不同水肥管理对热带稻田氮磷流失的影响

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中图分类号：X71;S511 文献标志码：A 文章编号：1672-2043（2025）10-2605-12 doi：10.11654/jaes.2024-1167

Abstract：Toivestigatethefectsofdifentwateradfertlirmanagemntpractisonrogeandposphousssinpaddyfiels in tropicalregios，feldexpermetwasonucedinhvrgatedcesofngnToHainanProvine.Atwoctorul designwasdoed，ittortilatioodsset：rcusdertiltioF）ndtiedertilaio（2）sl irigationmoessllorgi（W）nddedao（W2），totalinfourreaentsF2F2W，F） thechurcharacteristicsofnitrogenandphosphorus.Theresultsshowthatbothfertilizationmodeandiigationmodehavesignifcant impactsontheunoffndleachingofirogeandphosphorus，ndthereisasignificantinteractionbetweenthem.Comparedwithfarer accustomedfertilzatio，thesfacewateritrogenunofflossandseepageleachnglossofotimzdfertlationecreasdby4609 % 一 （20 51.09% and 57.74% -62.73%respectively，while the phosphorus runofflossand seepage leaching loss decreased by54.14%-54.86% and （20 23.10%-43.23% respectively.Under thecondition ofoptimized fertilization，the surface water nitrogen and phosphorus runoff losses of shallow wet irrigation decreased by 14.65% and 45.02% respectively compared with those of flooded irrigation.However， the nitrogen seepage leaching loss of shallow wet irrigation increased by 58.76% compared with that offlooded irrigation，and there wasno significant diferenceinhehosporussepagelecinglsseteesallowwetiigatonndfoedigatio.Overall，theotalenad phosphorus emissions under different water and fertilizer managements were F1W2 > F1W1>F2W2>F2W1.It canbe seen that the optimizedfertilizationombinedwiththeshalowwetiigationwaterandfrilizermanagementodesignificantlyreducsthtotal nitrogenandposposmissseivelylvatingteobutioofrognndpopuslossinaddyfdstolual non-point source pollution.

Keywords ：paddy field; nitrogen and phosphorus loss; water and fertilizer management; runoff loss;leaching loss

水稻作为我国主要的粮食作物，种植面积约占农作物总种植面积的 24% ，在保障国家粮食安全、国民经济和社会发展中发挥重要作用1。（剩余22688字）