华北农学报 ›› 2025, Vol. 40 ›› Issue (3): 104-113. doi: 10.7668/hbnxb.20195489

所属专题: 土壤肥料

• 资源环境·植物保护 • 上一篇    下一篇

烟田地表CO2和N2O日变化对连续绿肥翻压还田的响应

陈雨露1, 王伟宁2, 孙丰1, 王豹祥3, 汪健3, 毕庆文3, 冯宇阳1, 聂晨旭1, 叶协锋1,   

  1. 1 河南农业大学 烟草学院,国家烟草栽培生理生化研究基地,烟草行业烟草栽培重点实验室,河南 郑州 450046
    2 重庆市烟草公司万州分公司,重庆 404100
    3 湖北中烟工业有限责任公司,湖北 武汉 430040
  • 收稿日期:2024-10-10 出版日期:2025-06-28
  • 通讯作者:
    叶协锋(1979—),男,河南平顶山人,教授,博士,硕士生导师,主要从事烟草栽培生理和健康土壤培育研究。
  • 作者简介:

    陈雨露(1999—),女,河南周口人,在读硕士,主要从事健康土壤培育研究。

    陈雨露、王伟宁为同等贡献作者。

  • 基金资助:
    烟草行业烟草栽培重点实验室项目(30800665); 重庆市烟草公司科技项目(B20231NY1304); 国家自然科学基金项目(51609247)

Responses of Diurnal Variation of Surface CO2 and N2O to Continuous Green Manure Incorporation in Tobacco Field

CHEN Yulu1, WANG Weining2, SUN Feng1, WANG Baoxiang3, WANG Jian3, BI Qingwen3, FENG Yuyang1, NIE Chenxu1, YE Xiefeng1,   

  1. 1 College of Tobacco Science,Henan Agricultural University,National Tobacco Cultivation and Physiology and Biochemistry Research Centre,Key Laboratory for Tobacco Cultivation of Tobacco Industry,Zhengzhou 450046,China
    2 Wanzhou Municipal Company of Chongqing Tobacco Company,Chongqing 404100,China
    3 Hubei China Tobacco Industry Co.,Ltd.,Wuhan 430040,China
  • Received:2024-10-10 Published:2025-06-28

摘要:

为探究连续绿肥翻压还田管理模式下,豫中烟田地表二氧化碳(CO2)和氧化亚氮(N2O)通量日变化特征及其影响因素,确定两者最佳采集时间,2021年基于河南农业大学毛庄科教园区长期定位试验,于烟苗移栽后每隔30 d采用静态暗箱-气相色谱法进行24 h连续动态观测,测定施氮磷钾肥(NPK)和氮磷钾+种植并翻压黑麦草(NPKG)处理下烟田CO2和N2O日排放通量。结果表明,豫中烟田土壤为CO2和N2O的排放源,且排放趋势与大气温度变化轨迹相似,昼高夜低,昼、夜排放通量平均值达到显著差异水平。CO2排放通量在移栽后30 d和60 d表现为不明显双峰形态,90 d表现为昼高夜低的单峰态;N2O通量呈现昼高夜低的单峰态。NPKG处理CO2和N2O排放通量总体上显著高于NPK处理,3个典型日CO2排放通量表现为90 d>60 d>30 d,N2O排放通量为60 d>90 d>30 d。观测日内,土壤孔隙含水率(WFPS)和10 cm地温共同影响着CO2和N2O的排放速率,10 cm地温与CO2和N2O日排放通量均呈显著或极显著正相关。一天中9:00,21:00 CO2和N2O排放通量的矫正系数最接近1,且其与日平均排放通量无显著差异。CO2通量与N2O通量呈显著正相关关系,一定范围内,N2O通量随CO2通量增加呈线性态势增加。综上,连续绿肥翻压还田增加了烟田地表CO2和N2O排放通量,9:00,21:00左右为CO2和N2O最佳采集时间。烟草大田生育期3个取样日,NPK处理和NPKG处理地表CO2排放通量均以90 d 最高,60 d次之;N2O排放通量均以 60 d 最高,90 d次之。

关键词: 烟田, CO2, N2O, 日变化, 绿肥翻压还田

Abstract:

In order to explore the diurnal variation characteristics and influencing factors of surface CO2 and N2O emission fluxes in tobacco fields in central Henan under the management mode of continuous green manure incorporation,and to determine the optimal collection time of the two gases,in 2021,based on a long-term experiment in Maozhuang Science and Education Park of Henan Agricultural University,a 24-hour continuous dynamic observation was carried out by static dark box-gas chromatography every 30 days after tobacco seedlings were transplanted.The daily emission fluxes of CO2 and N2O in tobacco fields under nitrogen phosphorus potassium treatment(NPK)and NPK+planting and turning over ryegrass treatment(NPKG)were measured.The results showed that the tobacco field soil in central Henan was the source of CO2 and N2O emissions,and the emission trend was similar to the trajectory of atmospheric temperature change,which was high in day and low in night,and the average emission flux of day and night reached a significant difference level.The CO2 emission flux showed an inconspicuous bimodal pattern at 30 and 60 days after transplanting,and a single peak state of high day and low night at 90 days after transplanting.The N2O flux showed a single peak state of high day and low night.The CO2 and N2O emission fluxes of NPKG treatment were significantly higher than those of NPK treatment.The CO2 emission fluxes of three typical days were 90 d>60 d>30 d,and the N2O emission fluxes were 60 d>90 d>30 d.During the observation days,water-filled porosity of soil(WFPS) and 10 cm soil temperature jointly affected the emission rates of CO2 and N2O,and the 10 cm soil temperature was significantly or extremely significantly positively correlated with the daily emission fluxes of CO2 and N2O.The correction coefficients of daily CO2 and N2O emission fluxes at 9:00 and 21:00 were the closest to 1,and there was no significant difference compared with the daily average emission flux.There was a significant positive correlation between CO2 flux and N2O flux.Within a certain range,the N2O flux increased linearly with the increase of CO2 flux.In summary,continuous green manure returning increased the surface CO2 and N2O emission flux of tobacco field,and the best collection time of CO2 and N2O was around 9:00 and 21:00.During the three sampling days of tobacco growth period,the surface CO2 emission flux of NPK treatment and NPKG treatment was the highest at 90 days after transplanting,followed by 60 days.The N2O emission flux was the highest at 60 days after transplanting,followed by 90 days.

Key words: Tobacco field, CO2, N2O, Diurnal variation, Green manure returning to the field

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引用本文

陈雨露, 王伟宁, 孙丰, 王豹祥, 汪健, 毕庆文, 冯宇阳, 聂晨旭, 叶协锋. 烟田地表CO2和N2O日变化对连续绿肥翻压还田的响应[J]. 华北农学报, 2025, 40(3): 104-113. doi: 10.7668/hbnxb.20195489.

CHEN Yulu, WANG Weining, SUN Feng, WANG Baoxiang, WANG Jian, BI Qingwen, FENG Yuyang, NIE Chenxu, YE Xiefeng. Responses of Diurnal Variation of Surface CO2 and N2O to Continuous Green Manure Incorporation in Tobacco Field[J]. Acta Agriculturae Boreali-Sinica, 2025, 40(3): 104-113. doi: 10.7668/hbnxb.20195489.