| 1991-2010年内蒙古耕地转出时空格局及分布规律 |
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| 引用本文： | 白雪红,闫慧敏,黄河清,胡云峰,匡文慧.1991-2010年内蒙古耕地转出时空格局及分布规律[J].资源科学,2015,37(2):360-369. |
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| 作者姓名： | 白雪红 闫慧敏 黄河清 胡云峰 匡文慧 |
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| 作者单位： | 中国科学院地理科学与资源研究所, 北京100101;中国科学院大学, 北京100049,中国科学院地理科学与资源研究所, 北京100101,中国科学院地理科学与资源研究所, 北京100101,中国科学院地理科学与资源研究所, 北京100101,中国科学院地理科学与资源研究所, 北京100101 |
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| 基金项目： | 科技部国际合作专项项目(编号:2013DFA91700);中国科学院重点部署项目(编号:KSZD-EW-Z-021-02);国家自然科学基金重点项目(编号:41430861)。 |
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| 摘 要： | 受气候、国家生态保护政策以及社会经济发展影响,内蒙古自治区耕地转出还林还草与因农民外出务工弃耕并存。论文由遥感数据获取1991-2010年内蒙古自治区耕地减少时空分布格局,并分析了耕地减少区域的降水和耕地生产力的分布规律,为便于描述用"耕地转出"表示耕地减少,与传统耕地转出为林地概念不同。研究结果表明:11991-2000年,4.91%的耕地转出,其中82.15%、7.34%、7.64%、1.63%和1.22%的耕地转变为草地、林地、未利用地、水域和建筑用地;而2001-2010年耕地面积减少了3.40%,其中62.62%、19.10%、5.40%、3.46%和9.41%的耕地转变为草地、林地、未利用地、水域和建筑用地;21991-2000年和2001-2010年两个时段耕地转出均主要集中在内蒙古自治区北部和中西部,而鄂尔多斯市和包头市在两时段耕地转出面积占耕地总面积比例均较大;3分析耕地转出区降雨量和农田生产力分布特点的结果表明,1991-2000年间在0~250mm降雨量较低区间耕地转出几率较高,在各NPP区间分布较均匀且多集中在低NPP值区域,2001-2010年间在各个降雨量区间耕地转出几率较均匀且偏小,集中分布在(50~150)g C/(m2·a)NPP区间。散点图分析表明1991-2000年耕地转出点多集中在(700~1 200)g C/(m2·a)NPP中高值区域,270~350mm降雨量中值区域,2001-2010年耕地转出点多集中在(10~70)g C/(m2·a)和(400~700)g C/(m2·a)中低值NPP区域,200~340mm降雨量中值区域,总起来说低降雨量和低NPP值区域容易发生耕地转出,但在一些降雨量和NPP值并不低区域,耕地转出情况依旧存在,耕地转出作为一种复杂现象受多因素驱动。
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| 关 键 词： | 内蒙古自治区 耕地转出 遥感 降雨量 NPP数据 |
| 收稿时间： | 9/9/2014 12:00:00 AM |
Spatiotemporal patterns and distribution characteristics of cropland decrease from 1991 to 2010 in Inner Mongolia |
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| BAI Xuehong,YAN Huimin,HUANG Heqing,HU Yunfeng and KUANG Wenhui.Spatiotemporal patterns and distribution characteristics of cropland decrease from 1991 to 2010 in Inner Mongolia[J].Resources Science,2015,37(2):360-369. |
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| Authors: | BAI Xuehong YAN Huimin HUANG Heqing HU Yunfeng and KUANG Wenhui |
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| Institution: | Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;University of Chinese Academy of Sciences, Beijing 100049, China,Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China,Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China,Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China and Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China |
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| Abstract: | Changes in farmland resources are of concern to food production and farmers' livelihoods. Affected by climate, national policies of ecological protection and socioeconomic development, the Grain for Green program, and cropland decrease by farmers are occurring simultaneously. Under this situation, how to achieve the sustainable development of land and farmers'livelihoods locally is a new topic for scientists. This paper analyzed spatiotemporal patterns of cropland decrease over two recent decades in Inner Mongolia to obtain distribution characteristics of rainfall and net primary productivity(NPP)in cropland decrease regions. We found that during 1991-2000, 4.91% of cropland was decreased, and 7.34%, 82.15%, 1.63%, 1.22% and 7.64% of cropland turned into forest land, grassland, water body, building land and unused land, respectively. From 2001 to 2010, 3.40% of cropland was abandoned, and 19.10%, 62.62%, 3.46%, 9.41% and 5.40% of cropland was turned into forest land, grassland, water body, building land and unused land, respectively. Decreased farmland is mainly in the north and midwest of Inner Mongolia during 1991-2000 and 2001-2010, while Erdos City and Baotou City have large farmland decrease ratios during these two periods. Zonal statistics and cropland decrease ratio index show that, during 1991-2000, the cropland decrease ratio mainly focuses on 150~250 mm and 0~150mm rainfall intervals, and evenly distributed in each interval of NPP. From 2001-2010, the cropland decrease ratio evenly distributed in each interval of rainfall, while mainly focused on the(50~150)gC/(m2 · a)NPP interval. A scatter plot shows that during 1991-2000, cropland decrease points mainly focus on(700~1 200)gC/(m2 · a)of NPP scope, and(270~350) mm of rainfall scope. During 2001-2010, cropland decrease points mainly focus on 10~70gC/(m2 · a) and (400~700)gC/(m2 · a) of NPP scope, and 200~340mm of rainfall scope. Above all, cropland decrease easily occurs in low rainfall and low NPP regions, but in some areas with middle and even high rainfall and NPP values, cropland decrease phenomenon exists. Cropland decrease is a complex process that is driven by many factors. |
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| Keywords: | Inner Mongolia cropland decrease remote sensing rainfall NPP data |
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