Abstract: To reveal the impact of DMPP on yield and emissions of N2O and CO2 in root soil of cucumber cultured by different modes in solar greenhouse, five treatments were set including CK (soil cultivation, without fertilization), SC (soil cultivation, conventional nitrogen fertilizer application), SC+D (soil cultivation, conventional nitrogen fertilizer application with DMPP), SSC (soil-ridged substrate-embedded cultivation, conventional nitrogen fertilizer application), SSC+D (soil-ridged substrate-embedded cultivation, conventional nitrogen application combined with DMPP). The influence of DMPP on N2O and CO2 emissions in the vegetable root zone and yield were analyzed. The results showed that: N fertilizer application significantly increased N2O emissions and yield of cucumber. Compared with SC treatment, the cumulative emissions of N2O and CO2 and the comprehensive warming potential of SSC were reduced by 27.9%, 30.2%, and 30.1%, respectively (P<0.05). Additionally, compared with SC treatment, SC+D treatment significantly reduced the comprehensive warming potential by 27.5%; and compared with SSC treatment, SSC+D treatment significantly reduced the comprehensive warming potential by 29.8%(P<0.05). Compared with CK, SC, SC+D, SSC and SSC+D treatments significantly increased yield by 123.7%, 138.0%, 130.0% and 138.7%, respectively (P<0.05). Last, compared with SC treatment, SSC treatment significantly increased cucumber yield and dry matter of aboveground and root systems, which were 5.1%, 8.4%, and 66.1%, respectively. The above results indicated that soil-ridged substrate-embedded cultivation under DMPP was an optimal cultivation mode.

Key words: solar greenhouse, DMPP, cucumber, nitrogenous fertilizer, root zone gas, soil-ridged substrate-embedded cultivation

摘要： 为了研究根区施用硝化抑制剂（DMPP）对日光温室起垄内嵌式基质栽培与土垄栽培黄瓜产量及根区N2O和CO2排放的影响，设置5个处理:CK（土垄栽培，不施氮肥）、SC（土垄栽培，常规施氮肥）、SC+D（土垄栽培、常规施氮肥配施DMPP）、SSC（起垄内嵌式基质栽培、常规施氮肥）、SSC+D（起垄内嵌式基质栽培、常规施氮肥配施DMPP），分析了DMPP对黄瓜根区N2O和CO2排放的影响机制和对黄瓜产量的综合影响。结果表明：施氮肥显著增加了设施蔬菜地N2O累计排放量和黄瓜总产量。与SC处理相比，SSC处理的N2O累积排放量、CO2累积排放量和全球增温潜势分别减少27.9%、30.2%、30.1%（P<0.05）。SC+D处理显著降低全球增温潜势27.5%（P<0.05）；相比SSC处理，SSC+D处理显著降低全球增温潜势29.8%（P<0.05）。与CK相比，SC、SC+D、SSC和SSC+D处理的黄瓜总产量分别显著提高123.7%、138.0%、130.0%和138.7%。与SC处理相比，SSC处理显著提高了黄瓜产量和地上部、根系的干物质量，分别为5.1%、8.4%、66.1%。综合考虑N2O和CO2累积排放量、全球增温潜势、黄瓜产量，推荐施用DMPP条件下起垄内嵌式基质栽培为较优的管理模式。

关键词: 日光温室, 硝化抑制剂, 黄瓜, 氮肥, 根区气体, 起垄内嵌式基质栽培