关键词: 黄鳝, 克氏原螯虾, 水稻, 经济效益

Abstract: The growth status and economic benefits of finless eel （Monopterus albus） and shrimp（Procambarus clarkii） in rice-shrimp-finless eel co-cropped rice fields with three stocking densities of finless eel （3 000, 6 000, 9 000 tails/hm², each with 3 parallels） and rice-shrimp co-cropped rice fields （control group） were compared. After 109 days of breeding, the weight of P. clarkii increased from an average of 5.13 g/tail to 30.4 g/tail. M. albus gains from an average of 42.6 g/tail to 132.5 g tail; and the recovery rate reached 79.1%. The net profit of the three test groups and the control group was 79 120, 72 882, 63 213, and 50 820 yuan/hm². The rice yield of the rice-shrimp-finless eel group was significantly higher than that of the rice-shrimp group, and the yield of P. clarkii was slightly lower than that of the rice shrimp group, but there was no significant difference between the two groups. The terminal body weight and weight gain rate of P. clarkii were significantly lower than those of the control group, indicating that proper stocking of M. albus in shrimp paddy fields would affect the specifications and yield of P. clarkii to some extent. However, it has brought about an increase in rice production and additional income from M. albus, which can significantly increase the comprehensive economic benefits of shrimp and paddy fields.

Key words: Monopterus albus, Procambarus clarkii, Oryza sativa L., economic benefit