| 氮磷比对两种蓝藻生长及竞争的影响 |
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| 引用本文： | 孟顺龙,裘丽萍,胡庚东,瞿建宏,范立民,宋超,陈家长,徐跑.氮磷比对两种蓝藻生长及竞争的影响[J].农业环境科学学报,2012,31(7):1438-1444. |
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| 作者姓名： | 孟顺龙 裘丽萍 胡庚东 瞿建宏 范立民 宋超 陈家长 徐跑 |
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| 作者单位： | 1. 中国水产科学研究院淡水渔业研究中心,农业部长江下游渔业资源环境科学观测实验站,中国水产科学研究院内陆渔业生态环境和资源重点开放实验室,江苏无锡214081;南京农业大学无锡渔业学院,江苏无锡214081
2. 中国水产科学研究院淡水渔业研究中心,农业部长江下游渔业资源环境科学观测实验站,中国水产科学研究院内陆渔业生态环境和资源重点开放实验室,江苏无锡214081 |
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| 基金项目： | 中央级公益性科研院所基本科研业务费专项资金项目，现代农业产业技术体系建没专项资金资助 |
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| 摘 要： | 通过室内实验研究了不同氮磷比条件下主要水华藻类——铜绿微囊藻(Microcystis aeruginisa)和巨颤藻(Oscillatoria princeps)的生长和种间竞争。结果表明,无论在纯培养体系还是混合培养体系中,微囊藻在中氮磷比(N/P=4.5)下生长最好,颤藻在低氮磷比(N/P=0.45)下生长最好;氮磷比对藻类的种间竞争抑制参数能够产生明显影响,中氮磷比时微囊藻对颤藻的竞争抑制参数最大,分别是高氮磷比(N/P=45)和低氮磷比时的1.38倍和1.35倍;而颤藻对微囊藻的竞争抑制参数则是在低氮磷比时最大,分别是高氮磷比和中氮磷比时的2.22倍和4.02倍。中、高氮磷比时微囊藻对颤藻的竞争抑制参数(α)大于颤藻对微囊藻的竞争抑制参数(β),而低氮磷比时则相反。根据Lotka-Volterra竞争模型中两物种的竞争结局可初步判断,中、高氮磷比时,微囊藻在竞争中占优势,低氮磷比时,微囊藻和颤藻不稳定共存。
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| 关 键 词： | 微囊藻 颤藻 氮磷比 种间竞争 |
Effect of Nitrogen and Phosphorus Ratios on Growth and Competition of Two Blue-green Algae |
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| MENG Shun-long
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QIU Li-ping
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HU Geng-dong
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QU Jian-hong
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FAN Li-min
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SONG Chao
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CHEN Jia-zhang
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XU Pao.Effect of Nitrogen and Phosphorus Ratios on Growth and Competition of Two Blue-green Algae[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2012,31(7):1438-1444. |
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| Authors: | MENG Shun-long QIU Li-ping HU Geng-dong QU Jian-hong FAN Li-min SONG Chao CHEN Jia-zhang XU Pao |
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| Institution: | 1,2 *(1.Freshwater Fisheries Research Center,Chinese Academy of Fishery Sciences;Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River,Ministry of Agriculture;Key Open Laboratory of Ecological Environment and Resources of Inland Fisheries;Chinese Academy of Fishery Sciences,Wuxi 214081,China;2.Wuxi Fishery College,Nanjing Agricultural University,Wuxi 214081,China) |
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| Abstract: | Microcystis aeruginosa and Oscillatoria princeps are the most common blue-green algae in eutrophication lakes with shallow water.In order to know the growth process of water bloom blue-green algae in eutrophication lakes and the relationship between algae growth and nitrogen and phosphorus ratios,the experiment was carried out to research the interspecies competition between M.aeruginosa and O.princeps at different nitrogen and phosphorus ratios through indoors experiment.The results indicated that M.aeruginosa grew best at the middle nitrogen and phosphorus ratio(N/P=4.5)and O.princeps grew best at the lower nitrogen and phosphorus ratio(N/P=0.45)both in the uni-culture system and the co-culture system.The inhibition parameter of interspecies competition could be significantly influenced by nitrogen and phosphorus ratios.The maximum inhibition parameter of M.aeruginosa against O.princeps was found at the middle nitrogen and phosphorus ratio,which was 1.38 times and 1.35 times as that at the higher(N/P=45)and the lower nitrogen and phosphorus ratios,respectively.And the maximum inhibition parameter of O.princeps against M.aeruginosa was found at the lower nitrogen and phosphorus ratio,which was 2.22 times and 4.02 times as that at the higher and the middle nitrogen and phosphorus ratios,respectively.The inhibition parameters of M.aeruginosa against O.princeps were larger than that of O.princeps against M.aeruginosa at the higher and the middle nitrogen and phosphorus ratios,but was lower at the lower nitrogen and phosphorus ratio,which meant that the inhibition effects of M.aeruginosa on O.princeps were stronger than that of O.princeps on M.aeruginosa at the higher and the middle nitrogen and phosphorus ratios,but the position was reverse at the lower nitrogen and phosphorus ratio.M.aeruginosa dominated in the co-culture system with the higher and the middle nitrogen and phos-phorus ratios,and M.aeruginosa and O.princeps could unstablely coexist in the co-culture system with the lower nitrogen and phosphorus ratio based on the competition model of Lotka-Volterra. |
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| Keywords: | Microcystis aeruginisa Oscillatoria princeps nitrogen and phosphorus ratio interspecies competition |
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