中型浅水湖泊人工施化肥技术及其效果研究

本文根据1986—1988年3年来对珊珀湖人工施化肥的效果和对水体N、P运动的动力学观察写成,论述中型、浅水、有机质丰富的老年湖泊的浮游生物繁殖高峰期(6、7、8、9月)进行人工定点、定时、定量、分批施化肥,是改善湖泊水质,使水体从严重缺磷(N∶P=223.8∶1)改变为缺磷(N∶P=6.6∶1)的有效途径。可以增加N、P含量、改变浮游生物群落结构,加快浮游生物的繁衍,从而提高水体的初级生产力及其对滤食性鱼类的负载力,进而提高湖泊的经济,社会效益。

STUDIES ON THE TECHNOLOGY AND ITS EFFECT OF ARTIFICIAL FERTILIZATION IN MEDIUMSIZED AND SHALLOW LAKE

According to fertilization effect and observation to N. P motion's dynamics of water body during the three years (1986-1988), this paper discusses the methods of applying nitrogen and phosphate with artificial fixed position, set a time, fixed quantity and in batches in the old-age lake of medium-sized over 20 thousand mu, shallow water with rich organic matter in the peak period (6, 7, 8, 9months) of plankton reproduction. It can improve water quality of lake, which was changed from the seriously laching P (N: P=223.8:1) into normal (N: P=6.6:1), increase N, P contents, change the composition of planktonic community, increase gradually in number or quantity, raise primary productivity of the water body, and increase load quantity of the water body to filter-tipped fishes. And it can efficiently raise ecological, economic and social benefite of the lake. Thus, we are setting forth that this technology of artificial fertilization in the medium -sized and shallow lake is really feasible.