文章摘要
戴晓玲,李文红,章增林,庞洋洋,黄柳琪.芋根江蓠和异枝江蓠早期腐解过程及其氮磷释放规律的研究[J].上海海洋大学学报,2016,25(4):582-590.
DAI Xiaoling,LI Wenhong,ZHANG Zenglin,PANG Yangyang,HUANG Liuqi.The early decomposition process and the law of nutrient release of Gracilaria blodgettii and Gracilaria bailinae[J].Journal of Shanghai Ocean University,2016,25(4):582-590.
芋根江蓠和异枝江蓠早期腐解过程及其氮磷释放规律的研究
The early decomposition process and the law of nutrient release of Gracilaria blodgettii and Gracilaria bailinae
投稿时间:2015-09-15  修订日期:2015-11-23
DOI:10.12024/jsou.20150901556
中文关键词: 芋根江蓠  异枝江蓠  腐解过程  腐解因素  抗氧化能力  氮磷释放  水质
英文关键词: Gracilaria blodgettii  Gracilaria bailinae  decay process  decay factors  antioxidant capacity  nitrogen and phosphrous release  water quality
基金项目:广西自然科学基金(2013GXNSFDA019012)
作者单位E-mail
戴晓玲 广西大学 动物科学技术学院, 广西 南宁 530005  
李文红 广西大学 动物科学技术学院, 广西 南宁 530005 whli66@163.com 
章增林 广西大学 动物科学技术学院, 广西 南宁 530005  
庞洋洋 广西大学 动物科学技术学院, 广西 南宁 530005  
黄柳琪 广西大学 动物科学技术学院, 广西 南宁 530005  
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中文摘要:
      对芋根江蓠(Gracilaria blodgettii)和异枝江蓠(Gracilaria bailinae)进行了为期12 d的腐解过程比较研究。结果表明:(1)实验结束时,芋根江蓠、异枝江蓠腐解的时间分别为10 d、8 d,藻体失重率分别为22.52%、8.50%, 2种江蓠均处于腐解早期阶段,腐解过程分先快后慢两个阶段,芋根江蓠腐解速率大于异枝江蓠。在腐解过程中芋根江蓠藻体丙二醛(MDA)含量大于异枝江蓠,但超氧化物歧化酶(SOD)活性小于异枝江蓠,说明芋根江蓠膜系统受损程度较大,对逆境胁迫的抗氧化能力较弱。(2)腐解过程中,营养盐释放规律为:TN>TP,氮磷释放不同步,磷释放滞后;其中TN释放量为:芋根江蓠>异枝江蓠;TP释放量为:芋根江蓠<异枝江蓠。腐解水体中TN、TP含量为:芋根江蓠>异枝江蓠。(3)芋根江蓠藻体含水率、C/N初始值高于异枝江蓠,前者分别为95%、52.11,后者为91%、24.01。综上所述,芋根江蓠腐解的时间较长,藻体失重率和分解速率较大,抗氧化能力较弱,TN释放量较多,所以芋根江蓠腐解的程度比异枝江蓠大; 2种江蓠氮磷含量、抗氧化能力、藻体含水率和C/N不同可能是导致藻体腐解、氮磷释放差异的原因。
英文摘要:
      A 12-day experiment was conducted to compare the differences of Gracilaria blodgettii and Gracilaria bailinae from decay process.Results showed:(1) At end of experiment, G. blodgettii body weight lost 22.52% at 10 days while G.bailinae lost 8.5% at 8 days,stating they were at early decomposition process.The decomposition process presented two obvious phases,the decomposition rate of G. blodgettii was greater than G.bailinae.Furthermore, the physiological responses of algae were changing,G.blodgettii malonaldehyde (MDA) content showed higher than G.bailinae, but in contrast of the activity of superoxide dismutase (SOD),indicating that the memberane system of G.blodgettii suffered serious damage,and weakened in antioxidant capacity.(2) The percentage of nitrogen decomposed was higher than that of phosphrous,and the release of phosphorus lagged behind nitrogen.Besides, the order of nitrogen amount realeased from the algae was G.blodgettii and G.bailinae,the order of total phosphorus amount released was G.bailinae and G.blodgettii. But G.blodgettii total nitrogen and total phosphorus in the water was greater than that of G.bailinae.(3) G.blodgettii moisture content and C/N initial value was 95% and 52.11, G.bailinae moisture content and C/N initial value was 91% and 24.01,after which the values fell.In conclusion, G.blodgettii had a longer decay time, the higher algae body weightlessness rate and decomposition rate,besides, G.blodgettii antioxidant ability was weak,but total nitrogen released more. So G.blodgettii suffered more serious decomposition than G.bailinae. Therefore, we inferred that algae nitrogen and phosphrous concentration, the ability of antioxidant,algae moisture content and C/N ratio may be the factor which caused two gracilaria genera algae differences in early decomposition and nutrient releasing.
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