中国水稻科学2026，Vol.40Issue(5)：632-647,16.DOI:10.16819/j.1001-7216.2026.251008
滴灌配施不同形态氮肥管理对水稻根际氮转化过程及产量形成的影响
Effects of Drip Irrigation Combined with Different Nitrogen Form Management Practices on Rhizospheric Nitrogen Transformation Process and Yield Formation in Rice
摘要
Abstract
[Objective]A field experiment was conducted in an arid region to investigate the effects of nitrogen form and drip irrigation placement on nitrogen transformation dynamics in rice rhizosphere and yield formation,aiming to address low nitrogen use efficiency in drip-irrigated rice and provide theoretical and technical support for improving nitrogen management in these systems.[Method]A three-factor randomized complete block design was adopted.The experimental factors included nitrogen application methods under drip irrigation,i.e.,surface drip irrigation(Su)and subsurface drip irrigation at a depth of 10 cm(Sh);nitrogen forms,including no nitrogen application(N0),nitrate nitrogen(NN,calcium nitrate),and ammonium nitrogen combined with a nitrification inhibitor(AN,ammonium sulfate+DMPP,where DMPP is a nitrification inhibitor);and rice cultivars,namely Liangxiang 3(LX3)and Ningjing 48(NJ48).The three factors were fully crossed,resulting in 12 treatment combinations with three replicates for each combination.We conducted a comparative analysis of the following parameters across the different treatment combinations:rhizosphere soil pH,NH₄⁺-N and NO₃⁻-N content,nitrification rate and denitrification potential,aboveground nitrogen accumulation,and yield components.[Result]Dry matter accumulation,nitrogen accumulation,and yield differed significantly among the treatment combinations.Overall,the AN treatment outperformed the NN and N0 treatments,with the Sh+AN combination yielding the highest results.The rhizosphere soil pH was significantly lower in the AN treatment than in the NN treatment.At both the tillering and heading stages,the soil NH₄⁺-N content differed significantly among nitrogen forms,with the AN treatment being significantly higher than the N0 and NN treatments.The highest values were observed in the Sh+AN combination(LX3:20.39 mg/kg;NJ48:21.05 mg/kg).Similarly,soil NO₃⁻-N content varied significantly among nitrogen forms,with the NN treatment significantly exceeding the N0 and AN treatments.The Su+NN combination showed the highest levels(LX3:61.71 mg/kg;NJ48:59.97 mg/kg).The soil potential nitrification rate and denitrification potential were significantly higher in the NN treatment than in the N0 and AN treatments.While these rates were slightly higher under Su irrigation compared to Sh,the difference was not statistically significant.[Conclusion]Shallow subsurface drip irrigation at 10 cm depth combined with ammonium nitrogen stabilization management(Sh+AN)better maintained NH₄⁺-N levels in the rice rhizosphere and suppressed nitrification-related nitrogen loss.Consequently,this practice enhanced nitrogen uptake and increased grain yield.Therefore,the Sh+AN strategy can be recommended as an optimized nitrogen and irrigation management practice for drip-irrigated rice in the arid region of Xinjiang,effectively balancing yield enhancement with the mitigation of nitrogen loss.关键词
滴灌水稻/施肥方式/氮肥形态/氮转化/氮素利用率/产量Key words
drip-irrigated rice/irrigation method/nitrogen form/nitrogen transformation/nitrogen use efficiency/yield引用本文复制引用
杨昌南,何子欣,谈亚文,张学智,张业诚,田浩然,危常州,张新疆..滴灌配施不同形态氮肥管理对水稻根际氮转化过程及产量形成的影响[J].中国水稻科学,2026,40(5):632-647,16.基金项目
兵团财政科技计划资助项目(2022ZD054) （2022ZD054）
国家自然科学基金资助项目(32060721). （32060721）
