| 华北平原夏玉米不同施氮措施的综合增温潜势研究 |
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| 引用本文： | 和骅芸,胡琦,李子怡,任思琪,马雪晴,潘学标.华北平原夏玉米不同施氮措施的综合增温潜势研究[J].中国农业大学学报,2023,28(6):73-87. |
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| 作者姓名： | 和骅芸 胡琦 李子怡 任思琪 马雪晴 潘学标 |
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| 作者单位： | 中国农业大学 资源与环境学院, 北京 100193; 中国气象局-中国农业大学农业应对气候变化联合实验室, 北京 100193 |
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| 基金项目： | 国家重点研发计划项目(2017YFD0300304-1)；河南省农业气象保障与应用技术重点开放实验室开放研究基金(AMF201905) |
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| 摘 要： | 为探究和利用高固碳、低排放的农业管理措施，以华北平原夏玉米生产为研究对象，采用大田试验和生命周期评价方法，设置对照(CK)、低氮肥(LF)、适宜氮肥(SU)、减排(适宜氮肥+抑制剂，ER)以及高氮肥(HF)5种施氮处理，定量评估夏玉米生产全过程中的土壤排放温室气体增温潜势(GWPSoil)、农业投入增温潜势(GWPIndirect)、净初级生产力增温潜势(GWPNPP)、净综合增温潜势(Net GWP)和农田经济效益。结果表明:不同处理总排放增温潜势(GWPSoil+GWPIndirect)为10 831.3~14 301.9 kg/hm2(以CO2当量计)，由高到低依次为HF>SU>LF>ER>CK；HF的GWPSoil及GWPIndirect均为最高，较CK处理分别高10.9%和153.3%；GWPSoil对总排放量的贡献较大(>70%)，农业投入中肥料对GWPIndirect的贡献最大，为54.1%~69.7%(CK除外)，灌溉次之；华北平原夏玉米农田Net GWP为负值，是大气的碳汇，SU和ER处理Net GWP最大，绝对值分别较CK处理高 18.1% 和17.9%。综上，ER和SU处理净利润最高，属于高收益-高固碳种植管理模式，但ER与SU处理相比，ER的GWPSoil降低了8.7%，更有利于温室气体减排，适合作为绿色农业发展模式在华北平原推广。
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| 关 键 词： | 华北平原 夏玉米 温室气体 生命周期 综合增温潜势 |
| 收稿时间： | 2022/11/9 0:00:00 |
Study on the global warming potential of summer maize under different nitrogen application rates in North China Plain |
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| HE Huayun,HU Qi,LI Ziyi,REN Siqi,MA Xueqing,PAN Xuebiao.Study on the global warming potential of summer maize under different nitrogen application rates in North China Plain[J].Journal of China Agricultural University,2023,28(6):73-87. |
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| Authors: | HE Huayun HU Qi LI Ziyi REN Siqi MA Xueqing PAN Xuebiao |
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| Institution: | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; China Meteorological Administration-China Agricultural University Joint Laboratory of Agriculture Addressing Climate Change, Beijing 100193, China |
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| Abstract: | In order to explore and utilize agricultural management measures with high carbon sequestration and low emissions, summer maize production in the North China Plain was taken as the research object. Based on field experiments and life cycle assessment methods, five nitrogen application treatments including control check(CK), low nitrogen fertilization(LF), suitable fertilizer utilization(SU), emission reduction(suitable nitrogen with inhibitor, ER)and high nitrogen fertilizer(HF)were conducted to quantitatively evaluate the warming potentials of soil greenhouse gas emissions, agricultural inputs(GWPIndirect), and net primary productivity(GWPNPP). The net comprehensive warming potential(Net GWP)and the economic benefits in the whole process of summer maize production were also investigated. The results showed that: The total warming potential(GWPSoil+GWPIndirect)of emissions ranged from 10 831. 3 to 14 301. 9 kg/hm2(measured in CO2 equivalent)under different treatments, with HF>SU>LF>ER>CK in descending order. The GWPSoil and GWPIndirect of HF were the highest, 10. 9% and 153. 3% higher than those of CK, respectively. GWPSoil made major contributions to the total emissions(>70%), while fertilizer contributed the most to GWPIndirect in agricultural inputs, accounting for 54. 1% to 69. 7%(except CK), followed by irrigation. The Net GWP of summer maize farmland in North China Plain was negative, which was the carbon sink of the atmosphere. SU and ER treatments had the largest Net GWP, which was 18. 1% and 17. 9% higher than CK treatment, respectively. To sum up, the net profits of ER and SU treatments were the highest and these two treatments belonged to the high yield-high Net GWP planting management mode. However, the GWPSoil value of ER reduced by 8. 7% compared with SU treatment. Therefore, ER treatment was more conducive to realize greenhouse gas emission reduction and suitable to be promoted as a green agricultural development mode in the North China Plain. |
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| Keywords: | North China Plain summer maize greenhouse gases life cycle global warming potential |
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