摘要
为了探究新型栽培方式下甜椒苗期N2O的排放量和排放昼夜变化规律,明确新型栽培方式下最佳的蔬菜减排栽培模式,通过静态箱-气相色谱法分别对土垄栽培、土垄内嵌式基质栽培(SSC)标准垄、SSC矮垄3种栽培模式的内嵌区和整个垄部连续取气测定N2O排放量。结果表明,测定时间段内,设施甜椒苗期的N2O排放通量出现两个排放峰值,呈现昼高夜低的现象。在白天(8:00—16:00),SSC矮垄的垄部N2O的平均排放通量最大,为0.180 mg·m^-2·h^-1,土垄的垄部N2O的平均排放通量最低,为0.112 mg·m^-2·h^-1;在夜间(17:00—22:00),SSC标准垄的垄部N2O的平均排放通量最大,为0.113 mg·m^-2·h^-1,土垄的垄部N2O的平均排放通量最小,为0.064 mg·m^-2·h^-1。3种栽培模式的N2O的昼夜累积排放量无显著差异,与土垄栽培相比,SSC矮垄栽培更有利于甜椒的生长。综上,SSC矮垄栽培有利于设施蔬菜的生长,为设施蔬菜减排增效技术研究提供参考。
In order to explore the N2O emission amount and diurnal variation characteristic of sweet pepper in the new cultivation mode,and identify the optimal cultivation model for reducing N2O emissions of vegetables,the static opaque chamber method was used to continuously determine the N2O emission in embedded and whole ridge of three cultivation modes,including soil ridge,soil-ridged substrate-embedded cultivation(SSC)standard ridges,and SSC dwarf ridges.The results showed that during the measurement period,the N2O emission flux at the seedling stage of sweet pepper presented two emission peaks.The N2O fluxes manifested a high-emission during the day and low-emission at night.In the daytime(8:00—16:00),the N2O flux of the SSC dwarf ridge was the largest,which was 0.180 mg·m^-2·h^-1,while the N2O emissions flux at the ridge of soil row was the smallest,0.112 mg·m^-2·h^-1.At night(17:00—22:00),the emissions flux of the N2O of the SSC standard ridge was the largest,0.113 mg·m^-2·h^-1,the emission flux of the ridge portion of the soil ridge was the smallest,which was 0.064 mg·m^-2·h^-1.There was no significant difference in the cumulative emission of day and night among three cultivation modes.In addition,SSC dwarf ridge cultivation was more beneficial for sweet pepper growth than other cultivation modes.In conclusion,SSC dwarf ridge cultivation was beneficial for the vegetable growth in greenhouse.The present study could provide a reference for the technology research of reducing emissions and increasing efficiency of greenhouse vegetables.
作者
李宝石
刘文科
李宗耕
张玉彬
查凌雁
周成波
邵明杰
LI Baoshi;LIU Wenke;LI Zonggeng;ZHANG Yubin;ZHA Lingyan;ZHOU Chengbo;SHAO Mingjie(Key Laboratory of Energy Conservation and Waste Management of Agricultural Structures,Ministry of Agriculture and Rural Affairs,Institute of Environment and Sustainable Agricultural Development,Chinese Academy of Agricultural Sciences,Beijing 100081,China)
出处
《中国农业科技导报》
CAS
CSCD
北大核心
2021年第2期177-184,共8页
Journal of Agricultural Science and Technology
基金
宁夏回族自治区重点研发计划项目(2017BY085)
国家重点研发计划项目(2016YFD0801001)。
