摘要
2009年4-9月期间,对上海市奉贤区某凡纳滨对虾养殖场22个养殖池塘水体叶绿素a、水温、pH、溶解氧、透明度、悬浮物(SS)、总有机碳(TOC)、五日生化需氧量(BOD5)、高锰酸盐指数(CODMn)等15项水质因子进行测定。取164组测定数据,进行描述性统计,分析叶绿素a与各项因子的相关性系数。分析结果显示,与叶绿素a呈极显著线性正相关的水质因子为SS、TOC、BOD5、CODMn、TN、TP;呈显著正相关的为DO;而叶绿素a与透明度呈极显著线性负相关,与PO43--P呈显著线性负相关;与水温、pH、NO2--N、NO3--N、NH3-N则未呈现显著相关性。根据多元线性回归选择自变量的原则,选择了TOC、TN、PO34--P和TP4项水质因子,建立了叶绿素a与4项水质因子的逐步回归模型:Chl.a=-0.0545+0.00349TOC+0.0153TN-0.418PO43--P+0.276TP(r=0.7155)。利用偏回归系数检验各水质因子对叶绿素a的影响,结果表明,对叶绿素a影响从大到小依次是TP、TOC、PO34--P和TN。研究结果对进一步探讨养殖池塘生态系统的变化规律及水环境质量保护提供了依据。
Water quality parameters in 22 ponds of a Litopenaeus vannamei culture farm in Fengxian District of Shanghai were investigated from April to September in 2009.Fifteen parameters including chlorophyll-a（Chl.a） ,temperature,pH,dissolved oxygen （DO） ,transparency,suspended substance （SS） ,total organic carbon （TOC） ,biological oxygen demand（BOD5） ,chemical oxygen demand（CODMn） ,nitrite nitrogen（NO2-N） ,nitrate nitrogen（NO 3-N） ,ammonia nitrogen（NH3-N） ,total nitrogen（TN） ,active phosphorus（PO43--P） and total phosphorus（TP） were determined.Descriptive statistics was conducted and the correlation between Chl.a and other parameters was analyzed.The statistical analysis results showed that Chl.a had extremely significantly linear positive correlation with SS,TOC,BOD5,CODMn,TN and TP.Significantly linear positive correlation existed between Chl.a and DO.Extremely significantly linear negative correlation was confirmed between Chl.a and transparency while Chl.a had significantly linear negative correlation with PO34--P.Chl.a had no significant correlation with water temperature,pH,NO 2-N,NO 3-N and NH3-N.According to the principles of selecting independent variables in the multiple linear regression analysis,four water quality parameters including TOC,TN,PO34--P and TP were used for establishing the stepwise regression model which was Chl.a =-0.054 5 ＋ 0.003 49 TOC ＋ 0.015 3 TN-0.418 PO43--P ＋ 0.276 TP（r = 0.715 5） .The effects of these four factors on Chl.a were tested using the partial regression coefficient.The most influential water quality parameter on Chl.a were TP and then TOC,PO34--P,TN in turn.The results would help further study on ecological rules and water environmental protection in aquaculture ponds.
出处
《水产学报》
CAS
CSCD
北大核心
2010年第11期1712-1718,共7页
Journal of Fisheries of China
基金
美国ACRSP项目(09BMA05UM)
上海市农委推广项目[沪农科推字(2008)第5-1号]
上海市教委重点学科建设项目(J50701)
关键词
凡纳滨对虾
叶绿素A
水质因子
相关性分析
多元逐步回归分析
Litopenaeus vannamei
chlorophyll-a
water quality parameters
correlation analysis
multiple stepwise regression analysis
