论文部分内容阅读
冬季因气温低,越冬鱼种易受冻害,成活率比较低。近年我们采用生态调节法提高鱼池温度,既增强鱼类在冬季的摄食能力,保持膘度,又减少冻害提高了成活率。经测定:此法可比其它鱼池的水温升高2℃左右(阴雨雪天除外),无风的晴天随气温升高水温可升到3℃以上,鱼种越冬成活率由过去的60%—70%提高到80%—90%以上,而且简便易行,具体方法是:
Winter due to low temperatures, wintering fish vulnerable to cold damage, survival rate is relatively low. In recent years, we use ecological regulation method to raise the pond temperature, which not only enhances the ability of fish to ingest food in winter, but also reduces the frost damage and improves the survival rate. It is determined that the water temperature of this method can be increased by about 2 ℃ (except rainy and snowy days) when compared with other fish ponds, and the temperature can rise to above 3 ℃ with no wind in sunny days. Overwintering survival rate of fish species varies from 60% 70% to 80% -90% or more, and easy, the specific method is: