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鱼种放养适宜与否,不仅能影响鱼体的生长和成活率,而且直接关系到养殖效果的好坏。因此,池塘的鱼种放养一向被认为是养殖生产中一项关键技术。要搞好这一工作,必须从池塘生态系统的结构特点和放养种类,规格与数量以及饲养管理技术等方面加以分析,因地制宜地正确掌握,才能充分发挥水体生产潜力,取得较好的经济效益。 一、池塘生态系统结构的特点 池塘生态系统的结构,在生物群落组成方面,消费者生物和生产者生物不如湖泊、江河等天然水体复杂。池塘中除了所放养的几种养殖鱼类以外,其他主要是小型的饵料生物。但是,池塘水中有机物质比天然水体丰富,饵料生物密度较大。据测定,汉口养殖场
The stocking appropriate or not, not only can affect the growth and survival of fish, but also directly related to the quality of farming is good or bad. As a result, pond stocking has always been considered a key technology in farmed production. To do a good job, we must analyze the structural characteristics of the pond ecosystem and the types of stocking, specifications and quantity as well as the feeding and management techniques, and correctly grasp the local conditions in order to give full play to the potential of water production and achieve better economic benefits. First, the characteristics of pond ecosystem structure Pond ecosystem structure, in the composition of biological communities, consumer organisms and producers of biological organisms such as lakes, rivers and other natural water complex. In addition to the pond stocked several species of farmed fish, the other is mainly small bait organisms. However, organic matter in pond water is more abundant than natural water and has a high biomass density. According to the determination, Hankou farms