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汉寿县水产研究所是我省洞庭湖区商品鱼基地之一,有精养成鱼池175亩,连年来单产都在600公斤以上。其养鱼高产技术关键在于控制池塘水质的稳定性以提高池塘水体的载鱼量,分析这种高产池塘水体中浮游生物种群结构的变化规律,将有助于池塘高产技术的推广。工作方法在该所11口成鱼塘中,固定集中两口塘:2港(18.2亩)与4塘(16亩)进行观察研究,从1984年3至10月在塘的中心点每月两次分上、中、下三层采取混合水样。镜检方法:浮游植物、原生动物与极小型轮虫采用一升水样两次浓缩后,用0.1毫升的计算框,在显微
Hanshou County Fisheries Research Institute is the Dongting Lake District, one of the commodity fish base, intensive fish pond 175 acres, over the years to yield more than 600 kilograms. The key to its high-yielding fish culture lies in the control of the stability of pond water quality in order to increase the carrying capacity of pond water bodies. The analysis of the variation of plankton population structure in this high-yielding pond water body will be helpful for the popularization of high-yielding pond technology. Methods of Work In the 11 fishponds in the pond, two ponds were fixed: observation of 18 ports of 2 estates and 4 acres of ponds (16 acres) from March to October 1984 at the center of the pond twice a month Points on the middle and lower levels to take a mixed water sample. Microscopic examination methods: phytoplankton, protozoa and small rotifers using a liter of water samples twice concentrated, with 0.1 ml of the calculation box, microscopic