论文部分内容阅读
春季的亲鱼池,经过较长时间的越冬,池中积累了较多的有机质。同时,春季水温逐升,水体呈现分层状态,上层水温高、密度小,不能下沉;下层水温低、密度大,沉于水底;在上下层之间还有一个温度变化较大的温跃层。这种分层状态不能自由流转混合。如果数日晴天高温,天气闷热雷雨,水的分层状况就会被破坏。上层水温度骤降、密度增大、
Spring broodstock pool, after a long period of winter, the pool accumulated more organic matter. At the same time, the spring water temperature rises, the water body presents stratified state, the upper water temperature is high, the density is small, can not sink; the lower the water temperature is low, the density is big, settles in the water bottom; Between the upper and lower layers also has the big temperature change big warm jump Floor. This hierarchical state can not be freely mixed. If the sunny days of high temperature, the weather was thunderstorms, the water layering will be destroyed. The water temperature plunged, the density increased,