龙海西边综合养殖系统主要环境因子的变化

Changes of Main Environmental Factors of Composite Culture System in Longhai Xibian

1999年 9月至 2 0 0 0年 7月 ,用海水分析方法每月检测龙海西边综合养殖系统 9个水质理化因子和 2个沉积物指标 ,结果表明水质指标变化范围是 :水温 12～ 31℃、盐度 1.84～ 19.6 1、透明度 2 0～ 70cm、pH值 7.32～ 10 .14、氨氮 (NH+ 4 N +NH3 N) 0～ 0 .0 80mg/dm3 、亚硝酸氮 (NO-2 N) 0～ 0 .0 33mg/dm3 、硝酸氮 (NO-3 N) 0～ 0 .2 71mg/dm3 、磷酸盐 (PO3 -4 P) 0～ 0 .0 10mg/dm3 、化学需氧量 (CODMn) 1.91～ 10 .6 3mg/dm3 ;沉积物中硫化物 (S2 -)和有机质的变化范围分别是 72 .0 6～ 6 84.77mg/kg和 1.2 1%～ 5 .87% .该综合养殖系统底质污染较严重 ,养殖效益不显著 .

With seawater chemical analysis technique, the nine seawater physical and chemical factors on waters and two chemical factors on sediment of composite culture system in Longhai Xibian were examined each month from September 1999 to July 2000. The ranges of the factors of waters were as follows: seawater temperature 12～31 ℃, salinity 1.84～19.61, transparency 20～70 cm, ammonia N (NH + 4 N + NH 3 N) 0～0.080 mg/dm 3, nitrite N (NO - 2 N) 0～0.033 mg/dm 3, nitrate N (NO - 3 N) 0～0.271 mg/dm 3, phosphate P (PO 3- 4 P) 0～0.010 mg/dm 3, pH 7.32～10.14, Chemical Oxygen Demand (COD Mn ) 1.91 ～10.63 mg/dm 3;The ranges of sulphide and organic matters of sediment were 72.06～684.77 mg/kg and 1.21% ～5.87%. Pollution of sediment in the composite culture was considerably serious and the culture benefit was not remarkable.