重盐碱地池塘养殖期水体理化因子变化特点

Variety Characteristics of Physical and Chemical Factors in Breeding Period Ponds in Saline Area

对黄河下游利津重盐碱地池塘的水化学进行了分析。结果表明:1)该类水体水型基本为Cl_(Ⅱ)^(Na),总含盐量899.6～3 336.6 mg/L,在阴离子中.Cl^->SO_4^(2-)>HCO_3^-+CO_3^(2-),其含量分别为703.52 mg/L,302.83 mg/L和167.82 mg/L。阳离子的含量顺序为K^++Na^+>1/2Mg^(2+)>1/2Ca^(2+)。其含量分别为479.43 mg/L,92.21mg/L,72.29 mg/L。2)各塘总碱度平均值为2.12～4.29 mmol/L,其组成主要是HCO_3-碱度;pH为8.37～8.96,极值范围为8.10～10.39;总硬度含量较高,各塘平均在8.08～14.35 mmol/L,极值范围为7.05～17.20 mmol/L。养鱼池塘的Ca^(2+)含量大于Mg^(2+)含量,而养虾池塘Mg^(2+)含量大于Ca^(2+)的含量。3)氮的含量较适合浮游植物的生长,而大部分养虾池塘总磷的含量很低,但养鱼池塘总磷含量相对较高。

We analysis the water chemistry of heavy saline ponds in Lijin,which lies in downriver area of Huanghe River.The analysis results indicate that:1)The water type in those ponds is basically Cl_Ⅱ^(Na),and the total salinity is 899.6～3 336.6 mg/L.For anion,Cl^->SO_4^(2-)>HCO_3^-+CO_3^(2-),the concentration of these anions respectively is 703.52 mg/L,302.83 mg/L and 167.82 mg/ L.For cation,K^+>N_a^+>1/2Mg^(2+)>1/2Ca^(2+),the concentration respectively is 479.43 mg/L,92.21 mg/L and 72.29 mg/L. 2)The average value of total alkalinity in all ponds is 2.12～4.29 mmol/L,and its main component is HCO_3 alkalinity;pH is 8.37～8.96,and the extremum scope is 8.10～10.39;the total hardness is comparatively high,and the average value of all ponds is 8.08～14.35 mmol/L,and the extremum scope is 7.05～17.20mmol/L;the concentration of Ca^(2+)is higher than that of Mg^(2+)in fish ponds,while in shrimp ponds,the concentration of Mg^(2+) is higher than that of Ca^(2+).3)The concentration of N is suitable for the growth of phytoplankton.In most shrimp ponds,the total concentration of P is pretty low,but that in fish ponds is comparatively high.