论文部分内容阅读
初级生产力又称原初生产力,指的是自养生物在单位时间、单位空间内合成有机质的量。它是水体生物生产的基础,是食物链的第一个环节,是反映水体渔业生产潜力的基本参量。因此,在发展刘家峡水库渔业生产时,就有必要对其进行研究。刘家峡水库是一个以外源性有机质为主的开放式能量循环系统。因此,初级生产力不仅包括水库本身的自养生物——浮游植物的繁殖能力(内源性的),而且还包括各补给河流从地表径流带来的大量腐屑(外源性的)。现从这两个方面进行论述,以期为确定放养指标和提高鱼产量提供科学依据。
Primary productivity, also known as primary productivity, refers to the amount of organic matter synthesized by the autotrophs in unit time and in unit space. It is the basis of water biological production, is the first link in the food chain, and is a basic parameter reflecting the potential of water production in fisheries. Therefore, in the development of Liujiaxia reservoir fishery production, it is necessary to study it. Liujiaxia Reservoir is an open-ended energy circulation system dominated by exogenous organic matter. Therefore, primary productivity includes not only the (endogenous) reproductive capacity of the reservoir’s own autotrophic-phytoplankton, but also the large amount of decay (exogenous) that the recharge rivers bring from surface runoff. These two aspects are discussed now, with a view to providing a scientific basis for the determination of stocking indicators and the enhancement of fish production.