered from diatom felt disease during middle and last stage of growth period was investigated. The dominate epiphytic diatom is LicmoPhora abbreViata. As diatom felt disease can seriously affect the growth and processing quality of laver, certain treatment in early period is extremely important. Treatment with acid or alkaline at differaent pH value and for different time duration shows that laver has better durability against acid and alkaline than epiphytic diatom. Organic acid (citric acid,acetic acid) or inorgannic acid (phosphoric acid, hydrochloric acid) with same pH value have similar dropping rate notwithstanding different treating time. For pH value 2.00 - 2. 50 with treating time 10 - 15 minutes,dropping rate of epiphytic diatom is about 80- 90%. Sodium carbonate with pH value 10.00 -10. 40 and treating. time for 10- 15 minutes, the dropping rate is more than 90%. After continuous drying for 4 hours per day, dropping rate can be more than 96. 25 % after 5 daysUnder low temperature condition as - 20℃ and preserving for more than 6 days, the dropping rate of epiphytic diatom is more than 99%. The above test is no harm to P. yezoensis and the result obtained is valuable to be applied and recommended in laverproduction.
出处
《上海水产大学学报》
CSCD
1996年第3期163-169,共7页
Journal of Shanghai Fisheries University
关键词
条斑紫菜
硅藻附着症
脱落率
短纹楔形藻
Porphyra yezoensis,diatom felt disease, dropping rate, Licmophora abbreviata
