| 不同耕作方式对稻田净增温潜势和温室气体强度的影响 |
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| 引用本文： | 成臣,曾勇军,杨秀霞,黄山,罗亢,石庆华,潘晓华,商庆银.不同耕作方式对稻田净增温潜势和温室气体强度的影响[J].环境科学学报,2015,35(6):1887-1895. |
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| 作者姓名： | 成臣 曾勇军 杨秀霞 黄山 罗亢 石庆华 潘晓华 商庆银 |
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| 作者单位： | 江西农业大学,双季稻现代化生产协同创新中心/作物生理生态与遗传育种教育部重点实验室/江西省作物生理生态与遗传育种重点实验室,南昌330045 |
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| 基金项目： | 国家科技支撑计划项目(No.2012BAD14B14);江西省教育厅青年科学基金项目(No.GJJ14306);江西省高等学校科技落地计划项目(No.12063) |
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| 摘 要： | 免耕技术近年来在南方稻区被广泛推广应用,但该项技术是否有利于减缓稻田综合温室效应目前并不清楚.因此,本文以双季稻-紫云英为研究对象,利用静态箱-气相色谱法分别研究不同耕作方式对稻田CH4和N2O排放、双季稻产量、土壤固碳、稻田净综合增温潜势(GWP)和温室气体强度(GHGI)的影响.试验处理包括常规翻耕(CT)、旋耕(RT)和免耕(NT).结果表明,稻田周年CH4累积排放量为233.5~404.0kg·hm-2·a-1,NT和RT处理分别比CT增加73.1%和35.1%.晚稻生长季CH4排放量占周年CH4排放量的53.7%~66.5%,其中,晚稻移栽至烤田期间CH4累积排放通量占晚稻季排放总量的77.0%~81.3%.稻田N2O累积排放量为4.00~4.82 kg·hm-2·a-1(以N计),但各处理之间没有显著差异.稻田年固碳量为0.36~1.31 t·hm-2·a-1(以C计),其中,NT处理比CT和RT处理分别增加148.4%和261.0%.双季稻周年产量为15.2~17.1 t·hm-2,耕作方式对产量没有显著影响.稻田净GWP为5095.4~7788 kg·hm-2(以CO2当量计),其中,RT和NT处理分别比CT增加52.8%和32.2%.稻田GHGI为0.30~0.46 kg·kg-1(以每kg粮食产量产生的CO2当量计),其中,RT和NT处理分别显著高于CT处理50.1%和45.3%.综上所述,免耕在短期内会增加稻田温室效应,但可以促进土壤固碳量的显著增加,因此,其固碳减排的长期效应还有待观测.
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| 关 键 词： | 耕作方式 甲烷 氧化亚氮 土壤固碳 增温潜势 温室气体强度 稻田 |
| 收稿时间： | 2014/7/21 0:00:00 |
| 修稿时间： | 2014/8/19 0:00:00 |
Effect of different tillage methods on net global warming potential and greenhouse gas intensity in double rice-cropping systems |
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| CHENG Chen,ZENG Yongjun,YANG Xiuxi,HUANG Shan,LUO Kang,SHI Qinghu,PAN Xiaohua and SHANG Qingyin.Effect of different tillage methods on net global warming potential and greenhouse gas intensity in double rice-cropping systems[J].Acta Scientiae Circumstantiae,2015,35(6):1887-1895. |
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| Authors: | CHENG Chen ZENG Yongjun YANG Xiuxi HUANG Shan LUO Kang SHI Qinghu PAN Xiaohua and SHANG Qingyin |
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| Institution: | Collaborative Innovation Center for the Modernization Production of Double Cropping Rice/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University Nanchang 330045,Collaborative Innovation Center for the Modernization Production of Double Cropping Rice/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University Nanchang 330045,Collaborative Innovation Center for the Modernization Production of Double Cropping Rice/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University Nanchang 330045,Collaborative Innovation Center for the Modernization Production of Double Cropping Rice/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University Nanchang 330045,Collaborative Innovation Center for the Modernization Production of Double Cropping Rice/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University Nanchang 330045,Collaborative Innovation Center for the Modernization Production of Double Cropping Rice/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University Nanchang 330045,Collaborative Innovation Center for the Modernization Production of Double Cropping Rice/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University Nanchang 330045 and Collaborative Innovation Center for the Modernization Production of Double Cropping Rice/Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University Nanchang 330045 |
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| Abstract: | |
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| Keywords: | tillage methods methane nitrous oxide soil carbon sequestration GWP GHGI rice paddy |
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