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
A method for monitoring biological prodation of oxygen was used in the July 10September 15, 1995 study on the limiting nutrients in eight land-based 5 m × 5 m encloome equipped with waer stirrers in a Seawater po...A method for monitoring biological prodation of oxygen was used in the July 10September 15, 1995 study on the limiting nutrients in eight land-based 5 m × 5 m encloome equipped with waer stirrers in a Seawater pond in the study region (Yellow Sea). Chicken manare only, chicken manare combined with chemical fertilizers, and chemical fertilizers only, were put into the enclosures,respectively. The results showed that phosphorus was the lmiting nutrient; and that the optimal N: P ratio of the fertilizers was 7.25 - 7.54 (mean of 7.37), which was significantly lower than the ratio measured in the water, as phosphorus deposited is easily absorbed by sediments and is excessively uptaken by phytoplankton. The above optimal N: P ratio is suitable for daily fertization with combination fertilizer in the seawater ponds.展开更多
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.
文摘A method for monitoring biological prodation of oxygen was used in the July 10September 15, 1995 study on the limiting nutrients in eight land-based 5 m × 5 m encloome equipped with waer stirrers in a Seawater pond in the study region (Yellow Sea). Chicken manare only, chicken manare combined with chemical fertilizers, and chemical fertilizers only, were put into the enclosures,respectively. The results showed that phosphorus was the lmiting nutrient; and that the optimal N: P ratio of the fertilizers was 7.25 - 7.54 (mean of 7.37), which was significantly lower than the ratio measured in the water, as phosphorus deposited is easily absorbed by sediments and is excessively uptaken by phytoplankton. The above optimal N: P ratio is suitable for daily fertization with combination fertilizer in the seawater ponds.
