中国农业科学 ›› 2026, Vol. 59 ›› Issue (16): 3621-3639.doi: 10.3864/j.issn.0578-1752.2026.16.011

• 土壤肥料·节水灌溉·农业生态环境 • 上一篇    下一篇

减氮控水配施生物炭与硝化抑制剂对设施土壤-番茄体系氮素损失的影响

李津津1,2(), 赵宇晴1,2, 刘芮怡1,2, 吉艳芝1,2,3, 谢建治1,2, 郭艳杰1,2,3(), 张丽娟1,2,3()   

  1. 1 河北农业大学资源与环境科学学院, 河北保定 071001
    2 河北省农田生态环境重点实验室, 河北保定 071001
    3 河北省蔬菜产业协同创新中心, 河北保定 071001
  • 收稿日期:2025-10-25 接受日期:2025-12-19 出版日期:2026-08-16 发布日期:2026-08-17
  • 通信作者:
    郭艳杰,E-mail:
    张丽娟,E-mail:
  • 联系方式: 李津津,E-mail:1248876501@qq.com。
  • 基金资助:
    河北省现代农业产业技术体系蔬菜产业创新团队项目(HBCT2018030206); 河北省重点研发计划项目(21326905D)

Effects of Reduced Nitrogen and Controlled Water Combined with Biochar and Nitrification Inhibitor on Nitrogen Losses in a Facility Soil-Tomato System

LI JinJin1,2(), ZHAO YuQing1,2, LIU RuiYi1,2, JI YanZhi1,2,3, XIE JianZhi1,2, GUO YanJie1,2,3(), ZHANG LiJuan1,2,3()   

  1. 1 College of Resources and Environmental Sciences, Hebei Agricultural University, Baoding 071001, Hebei
    2 Key Laboratory for Farmland Eco-Environment of Hebei Province, Baoding 071001, Hebei
    3 Collaborative Innovation Center for Vegetable Industry of Hebei, Baoding 071001, Hebei
  • Received:2025-10-25 Accepted:2025-12-19 Published:2026-08-16 Online:2026-08-17

摘要:

【目的】 揭示减氮控水条件下配施生物炭与硝化抑制剂双氰胺(DCD)对设施土壤-番茄体系氮素损失的调控效应,为设施蔬菜氮肥高效利用与绿色发展提供依据。【方法】 以设施番茄为研究对象,设置常规滴灌(TD)与控水滴灌(CD)2种灌水方式,在此基础上设不施氮(TDN0、CDN0)、常规施氮(TDN1、CDN1)、减氮(TDN2、CDN2)及减氮配施生物炭与DCD(TDN2+BD、CDN2+BD)共8个处理。采用田间小区试验法,系统监测追肥期内土壤N2O排放与NH3挥发、剖面NO3--N累积分布及番茄氮素吸收利用、产量与品质指标,定量评估生物炭与双氰胺在减氮控水条件下的协同调控效应。【结果】 施氮显著提高了土壤N2O排放和NH3挥发,且排放高峰主要出现在追肥后2—3 d。减氮措施可有效抑制气态氮损失,在此基础上配施生物炭与DCD进一步强化了N2O的减排效应。在NH3挥发方面,生物炭和DCD施用存在一定升高风险,但控水滴灌能够显著缓解这一不利效应。与常规施氮相比,减氮措施可显著降低气态氮总损失量45.7%—56.6%,土壤0—100 cm剖面硝态氮累积减少13.7%—16.2%。在此基础上配施生物炭与硝化抑制剂DCD,气态氮总损失量进一步降低至49.4%—59.0%,硝态氮累积降幅则扩大至27.4%—30.0%,并有效抑制其深层淋溶。2种灌水方式均能增强水氮协同减损效应,但控水滴灌整体优于常规滴灌。CDN2+BD处理的N2O排放和NH3挥发总损失量较CDN1降低30.0%,净损失率由3.3%降至2.5%;同时显著减少硝态氮深层累积,并提高20—40 cm土层NO3--N保持能力(增加27.1%)。此外,生物炭与DCD能将控水滴灌下的氮肥表观利用率提升至28.9%,TDN2+BD和CDN2+BD处理较对应的单一减氮处理(TDN2和CDN2)分别显著提高53.0%和30.2%(P<0.05)。控水滴灌配施生物炭与DCD处理(CDN2+BD)在获得最高产量(115.93 t·hm-2)的同时,还显著提升了果实维生素C(Vc)含量,并促进了可溶性蛋白、可溶性糖及可溶性固形物的积累。【结论】 减氮控水配施生物炭与硝化抑制剂双氰胺可显著协同抑制氮素气态损失与淋溶,改善土壤氮分布,提高氮肥利用效率和番茄品质,是设施蔬菜氮素减量增效的优选技术模式。

关键词: 减氮控水, 生物炭, 硝化抑制剂, 氮素损失调控, 设施番茄

Abstract:

【Objective】 This study aimed to clarify the regulatory effects of the reduced nitrogen combined with controlled water, biochar, and the nitrification inhibitor dicyandiamide (DCD) on nitrogen losses within a facility soil-tomato system, so as to provide a scientific basis for efficient nitrogen use and sustainable green development in facility vegetable production.【Method】 A field plot experiment was conducted using facility tomato as the research object, with two irrigation treatments including traditional drip irrigation (TD) and reduced drip irrigation (CD). Based on this, eight nitrogen treatments were designed, including no nitrogen (TDN0, and CDN0), traditional nitrogen (TDN1, and CDN1), reduced nitrogen (TDN2, and CDN2), and reduced nitrogen combined with biochar and dicyandiamide (DCD) (TDN2+BD, and CDN2+BD). During the topdressing period, soil N2O emission and NH3 volatilization, NO3--N accumulation in the 0-100 cm soil profile, and tomato nitrogen uptake, yield, and fruit quality indicators were systematically monitored to quantitatively evaluate the synergistic regulatory effects of biochar and DCD under reduced nitrogen and controlled water conditions. 【Result】 Nitrogen application significantly increased soil N2O emissions and NH3 volatilization, with peak fluxes occurring 2-3 days after topdressing. Nitrogen reduction effectively suppressed gaseous nitrogen losses, and the combined application of biochar and the nitrification inhibitor DCD further enhanced the mitigation effect on N2O emissions. Although biochar and DCD posed a potential risk of increasing NH3 volatilization, this adverse effect was substantially alleviated by reduced nitrogen and controlled water conditions. Compared with conventional nitrogen application, nitrogen reduction significantly decreased total gaseous nitrogen losses by 45.7%-56.6% and reduced NO3--N accumulation in the 0-100 cm soil profile by 13.7%-16.2%. When biochar and DCD were applied on the basis of nitrogen reduction, total gaseous nitrogen losses further declined by 49.4%-59.0%, while the reduction in NO3--N accumulation expanded to 27.4%-30.0%, with a clear suppression of deep leaching. Both irrigation methods enhanced the synergistic mitigation effects of water nitrogen regulation. However, controlled drip irrigation demonstrated superior performance compared with conventional drip irrigation. Under controlled irrigation, the CDN2+BD treatment reduced total nitrogen losses by 30.0% compared with CDN1, with decreasing the net nitrogen loss rate from 3.3% to 2.5%. This treatment also significantly inhibited deep NO3--N accumulation and increased NO3--N retention in the 20-40 cm soil layer by 27.1%. In addition, biochar and DCD increased the apparent nitrogen use efficiency under controlled irrigation to 28.9%; TDN2+BD and CDN2+BD improved nitrogen use efficiency by 53.0% and 30.2%, respectively, compared with their corresponding nitrogen-reduction treatments (TDN2 and CDN2) (P<0.05). Furthermore, the controlled irrigation with biochar and DCD (CDN2+BD) achieved the highest tomato yield (115.93 t·hm-2), while significantly enhancing fruit vitamin C content and improving soluble protein, soluble sugar, and total soluble solid levels.【Conclusion】 Reduced nitrogen application combined with controlled water, biochar, and the nitrification inhibitor dicyandiamide (DCD) significantly decreased gaseous and leaching nitrogen losses, optimized soil nitrogen distribution, and improved nitrogen use efficiency and tomato quality, representing an optimal technical approach for nitrogen reduction and efficiency enhancement in facility vegetable production.

Key words: reduced nitrogen and controlled water, biochar, nitrification inhibitor, nitrogen losses regulation, facility tomato