三江平原池塘水化学特性的研究

THE STUDY ON WATER CHEMICAL PROPERTIES IN POND IN SANJIANG PLAIN

本文应用常规分析手段对池塘水体中的O_2、CO_2、pH、阴离子、阳离子及营养元素进行了研究。O_2、CO_2、pH值都呈现昼夜变化,三者间具有一定的相关性。主要离子含量的特点为:HCO_3^-+CO_3^(2-)>Ca^(2+)+Mg^(2+)。营养元素都具昼夜变化和季节变化。无机氮的平均含量为0.239mg/L,可溶性磷酸盐的平均含量为0.057mg/L,二者比值为2.62。总氮与总磷的平均含量分别为3.77mg/L和0.885mg/L,二者比值为4.26。与其它地区相比,三江平原池塘水体中磷含量高而氮含量过低已成为浮游植物增殖的限制因子。

The study on O_2, Co_2, pH, negative ions, positive ions and nutrient elements in the water have been carried out with general analysis method in this paper. There are diel changes of dissolved oxygen, carbon dioxide and pH in the water of pond, they are correlated each other. The special character of main ions in the water is :HCO_3^-+CO_3^(2-)>Ca^(2+)+Mg^(2+). The nutrient elements have diel and seasonal changes. The mean content of inorganic nitrogen is ab out 0.239mg/L and that of P_2O_5 is about 0.057mg/L, ratio of them is 2.62. The mean contents of total N and total P are 3.77mg/L and 0.885mg/L, and ratio of total N and total P is 4.26. Compared with that in other parts of china, The content of P is higher and that of N is lower, which becomes limited factots in the growth of phytoplanktons in ponds in Sanjiang plain.