地表水与地下水对小龙虾稻田养殖效果影响的对照实验OA

With the continuous development of the domestic economy and the upgrading of market consumption de-mand,the red swamp crayfish(Procambarus clarkii)industry has developed into a complete industrial system.The integrated rice-crayfish farming model explored in Northeast China has become one of the major models driving the development of local ecological circular agriculture.To identify the optimal water source for crayfish culture in rice fields in Northeast China,two treatments,namely surface water(irrigation water)and groundwater(well water),were set up in this experiment,with three replicate rice fields(1 mu per field)in each treatment.Water quality parameters,growth performance and economic benefits of crayfish were monitored during the 50-day culture period.The results showed that the average water temperature(25.3±1.2)℃and dissolved oxygen(7.0±0.8)mg/L in the surface water group were significantly higher(P<0.05)than those in the groundwater group(23.1±0.9)℃and(5.0±0.6)mg/L,respectively.The average harvest weight of crayfish in the surface water group(45.6±2.8)g was significantly higher(P<0.05)than that in the groundwater group(42.1±1.9)g.The recapture rate of the sur-face water group was(55.2±1.2)%,slightly higher than(54.3±1.1)%of the groundwater group,with no signifi-cant difference(P>0.05).For economic benefits,the profit per mu in the surface water group reached(567.2±32.4)yuan,which was significantly higher(P<0.05)than(376.6±27.6)yuan in the groundwater group.Under the conditions of this experiment,surface water is more suitable for crayfish culture in rice fields in Northeast China due to its suitable temperature,sufficient dissolved oxygen,and abundant natural food organisms.If only groundwa-ter is available,extra costs and effective treatment measures should be adopted to improve water quality so as to meet the growth requirements of crayfish.