| 保护性耕作下蚕豆/玉米/甘薯三熟制农田土壤呼吸、碳平衡及经济-环境效益特征 |
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| 引用本文： | 熊瑛,王龙昌,赵琳璐,杜娟,张赛,周泉.保护性耕作下蚕豆/玉米/甘薯三熟制农田土壤呼吸、碳平衡及经济-环境效益特征[J].中国生态农业学报,2018,26(11):1653-1662. |
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| 作者姓名： | 熊瑛 王龙昌 赵琳璐 杜娟 张赛 周泉 |
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| 作者单位： | 西南大学农学与生物科技学院/三峡库区生态环境教育部重点实验室/南方山地农业教育部工程研究中心;河南科技大学农学院 |
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| 基金项目： | 国家自然科学基金项目（31271673）和公益性行业（农业）科研专项（201503127）资助 |
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| 摘 要： | 垄作和秸秆覆盖是实现西南丘陵区旱地农田稳产高产和固碳的适宜保护性耕作模式。为探讨该保护性耕作模式下蚕豆/玉米/甘薯三熟制农田土壤碳排放的特征,对平作无覆盖(T)、垄作无覆盖(R)、平作+秸秆半量覆盖(TS1)、垄作+秸秆半量覆盖(RS1)、平作+秸秆全量覆盖(TS2)、垄作+秸秆全量覆盖(RS2)6种耕作模式下西南紫色土丘陵区蚕豆/玉米/甘薯三熟制农田土壤呼吸、粮食产量特征进行测定,分析农田碳平衡及经济-环境效益,为量化评估农田生态系统碳收支提供理论依据。结果表明:在整个间套作系统内,蚕豆、玉米和甘薯全生育期内土壤呼吸速率均值分别为3.704μmol·m~(-2)·s~(-1)、4.847μmol·m~(-2)·s~(-1)和4.606μmol·m~(-2)·s~(-1),垄作降低了3种作物的农田土壤呼吸速率(P0.05),秸秆覆盖则增加了土壤呼吸(P0.05),垄作和秸秆覆盖配合使用后土壤呼吸总量和微生物呼吸总量增加(P0.05)。保护性耕作促进三熟制农田生态系统内作物固碳;土壤-作物系统碳平衡表现为碳汇,RS2、TS2、RS1、TS1、R分别较T高25.41%、25.37%、9.84%、26.74%、13.26%。与平作相比,垄作和秸秆覆盖提高了粮食产量,以RS2(17 460.45 kg·hm~(-2))最高,TS2(16 498.73 kg·hm~(-2))次之。蚕豆/玉米/甘薯三熟制农田生产每千克籽粒释放CO_2量处理间表现为T(1.88 kg?kg~(-1))TS1(1.83 kg?kg~(-1))R(1.76kg?kg~(-1))TS2(1.75 kg?kg~(-1))RS1(1.69 kg?kg~(-1))RS2(1.68 kg?kg~(-1))。垄作和秸秆覆盖提高了套作的经济-环境效益,秸秆覆盖量越高,经济-环境效益越好。从农田碳平衡和经济-环境效益综合考虑,垄作结合秸秆全量覆盖(RS2)具有最大的碳汇能力和最优的经济-环境效益,可以优先作为该地区农田实现固碳增汇减排的耕作措施。
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| 关 键 词： | 土壤呼吸 碳平衡 碳汇 经济-环境效益 蚕豆/玉米/甘薯三熟制 保护性耕作 |
| 收稿时间： | 2018/2/11 0:00:00 |
| 修稿时间： | 2018/5/18 0:00:00 |
Soil respiration, carbon balance, and economic and environmental benefits of triple intercropping system of fava bean, maize and sweet potato under conservation tillage |
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| XIONG Ying,WANG Longchang,ZHAO Linlu,DU Juan,ZHANG Sai and ZHOU Quan.Soil respiration, carbon balance, and economic and environmental benefits of triple intercropping system of fava bean, maize and sweet potato under conservation tillage[J].Chinese Journal of Eco-Agriculture,2018,26(11):1653-1662. |
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| Authors: | XIONG Ying WANG Longchang ZHAO Linlu DU Juan ZHANG Sai and ZHOU Quan |
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| Institution: | College of Agronomy and Biotechnology, Southwest University/Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education/Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China;College of Agriculture, Henan University of Science and Technology, Luoyang 471003, China,College of Agronomy and Biotechnology, Southwest University/Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education/Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China,College of Agronomy and Biotechnology, Southwest University/Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education/Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China,College of Agronomy and Biotechnology, Southwest University/Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education/Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China,College of Agronomy and Biotechnology, Southwest University/Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education/Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China and College of Agronomy and Biotechnology, Southwest University/Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education/Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China |
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| Abstract: | |
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| Keywords: | Soil respiration Carbon balance Carbon sequestration Economic and environmental benefits Fava bean maize and sweet potato triple intercropping system Conservation tillage |
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