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.

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（O ₂），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O ₂的浓度和渗透深度，但降低了沉积物-水界面的pH值。附加水稻栽培显著减少铵的通量率（NH ₄ ⁺）和硝酸盐（NO ₃ ^-）穿过the鱼和虾塘中的沉积物-水界面。NO的通量速率₂ ^-和可溶性磷（PO ₄ ^3-）显示稻鲶鱼/虾共培养池塘和鲶鱼/虾单养鱼塘之间没有显著差异。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NH ₄ ⁺浓度明显低于单培养池。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。