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首页> 外文期刊>Rice Science >Impact of Rice-Catfish/Shrimp Co-culture on Nutrients Fluxes Across Sediment-Water Interface in Intensive Aquaculture Ponds
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Impact of Rice-Catfish/Shrimp Co-culture on Nutrients Fluxes Across Sediment-Water Interface in Intensive Aquaculture Ponds

机译：稻-鱼/虾共培养对集约化养殖池塘中沉积物-水界面中养分通量的影响

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摘要

Exchange of nitrogen and phosphorus across sediment-water interface plays an important role in the management of nutrient recycling in the aquaculture pond. In this study, a plot experiment was conducted to study the effect of rice-catfish/shrimp co-culture on the micro-profile of oxygen (O2), pH and nutrient exchange across sediment-water interface in the intensive culture ponds. The results showed that rice-catfish co-culture increased the concentration and penetrating depth of O2, but decreased the pH value across the sediment-water interface, compared with catfish monoculture. Additional rice cultivation significantly reduced the flux rates of ammonium (NH4+) and nitrate (NO3?) across sediment-water interface in the catfish and shrimp ponds. The flux rates of NO2?and soluble phosphorus (PO43?) showed no significant difference between rice-catfish/shrimp co-culture ponds and catfish/shrimp monoculture ponds. Rice only affected the dissolved inorganic nitrogen and phosphorus fractions in the sediment. The concentrations of NH4+were significantly lower in the sediment of co-culture ponds than in the monoculture ponds. Additional rice cultivation also significantly reduced the content and percentage of dissolved inorganic phosphorus in the sediment of catfish ponds.
机译：氮和磷在沉积物-水界面的交换在水产养殖池塘养分循环管理中起着重要作用。在这项研究中，进行了一项小区试验，以研究水稻-fish鱼/虾共培养对集约化养殖池中沉积物-水界面上的氧气（O2），pH和养分交换的微观特征的影响。结果表明，与cat鱼单一养殖相比，稻-鱼共培养增加了O2的浓度和渗透深度，但降低了沉积物-水界面的pH值。额外的水稻种植显着降低了the鱼和虾塘中沉积物-水界面的铵态氮（NH4 +）和硝酸盐（NO3？）通量。稻-鱼/虾共养池和cat鱼/虾单养池之间的NO2 +和可溶性磷（PO43）通量率没有显着差异。水稻仅影响沉积物中溶解的无机氮和磷组分。共培养池沉积物中的NH4 +浓度显着低于单养池。额外的水稻种植也显着降低了fish鱼池塘沉积物中溶解的无机磷的含量和百分比。

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