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| 不同氮、磷浓度及配比对铜藻(Sargassum horneri)幼苗生长的影响 |
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李慧1, 丁刚2, 辛美丽2, 刘玮2, 马增岭1, 李大鹏2, 郭文2
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1.温州大学生命与环境科学学院 温州 325035;2.山东省海洋生物研究院 青岛 266104
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| 摘要: |
| 采用铜藻（Sargassum horneri）幼苗为实验对象，分别以NaNO3和NaH2PO4为氮源和磷源，研究了不同氮磷质量浓度及氮磷配比对铜藻幼苗生长的影响。进行了氮、磷单因子实验、双因子实验以及不同氮磷配比实验，实验时间为8d。结果表明：氮和磷对铜藻幼苗生长影响极显著（P<0.01），且当氮、磷的质量浓度分别为8mg/L、0.4mg/L时，铜藻幼苗的特定生长率最大；交互作用影响不显著（P>0.05），不同质量浓度的氮为主效应；不同氮磷质量浓度比影响极显著（P<0.01），且当氮磷比为10：1时，铜藻幼苗的特定生长率最大。研究结果为铜藻幼苗培育过程中营养盐的合理调控提供了理论依据。 |
| 关键词: 氮磷比 特定生长率 铜藻幼苗 |
| DOI：10.11693/hyhz20161000226 |
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| 基金项目:国家海洋公益性行业科研专项资助，201505022-2号；山东省现代农业技术体系建设专项资金资助项目，SDAIT-26号。 |
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| EFFECTS OF NITROGEN AND PHOSPHORUS CONCENTRATIONS AND RATIOS ON GROWTH OF SARGASSUM HORNERI SEEDLINGS |
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LI Hui1, DING Gang2, XIN Mei-Li2, LIU Wei2, MA Zeng-Ling1, LI Da-Peng2, GUO Wen2
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1.College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China;2.Marine Biology Institute of Shandong Province, Qingdao 266104, China
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| Abstract: |
| The effects of different nitrogen (N) concentrations (0, 2, 4, 6, 8, and 10mg/L) and phosphorus (P) concentrations (0, 0.2, 0.4, 0.6, 0.8, and 1.0mg/L) and N/P ratios (5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1 and 40:1) on the growth and development of macrophyte Sargassum horneri seedlings were studied. The single factor and two-factor experiments were conducted for 8 days. The results showed that the concentrations and proportions of N and P in the medium had great significant (P<0.01) influence on the growth of the seedlings, but no interaction between N and P (P>0.05). The maximal specific growth rate of the seedlings occurred at 8mg/L N, 0.4mg/L P and 10:1 of N to P, respectively. The findings suggested that suitable nutrient concentration and ratio of N and P in the medium was needed for artificial culture of S. horneri seedlings. |
| Key words: N/P ratio specific growth rate Sargassum horneri seedling |
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