| 草鱼不同养殖模式底泥间隙水与上覆水营养盐的分布特征 |
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| 引用本文： | 郭永坚,王芳,刘红彩,张振东,董双林,高勤峰,张美昭.草鱼不同养殖模式底泥间隙水与上覆水营养盐的分布特征[J].中国海洋大学学报(自然科学版),2012(Z2):82-89. |
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| 作者姓名： | 郭永坚 王芳 刘红彩 张振东 董双林 高勤峰 张美昭 |
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| 作者单位： | 中国海洋大学海水养殖教育部重点实验室;山东省淡水水产研究所 |
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| 基金项目： | 国家重点基础研究发展规划项目(2009CB118706)资助 |
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| 摘 要： | 于2009年6～10月采集草鱼(Ctenopharyngodon idellus)不同养殖模式围隔底泥的样品,对上覆水和间隙水中营养盐形态与含量进行分析,探讨间隙水和上覆水中营养盐浓度间的相关关系。结果表明:草鱼不同养殖模式围隔大部分间隙水中营养盐浓度要高于上覆水,上覆水与间隙水中PO43--P浓度呈极显著的正相关性(P<0.01)。上覆水和间隙水中的NO2--N和NO3--N浓度垂直分布特征随月变化规律较一致。养殖期间,间隙水溶解态无机氮(DIN)中NH4+-N比例最高,占95%以上。间隙水中NH4+-N浓度随深度增加而逐渐升高(0～10cm),而NO2--N和NO3--N浓度则随深度增加而减小(0～4cm)。表层底泥在0→1cm方向PO43--P浓度明显增加,从2～3cm层后多数养殖模式下浓度缓慢下降,而4→10cm方向上浓度会随深度增加而明显下降。总体而言,三元混养组中(GSL2)上覆水中营养盐的浓度一般要低于GSL1组和GSL3组,且养殖期间该组底层水DO浓度要高于GSL1组和GSL3组,初步认为是一种较为优化的草鱼混养模式。
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| 关 键 词： | 草鱼养殖 间隙水 上覆水 NH4+-N NO2--N NO3--N PO34--P |
Study on Nutrients in Sediment Interstitial Water and Overlying Water in Different Grass Carp Polyculture Enclosures |
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| GUO Yong-Jian,WANG Fang,LIU Hong-Cai,ZHANG Zhen-Dong,DONG Shuang-Lin,GAO Qin-Feng,ZHANG Mei-Zhao.Study on Nutrients in Sediment Interstitial Water and Overlying Water in Different Grass Carp Polyculture Enclosures[J].Periodical of Ocean University of China,2012(Z2):82-89. |
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| Authors: | GUO Yong-Jian WANG Fang LIU Hong-Cai ZHANG Zhen-Dong DONG Shuang-Lin GAO Qin-Feng ZHANG Mei-Zhao |
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| Institution: | 1(1.The Key Laboratory of Mariculture,Ministry of Education,Ocean University of China,Qingdao 266003,China;2.The Fresh Water Fishery Research Institute of Shandong Province,Jinan 250117,China) |
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| Abstract: | Sediment samples were collected from grass carp(Ctenopharyngodon idellus) experimental enclosures with different cultural models from June to October in 2009.The temporal-spatial distribution characteristics and correlations of nutrients in the interstitial water and overlying water have been analyzed.The results showed that the concentrations of nutrients in the interstitial water were higher than that in the overlying water,and for the PO3-4 extremely significant correlations were found between interstitial water and overlying water.For the NO-2-N and NO-3-N,their distribution trends and changes during farming time were very similar.The concentration of NH+4-N were much higher than other DIN(>95%) in the sediment interstitial water.In the vertical scale,the concentration of NH+4-N increased gradually with depths(0~10 cm),while the concentration of NO-2-N and NO-3-N decreased with depths(0~4 cm).In the interstitial water,the concentration of PO3-4 increased significantly in the first layer(0~1 cm),while declined slowly after the third layer(2~3 cm),and decreased quickly with depths in the sediments(4~10 cm).Overall,the polyculture group(GSL2) is an advisable farming model,for its lower nutrients concentration and higher dissolved oxygen concentration in bottom water than the other polyculture group(GSL1 & GSL3). |
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| Keywords: | grass carp polyculture system interstitial water overlying water NH+4-N NO-2-N NO-3-N PO3-4-P |
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