| 鄱阳湖生态经济区农作物生产碳效率的时空变化 |
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| 引用本文： | 黄景裕,尧 波,胡启武,聂兰琴,付 姗.鄱阳湖生态经济区农作物生产碳效率的时空变化[J].中国生态农业学报,2014,22(10):1231-1239. |
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| 作者姓名： | 黄景裕 尧 波 胡启武 聂兰琴 付 姗 |
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| 作者单位： | 1. 江西师范大学地理与环境学院 南昌 330022
2. 江西师范大学科学技术学院 南昌 330022 |
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| 基金项目： | 中国清洁发展机制基金"江西省应对气候变化十三五目标及工作思路研究"项目与国家自然科学基金项目(31270522)资助 |
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| 摘 要： | 提高农作物生产的碳效率是实现低碳农业的重要途径之一,对我国应对气候变化、实现减排目标有着重要的意义。本研究基于鄱阳湖生态经济区主要农作物生产过程中的碳投入量和产出量,对鄱阳湖生态经济区县域农业碳效率进行了估算,分析了研究区农作物生产碳效率的时空变化。结果表明:(1)鄱阳湖生态经济区农作物碳的生产效率从2000年的9.27 kg·kg-1(CE)增长到2010年的10.16 kg·kg-1(CE),经济效率由2000年的10.73 Yuan·kg-1(CE)下降到2010年的9.25 Yuan·kg-1(CE),生态效率从2000年的1.76 kg(C)·kg-1(CE)上升至2010年的1.94 kg(C)·kg-1(CE);(2)鄱阳湖生态经济区农作物碳效率的空间分布呈现较为明显的集聚特征,主要年份高效率区大都集中于该区的东南部地区,低效率区主要集中在九江地区各县(市);(3)在碳投入一定的情况下,农作物碳的生产效率受农业发展水平和农作物经济产量的影响,经济效率受粮食产量和价格的影响,生态效率则主要受农业碳产出的影响。(4)鄱阳湖生态经济区大部分县(市)为碳汇区,且高碳汇区逐年增多。
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| 关 键 词： | 鄱阳湖生态经济区 碳投入 碳效率 农作物 低碳农业 |
| 收稿时间： | 2014/3/20 0:00:00 |
| 修稿时间： | 8/5/2014 12:00:00 AM |
Spatio-temporal variations in carbon efficiency of crops in Poyang Lake Eco-Economic Region |
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| HUANG Jingyu,YAO Bo,HU Qiwu,NIE Lanqin and FU Shan.Spatio-temporal variations in carbon efficiency of crops in Poyang Lake Eco-Economic Region[J].Chinese Journal of Eco-Agriculture,2014,22(10):1231-1239. |
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| Authors: | HUANG Jingyu YAO Bo HU Qiwu NIE Lanqin and FU Shan |
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| Institution: | School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China;School of Science and Technology, Jiangxi Normal University, Nanchang 330022, China;School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China;School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China;School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China |
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| Abstract: | Agricultural productions are very sensitive to climate change. Controlling agricultural greenhouse gases emissions is not only a key issue in China's efforts to address global climate change, but also an essential part of the country's drive to accelerate the shift in its agricultural development modes. For agriculture, crops and soils have substantial carbon sequestration potential. However, agricultural production has induced large amounts of carbon emissions due to the usage of chemical fertilizers, pesticides, machineries and other agricultural materials. Hence, developing low-carbon agriculture has largely depended on increasing carbon efficiency of crop production. Previous studies on carbon efficiency of agricultural production had concentrated on the effects of agricultural management and planting structure on carbon efficiency. However, studies on the spatial and temporal variations in regional agricultural carbon efficiency had remained extremely unavailable, especially the underlying driving factors. As the main grain production base in Jiangxi Province, Poyang Lake Eco-Economic Region has been promoted as a national strategy in 2009. In this study, carbon input and output data of major crop productions in Poyang Lake Eco-Economic Region were obtained from Jiangxi statistical yearbooks for 2001-2011. Subsequently, carbon production efficiency, carbon economic efficiency and carbon ecological efficiency of crops were calculated at county scale. The objectives of this study were (1) to clarify the spatial and temporal patterns of carbon efficiencies of various crops in Poyang Lake Eco-Economic Region, and (2) to discuss the underlying driving factors of the spatial-temporal variations. Results showed that carbon production efficiency of crops varied from 9.27 to 10.16 kg·kg-1(CE) during 2000-2010. The variation pattern could be separated into three phase as "decline phase (2000-2003), smooth phase (2004-2007) and increasing phase (2008-2010)". Carbon economic efficiency of crops fluctuated but followed a downward trend with a range of 10.73 to 9.25 Yuan·kg-1(CE) in 2000-2010. Carbon ecological efficiency of crops ranged from 1.76 to 1.94 kg(C)·kg-1(CE) in 2000- 2010. This was further divided into three phases as continuous declining phase (2000-2003), smooth development phase (2004-2007) and continuous growth phase (2008-2010). Furthermore, carbon efficiency of crops showed a significantly characteristic spatial concentration in Poyang Lake Eco-Economic Region; where high carbon efficiency zones were mainly concentrated in the southeast of the region for most of the years. However, low carbon efficiency zones were mainly concentrated in the counties around Jiujiang City. In the case of stable carbon input, carbon production efficiency of crops was mainly influenced by the level of agricultural development and crop yield. Carbon economic efficiency was mostly controlled by grain production and pricing system. The ecological efficiency of carbon was mainly driven by agricultural carbon output. Most counties in Poyang Lake Eco-Economic Region were agricultural carbon-sinks, which needed to be maintained by sustainable low-carbon agricultural developments. |
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| Keywords: | Poyang Lake Eco-Economic Region Carbon input Carbon efficiency Crop Low-carbon agriculture |
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