论文部分内容阅读
养殖罗氏沼虾虽然其经济效益比池塘养鱼要高,但是风险较大,原因是罗氏沼虾属热带虾类,对水温要求比较高,其生长的适宜温度在18℃以上,生长期比较短,江浙一带只有5个月的时间。此外,罗氏沼虾对水质,池塘底质及饲料的要求较一般鱼类高,需要的资金投入也就较大。由于罗氏沼虾具有互相残食的特点,因此其饲养的成活率也不稳定。因此,要想提高罗氏沼虾养殖的经济效益,必须针对上述基本因素,在经营管理
Although Macrobrachium rosenbergii is economically more potent than fish in ponds, it is more risky because Macrobrachium rosenbergii is a tropical shrimp species with relatively high temperature requirements. Its optimum temperature for growth is above 18 ° C and the growth period is relatively short , Jiangsu and Zhejiang area only 5 months time. In addition, the Macrobrachium rosenbergii water quality, pond sediment and feed requirements higher than the average fish, the capital investment required is greater. Since Macrobrachium rosenbergii has the characteristics of eating each other, its feeding survival rate is not stable. Therefore, in order to improve the economic benefits of Macrobrachium rosenbergii culture, we must address the above basic factors in the management