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安乡县珊珀湖,面积2.1万亩,属浅水老年湖泊,长期以来鱼产量作马鞍型波动,从1973—1984年平均亩产不足10.5公斤,1984年仅产鱼175吨,1985年试用人工施肥,获得初步效果,但是1984和1985两年亩产平均也只有10.75公斤。珊珀湖养殖增殖技术研究课题从1986年开始,经过三年研究,产量逐年上升,三年来花白鲢亩产为15.52公斤、17.9公斤,21.13公斤,见表1。本文试从科学施肥,合理放养与合理捕捞三个方面论述珊珀湖花白鲢增产的途径。一、科学施肥珊珀湖由于自然条件的演变和人为的干扰、已酷似一个大池塘、高水期全湖平均水深仅1.17米,局部深区不超过2.7米,污泥厚,有机质丰富,全湖只两处大闸口
Anxiang County, Lake Parker Lake, an area of 21000 acres, is a shallow lake in the elderly, fish production for a long time as a saddle-shaped fluctuations, from 1973 to 1984, the average yield less than 10.5 kg, only produce fish in 1984, 175 tons, 1985 trial artificial Fertilization, to obtain the initial effect, but in 1984 and 1985 average per mu only 10.75 kg. The research project of breeding and multiplication of Lake San Po started from 1986 and after three years of research, the output increased year by year. The annual output of silver carp was 15.52 kg, 17.9 kg and 21.13 kg in three years. This paper tries to discuss the ways of yield increasing of silver carp in Shan Lake by three aspects of scientific fertilization, reasonable stocking and reasonable fishing. First, scientific fertilization As the evolution of natural conditions and man-made interference, Lake Parker resembles a large pond, the average high-water lake length of only 1.17 meters, not more than 2.7 meters deep in some areas, sludge thick, rich in organic matter, all Lake two gates