Currently used seawater pond culture models are evaluated, and principles and methods in optimizing pond culture model are discussed in the present paper. The author indicates that application of the traditional polyc...Currently used seawater pond culture models are evaluated, and principles and methods in optimizing pond culture model are discussed in the present paper. The author indicates that application of the traditional polyculture has been limited in single pond. Inputted nutrients such as feed and fertilizer can’t be efficiently utilized by animals cultured in a pond with the traditional polyculture, resulting in huge waste discharge, which is regarded as a pollution source to coastal regions. The author suggests it should be possible to put several seawater ponds with different stocking structures together and optimize stocking and management systemically. Compared with the traditionally polycultured seawater ponds, ecological benefits and nutrients transport in the systemically optimized ponds would be amplified. The production performance of the systemically optimized ponds, therefore, would be increased and their pollution would be reduced.展开更多
Experiments were conducted from June to September, 1995 in a controlled integrated culture pond-enclosure ecosystem.The principal objective of this study was to quantify the rate of heterotrophic bacterioplankton prod...Experiments were conducted from June to September, 1995 in a controlled integrated culture pond-enclosure ecosystem.The principal objective of this study was to quantify the rate of heterotrophic bacterioplankton production in situ in a fertilization pond ecosystem.This paper presents a method by which bacterial production was estimated through incubation in situ and measurement of increased bacterial abundance with time. Bacterial growth rates. production and tumover per day during the periods of culture were estimated. The influence of zooplankton grazing, substrate limiting and water temperature on the bacterial growth rates and production were studied also.展开更多
为阐明不同生态养殖池塘浮游细菌数量变化规律及其与环境因子间的相关性,以期为多元立体综合养殖模式中的水质安全与生物疾病防控提供科学依据。利用荧光显微镜细菌计数法(Acridine Orange Direct Counting),研究了“参-虾”“蟹-蛏”...为阐明不同生态养殖池塘浮游细菌数量变化规律及其与环境因子间的相关性,以期为多元立体综合养殖模式中的水质安全与生物疾病防控提供科学依据。利用荧光显微镜细菌计数法(Acridine Orange Direct Counting),研究了“参-虾”“蟹-蛏”和“蜇-蛏”三种海水生态养殖池塘的细菌数量特征,使用典范对应分析(Canonical Correspondence Analysis,CCA)探讨细菌数量与环境因子的相互关系。结果表明,“参-虾”“蟹-蛏”和“蜇-蛏”池塘的细菌平均密度分别为(0.49~3.32)×10^(5)cell/mL、(0.52~2.98)×10^(5)cell/mL和(0.47~2.55)×10^(5)cell/mL,细菌数量有明显的时间差异,夏季密度大于春秋季。三种海水生态养殖池塘的水温、溶解氧和pH变化均不明显,且相差不大,而硝态氮均发生显著变化;其中“蟹-蛏”和“蜇-蛏”池塘的硝态氮、亚硝态氮、活性磷、总氮和总磷均高于“参-虾”池塘,透明度、叶绿素a和化学耗氧量则均低于“参-虾”池塘。典范对应分析(CCA)结果显示,三种海水生态养殖池塘细菌数量的主要环境驱动因子不同,细菌数量均与水温呈显著正相关(P<0.05),“蟹-蛏”和“蜇-蛏”池塘细菌数量均与总磷呈显著正相关(P<0.05);细菌数量的驱动因子有明显的时间差异,但规律不明显。展开更多
文摘Currently used seawater pond culture models are evaluated, and principles and methods in optimizing pond culture model are discussed in the present paper. The author indicates that application of the traditional polyculture has been limited in single pond. Inputted nutrients such as feed and fertilizer can’t be efficiently utilized by animals cultured in a pond with the traditional polyculture, resulting in huge waste discharge, which is regarded as a pollution source to coastal regions. The author suggests it should be possible to put several seawater ponds with different stocking structures together and optimize stocking and management systemically. Compared with the traditionally polycultured seawater ponds, ecological benefits and nutrients transport in the systemically optimized ponds would be amplified. The production performance of the systemically optimized ponds, therefore, would be increased and their pollution would be reduced.
文摘Experiments were conducted from June to September, 1995 in a controlled integrated culture pond-enclosure ecosystem.The principal objective of this study was to quantify the rate of heterotrophic bacterioplankton production in situ in a fertilization pond ecosystem.This paper presents a method by which bacterial production was estimated through incubation in situ and measurement of increased bacterial abundance with time. Bacterial growth rates. production and tumover per day during the periods of culture were estimated. The influence of zooplankton grazing, substrate limiting and water temperature on the bacterial growth rates and production were studied also.
