中国农学通报2025，Vol.41Issue(29)：69-75,7.
秸秆生物炭配施DMPP对农田土壤NH3和N2O排放的影响
Effects of Biochar Combined with DMPP on Soil NH3 and N2O Emission in Vegetable Soil
摘要
Abstract
To explore the effects and mechanisms of biochar and nitrification inhibitors on the emission of main reactive nitrogen gases(NH3 and N2O)in protected vegetable cultivation soil,soil from vegetable greenhouses in Zhejiang was collected,and a pot experiment was conducted using a closed chamber-gas chromatography method to observe the impacts of straw biochar and nitrification inhibitor(DMPP)on soil N2O and NH3 emissions during crop growth.Five treatments were set up for the experiment,including CK(control),urea(N),urea+nitrification inhibitor(N+DMPP),urea+biochar(N+C),and urea+biochar+nitrification inhibitor(N+C+DMPP).The results showed that the cumulative N2O emission of the N treatment was 16.69 mg N/m2,and that of the N+C treatment was 14.73 mg N/m2,indicating that biochar reduced the cumulative N2O loss in vegetable field soil by approximately 11.74%.The cumulative N2O emissions of the N+DMPP,N+C+DMPP,and CK treatments were 8.36,2.82 and 2.58 mg N/m2,respectively,which were significantly lower than those of the N treatment.DMPP inhibited nitrification by suppressing the growth and reproduction of AOB(ammonia-oxidizing bacteria),thereby reducing the cumulative N2O loss from the nitrification process.The cumulative ammonia volatilization in the soil of the N+C treatment was 45.08 kg N/hm2,59.75%higher than that of the N treatment,and the N+C+DMPP treatment was 24.24%higher than the N treatment.There was no significant difference in ammonia volatilization between the single DMPP addition and the N treatment.The number of nosZ genes in the biochar and nitrification inhibitor combined treatment was 80%higher than that in the single application,indicating that the combined application significantly enhanced soil denitrification,which was conducive to the reduction of N2O to N2.Considering the global warming potential(GWP)caused by direct N2O emissions and indirect N2O emissions from ammonia volatilization,the N+C treatment reduced N2O emissions but promoted ammonia volatilization,thereby increasing its GWP.In the protected vegetable cultivation system,compared with single application measures,the combined application of 3,4-dimethylpyrazole phosphate(DMPP)and biochar can more significantly inhibit greenhouse gas emissions during soil nitrogen transformation,showing the best GWP reduction effect during the critical fertilization period,providing an efficient and feasible technical path for achieving green and low-carbon production in protected agriculture.关键词
秸秆/设施蔬菜/硝化抑制剂/温室效应潜能/活性氮Key words
straw/protected vegetables/nitrification inhibitor/greenhouse effect potential/active N分类
农业科技引用本文复制引用
聂新军,潘红艳,汪玉瑛,吕豪豪,黄佳佳,何莉莉..秸秆生物炭配施DMPP对农田土壤NH3和N2O排放的影响[J].中国农学通报,2025,41(29):69-75,7.基金项目
浙江省三农九方科技协作项目"新型秸秆炭基肥固碳增效研究与示范"(2023SNJF040). （2023SNJF040）
