| 秦雨,田雪,杜佳遥,王首翔,李鹏,张翀,巨晓棠.不同施肥措施对海南热带辣椒体系土壤氧化亚氮排放的影响[J].农业环境科学学报,2025,44(10):2685-2697. |
| 不同施肥措施对海南热带辣椒体系土壤氧化亚氮排放的影响 |
| Effects of different fertilization regimes on nitrous oxide emissions from a tropical pepper cropping system in Hainan |
| 投稿时间：2024-12-31 |
| DOI：10.11654/jaes.2024-1170 |
| 中文关键词: 氧化亚氮 辣椒 热带地区 优化施氮 氮素利用率 氮素盈余 |
| 英文关键词: nitrous oxide pepper tropical region optimal nitrogen application nitrogen use efficiency nitrogen surplus |
| 基金项目:国家自然科学基金项目（U24A20625，42207348）；海南大学启动经费（KYQD（ZR）-20098，KYQD（ZR）-21028） |
|
| 摘要点击次数: 1020 |
| 全文下载次数: 565 |
| 中文摘要: |
| 为研究不同施肥措施对海南热带辣椒体系土壤氧化亚氮（N2O）排放特征的影响，设置5种施肥措施：不施氮（N0），农户常规施氮（Ncon），优化施氮（氮肥减量 40%，Nopt），优化施氮配施硝化抑制剂（Nopt+NI），优化施氮配施生物炭（Nopt+B）。在辣椒整个生育期，监测N2O排放、环境因子及土壤因子的动态变化，并在辣椒成熟期测定产量及吸氮量。结果表明：施氮量、土壤温度、水分及硝态氮（NO3--N）含量是影响海南热带辣椒土壤 N2O排放的主要因素。与 Ncon相比，Nopt、Nopt+NI及 Nopt+B 3种优化施肥处理分别减少44%、84%、64%的N2O排放，并显著降低了15%、86%、49%的N2O排放因子和42%、83%、67%的单位产量N2O排放量，对辣椒产量、吸氮量及氮素利用率没有显著影响，但显著降低了44%~50%的土壤氮盈余，其中，添加生物炭处理的效果更好。研究表明，3种优化施肥措施均能在保证作物产量的前提下不同程度地减少N2O排放，综合考虑氮素利用率、氮盈余和固碳等方面，优化施肥配施生物炭的减排效果最佳。 |
| 英文摘要: |
| Studying the emission characteristics and influencing factors of N2O in tropical pepper soil in Hainan through different fertilization modes. The experiment involved five treatments：no nitrogen（N0）, conventional nitrogen application（Ncon）, optimal nitrogen application（nitrogen fertilizer reduction by 40%, Nopt）, optimal nitrogen application combined with a nitrification inhibitor（Nopt + NI）, optimal nitrogen application combined with a biochar（Nopt +B）. During the growth period of peppers, the dynamic of N2O fluxes, climate factors, and soil factors were monitored. Additionally, the yield and nitrogen uptake at the maturity stage of peppers were measured. Correlation analysis showed that nitrogen application rate, soil temperature, moisture, and NO-3-N content were the main factors driving N2O emission. Compared with Ncon, the optimal fertilizations of Nopt, Nopt + NI, and Nopt + B decreased N2O emissions by 44%, 84%, and 64%, respectively, and significantly reduce nitrous oxide emission factor by 15%, 86%, and 49%, as well as yield-scale N2O emissions by 42%, 83%, and 67%, respectively. The three optimal treatments did not compromise pepper yield, nitrogen uptake, or nitrogen use efficiency compared with Ncon. However, they significant reduced soil nitrogen surplus by 44% - 50%. Among the three treatments, the addition of biochar was the most effective in increasing production and reducing nitrogen surplus. Studies have shown, the three optimal fertilization regimes can reduce N2O emissions. Consequently, considering nitrogen use efficiency, nitrogen surplus, and carbon sequestration, optimizing the application of biochar with fertilizers has the best effect on reducing emissions. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
