VERTICAL DISTRIBUTION PATTERN AND INFLUENCE FACTORS OF NITRITE IN SHENHU AREA, SOUTH CHINA SEA
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摘要:
对南海神狐海域亚硝酸盐垂直分布进行了调查研究,探讨了亚硝酸盐分布规律的影响因素,结果表明,亚硝酸盐含量在水深75~100 m处出现最大值,含量范围为0.136~0.260 μmol·L-1, 其他水层含量均<0.005 μmol·L-1。与之相关的铵盐和硝酸盐却没有相似的分布规律,铵盐含量在整个水层中没有明显的分布规律,硝酸盐的含量随水深增加而增大。鉴于此,又对和其相关的物理、化学参数做了分析,发现亚硝酸盐独特的分布规律受铵盐浓度、温度、酸度、溶解氧含量、有机物含量等多种因素影响。
Abstract:Vertical distribution pattern of nitrite and its influence factors were studied in Shenhu Area, South China Sea. The maximum of nitrite in concentration of 0.136-0.260 μmol·L-1 appears within the depth between 75 to 100 meters, and in the other ranges, the concentration is less than 0.005 μmol·L-1. However, there is no similar distribution patterns for either ammonium salt or nitrate. The distribution pattern of ammonium salt is not obvious, and nitrate increases with water depth. Further study of physical and chemical factors reveals that the distribution of nitrite is influenced by the concentration of ammonium salt, temperature, dissolved oxygen, acidity, organic content and others.
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Key words:
- nitrite /
- vertical distribution /
- Shenhu Area /
- nitrification
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表 1 南海神狐海域亚硝酸盐及相关物化参数垂直分布
Table 1. Vertical distribution pattern of nitrite and related physicochemical parameters in Shenhu Area, South China Sea
样品号 水深/m t/℃ pH DO/(mg·L-1) NH4+-N/(μmol·L-1) NO2--N/(μmol·L-1) NO3--N/(μmol·L-1) SH-CTD1-1 3 29.2 8.32 6.56 0.219 0.021 0.506 SH-CTD1-2 30 28.5 8.27 6.89 0.230 0.021 0.174 SH-CTD1-3 50 24.9 8.24 6.96 0.262 0.012 0.166 SH-CTD1-4 75 22.7 8.22 6.68 0.219 0.199 0.506 SH-CTD1-5 100 20.7 8.18 6.09 0.230 0.227 6.97 SH-CTD1-6 150 17.2 8.10 4.50 0.175 0.017 17.0 SH-CTD1-7 200 14.6 8.06 4.65 0.186 0.003 22.1 SH-CTD1-8 300 12.2 8.03 4.14 0.262 0.002 28.3 SH-CTD1-9 500 8.9 7.96 3.16 0.175 0.002 38.3 SH-CTD2-1 3 29.5 8.28 6.47 0.230 0.006 0.124 SH-CTD2-2 30 29.2 8.27 6.60 0.240 0.012 0.631 SH-CTD2-3 50 27.1 8.25 6.69 0.273 0.017 0.432 SH-CTD2-4 75 23.1 8.22 6.66 0.208 0.009 0.593 SH-CTD2-5 100 20.9 8.15 5.18 0.230 0.136 10.4 SH-CTD2-6 150 17.4 8.08 4.74 0.240 0.033 15.5 SH-CTD2-7 200 14.8 8.04 4.47 0.186 0.012 18.5 SH-CTD2-8 300 12.5 8.01 4.33 0.197 0.019 29.2 SH-CTD2-9 500 9.0 7.93 3.36 0.273 0.013 34.0 SH-CTD3-1 3 29.5 8.21 6.64 0.175 0.005 0.332 SH-CTD3-2 30 29.1 8.21 6.65 0.142 0.007 0.349 SH-CTD3-3 50 26.7 8.21 6.79 0.153 0.013 0.149 SH-CTD3-4 75 23.7 8.21 6.62 0.230 0.000 0.502 SH-CTD3-5 100 20.6 8.15 5.14 0.251 0.152 9.44 SH-CTD3-6 150 17.3 8.07 4.54 0.262 0.006 16.9 SH-CTD3-7 200 15.0 8.08 4.43 0.208 0.008 17.3 SH-CTD3-8 300 12.8 8.01 4.23 0.219 0.005 22.1 SH-CTD3-9 500 9.0 7.91 3.26 0.197 0.017 32.4 SH-CTD4-1 3 30.0 8.20 6.42 0.175 0.013 0.373 SH-CTD4-2 30 29.1 8.20 6.47 0.175 0.009 0.282 SH-CTD4-3 50 26.5 8.20 6.63 0.317 0.010 0.357 SH-CTD4-4 75 24.3 8.19 6.68 0.142 0.260 5.29 SH-CTD4-5 100 21.0 8.12 5.89 0.230 0.154 8.13 SH-CTD4-6 150 18.0 8.12 4.47 0.230 0.013 10.1 SH-CTD4-7 200 15.2 8.09 4.13 0.164 0.009 22.6 SH-CTD4-8 300 12.2 8.04 4.34 0.175 0.006 31.0 SH-CTD4-9 500 8.8 7.99 3.45 0.197 0.013 34.9 SH-CTD5-1 3 29.6 8.19 6.35 0.120 0.002 0.423 SH-CTD5-2 30 28.0 8.19 6.53 0.175 0.005 0.266 SH-CTD5-3 50 25.8 8.19 6.71 0.197 0.006 0.622 SH-CTD5-4 75 22.3 8.15 6.71 0.153 0.156 4.29 SH-CTD5-5 100 20.4 8.10 5.32 0.120 0.037 11.3 SH-CTD5-6 150 16.5 8.06 4.64 0.175 0.006 13.3 SH-CTD5-7 200 14.9 8.04 4.47 0.213 0.011 14.1 SH-CTD5-8 300 12.3 7.98 4.45 0.153 0.006 23.7 SH-CTD5-9 500 8.7 7.91 3.32 0.120 0.005 28.0 -
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