对虾海水高密度养殖后期水质因子的昼夜变化规律  

Diurnal variation of water quality factors in late period of intensive seawater shrimp culture

作　　者：李奕雯[1] 李卓佳[1] 曹煜成[1] 文国樑[1] 刘孝竹[1] 

机构地区：[1]中国水产科学研究院南海水产研究所,广东广州510300

出　　处：《南方水产》2010年第6期26-31,共6页South China Fisheries Science

基　　金：现代农业(虾)产业技术体系建设专项资金(NYCYTX-46);国家科技支撑计划项目(2006BAD09A07;2007BAD29B06);中央级公益性科研院所基本科研业务费专项资金(中国水产科学研究院南海水产研究所)资助项目(2010YD05);国家自然科学基金项目(30800851);公益性行业(农业)科研专项(nyhyzx07-042;200803012);广东省科技计划项目(2009B020201001);广东省科技计划国家重大科技项目匹配资助项目(粤科函财字[2009]627号);广东省海洋渔业科技推广专项(A200899A06);广东省鱼病防治专项(2130108)

摘　　要：2008年7月5～6日,对广东汕尾红海湾对虾养殖场养殖87～88d的海水高密度半封闭养殖虾池水质进行每4h监测分析,旨在了解养殖后期昼夜水质变化状况,为合理和即时调控养殖后期水质提供相关理论数据。结果显示,24h内水质指标除化学需氧量(COD)和无机氮(DIN)基本稳定外,其他因子均有较大波动。其中氨氮(NH4+-N)在3:00达到高峰,5:00落至低谷,9:00又达到高峰;亚硝酸盐氮(NO2--N)的变化却相反,在3:00落至低谷,5:00达到高峰,9:00又落至低谷;pH和溶解氧(DO)均在5:00降至最低,13:00上升到最高。结果表明,3:00～9:00是虾池水质变动的关键时期,应留意水质变化,适时采取合理增氧措施并投洒相应水质调节剂以提高ρ(DO),减少NH4+-N和NO2--N产生及降低其毒性。On July 5～6,2008,we carried out a survey on the intensive semi-enclosed seawater shrimp ponds at Honghai Bay,Shanwei,Guangdong which had cultured shrimps for 87～88 d,monitoring the water quality every 4 h to study the diurnal variation of water quality in the late culture period and to provide theoretical reference for a reasonable,instant water quality regulation for that period.Results show that most water quality factors have an obvious diurnal variation except COD and DIN.NH＋4-N peaks at 3：00 and 9：00 and bottoms at 5：00 while NO-2-N bottoms at 3：00 and 9：00 and peaks at 5：00.Both pH and DO bottom at 5：00 and peak at 13：00.Therefore,the water quality changes quickly during 3：00～9：00,and it is important to pay attention to the variation and take measures such as adding water quality regulator to increase DO value,and to reduce the production of NH＋4-N,NO-2-N and their toxicity.

关 键 词：对虾养殖 水质 周日变化 

分 类 号：S917[农业科学—水产科学]