史氏鲟南移驯养及生物学的研究:Ⅴ-鱼池水质的变化与管理

DOMESTICATION OF AMUR STURGEON (ACIPENSER SCHRENCKII) IN THE CENTRAL PART OF CHINA AND ITS BIOLOGY: Ⅴ.VARIATION AND MANAGEMENT OF WATER QUALITY IN CULTURE POND

本文监测了史氏鲟商品鱼养殖池中4 个主要常见的水质指标的变化规律,水中氨氮和溶氧的日变化幅度较大,变化规律较强,氨氮变化值在0-1900 ～0-0257mg/L 之间,溶解氧的变化范围在4-27 ～5-81mg/L之间;pH 值和水温的日变化幅度很小,pH 值变化在7-69 ～7-36 之间,水温的变化值在19-44 ～19-37 ℃之间。探讨了引起水质变化的主要因素,并提出了对水质进行管理和控制的方法。

Observations and analyses of the daily water quality variation of Amur sturgeon,Acipenser schrenckii,culture pond were performed.Four items,concentration of NH + 4-N,dissolved oxygen,pH value and water temperature,were investigated.Among those items,the concentration of NH + 4-N was 0.1900～0.0257mg/L,and the dissoved oxygen was 4.27～5.81mg/L.According to the variation features of water quality,we made suggestions on when and how to replace pond water with fresh water in order to keep water quality better.