摘要
本文对江西省泰和县伞塘的水物理、水化学、水生生物和浮游植物的初级生产力作了周年性的观察测定,其结果如下:1)水化学指标周年变动范围:溶解氧含量为4.12—9.78毫克/升,总氮含量在2.40—7.20毫克/升,总磷含量在0.06—0.30毫克/升,N/P 比值为39.2,硅酸盐含量为4.55—20.15毫克,总铁含量为0.14—0.60毫克/升,碱度为1.06—2.65毫克当量/升,硬度为0.70—2.53毫克当量/升。2)伞塘中的浮游植物的月平均分布密度为929万个/升,生物量为22.4毫克/升;浮游动物的种类有93种,种类分布有明显的季节性。伞塘中底栖动物种类不多,但数量较大,软体动物生物量达57公斤/亩。3)伞塘浮游植物的初级生产量为845.4克氧/米~2,浮游植物对太阳能的利用率只有0.28%。
This is a report of an annual observation and measurement of aqua-physical and aqua-chemical nature,hydrobios and the productivity of the phytoplankton on San Daun.The results are as follows. 1.Range of the aqua-chemical index variation: Amount of dissolved oxygen 4012-9.78mg/l Total amount of N 2.40-7.20mg/l Total amount of P 0.60-0.30mg/l Ratio of N:P 3.92 Amount of silicate 4.55-20.15mg/l Alkalinity 1.06-2.65 gram equivalent/l Hardress 0.70-2.53 gram equivalent/l 2.Monthly mean distribution density of phytoplankton 9.29 million/l Amount of biomass 22.4 mg/l Sorts of zooplankton 93 (The distribution of sorts varies with the season) Amount of molluse 57kg/mu 3.Primary productivity of phytoplankton 845.4 gram oxygen/m^2 Efficiency of the utilization of solar energy 0.28%
