摘要
【目的】了解浒苔(Ulva prolifera)在富营养化状态下对氮磷吸收的作用以及生物量增长的规律,为浒苔绿潮的治理及利用提供参考。【方法】设置2个营养盐浓度组,采用国家标准方法检测不同时间水体中可溶性无机氮(DIN)和PO3-4-P的浓度,考察浒苔对氮磷的吸收效率;设置不同温度和营养盐浓度组合,定时测量藻体重量,并据此了解浒苔的生长特性。【结果】在本实验条件下,浒苔最高吸收了水体中62.2%的DIN和27.5%的PO3-4-P,吸收速率分别达到0.022mg N/(g·h)和0.006mg P/(g·h);浒苔在各实验组生长都较快,其中在15℃,N∶P(mg/L)=3∶0.3的条件下生长最快,日特异生长率达9.44%,8d生物量就能加倍;在20℃,不添加氮磷的情况下生长最慢,但也只需13d生物量就能翻倍。【结论】浒苔能够较好的吸收氮磷营养盐,但其生长速度也较快。
【Objective】The nutrient uptaking and growth of Ulva prolifera was measured in the laboratory,in order to provide a reference for management and utilization of Ulva prolifera.【Methods】The concentrations of DIN and PO3-4-P in water under two nutrient concentration were tested by national standard.The weight of algae under different temperature and nutrient concentration was timely measured.【Results】The results showed that the maximum percentages of DIN and PO3-4-P absorbed by U.prolifera were 62.2% and 27.5%,and the uptaking rates were 0.022 mg N/(g·h)and 0.006 mg P/(g·h).U.proliferagrew fast under various experimental conditions.The max SGR was 9.44% with the doubled weight after 8d when the temperature was 15℃ and added N∶P(mg/L)=3∶0.3.When the temperature was 20℃ without adding chemicals,the growth was the slowest and the weight doubled after13 d.【Conclution】U.prolifera showed the characteristics of high nutrients absorbance and growth rate.
出处
《广西科学院学报》
2015年第4期243-246,252,共5页
Journal of Guangxi Academy of Sciences
基金
海洋公益性行业科研专项经费项目(201305021
201405010)
青岛市市南区科技发展资金项目(2013-12-005-SW)资助
关键词
浒苔
氮磷吸收
生长特性
Ulva prolifera
nitrogen and phos phorus absorption
growth characteristics
