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采用水稻盆栽试验,研究高温条件下一次性浅层基施含硝化抑制剂3,4-二甲基吡唑磷酸盐(3,4-dimethylpyrazole phosphate,DMPP)氮肥对热带地区典型红壤稻田田面水氮素转化的影响。结果表明,在水稻移栽后第1~30天中,DMPP氮肥处理田面水铵态氮浓度比普通氮肥处理显著增加23.93%~84.08%,硝态氮和亚硝态氮浓度分别显著降低12.57%~91.23%和7.35%~91.15%,总无机氮浓度显著增加7.79%~65.98%。高温热带地区红壤稻田一次性浅层基施硝化抑制剂DMPP不能减轻氮素向水体迁移的风险,其合理的施用方法有待进一步探讨。
A pot experiment was carried out to study the effect of one-off shallow substrate nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) under high temperature on the surface water and nitrogen The impact of prime conversion. The results showed that the concentrations of ammonium nitrogen in the surface water of DMPP nitrogen fertilizer increased significantly by 23.93% -84.08% and the nitrate nitrogen and nitrite nitrogen levels decreased by 12.57% ~ 91.23% and 7.35% ~ 91.15%, respectively. The total inorganic nitrogen concentration increased significantly from 7.79% to 65.98%. DMPP, a one-off shallow basement nitrification inhibitor, in red soil paddy fields in high-temperature tropical regions can not reduce the risk of nitrogen migration to water bodies. The rational application of this method needs to be further explored.