乡村人口迁出对生态脆弱地区植被覆被的影响——以内蒙古自治区为例

doi:10.11821/dlxb201510007

Abstract

Abstract:

Improving the quality of environment in ecologically fragile areas had been paid much attention by scholars and government at different levels. Over the past decade, a large number of rural labors had migrated into urban areas. To what extent would the migration affect the changes of vegetation cover in ecologically fragile areas? In this study, we analyzed the spatio-temporal variation of vegetation cover and its relationship with human activities at the county level based on the NDVI data with a resolution of 1 km, meteorological data and economic data from 2000 to 2010 in Inner Mongolia. The major methods included trend line analysis method, significance testing and multi-regression analysis method. The main conclusions were as follows: (1) The vegetation cover of the study area increased by 10.1% during 2000-2010. More than 28% of the vegetation cover increased significantly, and only about 2% decreased evidently during the study period. (2) The area with significant degradation presented a banded distribution in the northern fringe of farming-pastoral ecotone in the central part of Inner Mongolia. It is shown that the ecological environment is still fragile in this area, which should be focused on. The area where vegetation cover significantly improved showed a concentrated distribution in the southeast and west of Inner Mongolia. (3) Effects of agricultural labor on vegetation cover had exceeded those of natural factors such as climate. The emigration of agricultural labor had improved vegetation cover significantly.

Key words: rural-urban migration, agricultural labor, vegetation cover, NDVI, Inner Mongolia

Shiji LI, Xiubin LI, Minghong TAN. Impacts of rural-urban migration on vegetation cover in ecologically fragile areas: Taking Inner Mongolia as a case[J].Acta Geographica Sinica, 2015, 70(10): 1622-1631.

Figures/Tables 6

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类别	因素	解释	变量
自然因素	年降水量年均温	2000-2010年降水量的变化趋势,由公式(1)计算得到 2000-2010年均温的变化趋势,由公式(1)计算得到	Slope降水 Slope均温
人类活动因素	农业劳动力劳动力平均年龄劳均耕地规模	农村农业劳动力10年间的变化率农村劳动年龄人口平均年龄10年间的变化率农业劳动力人均拥有耕地数量10年间的变化率	农业劳动力变率劳均年龄变率劳均耕地规模变率
人类活动因素	劳均饲养牲畜头数	农业劳动力人均饲养牲畜头数10年间的变化率	劳均饲养牲畜变率

模型	非标准化系数		标准化系数	t检验	Sig.	共线性统计量
模型	系数项		标准化系数	t检验	标准误差	容差	方差膨胀因子
1 Adjusted R²: 0.263
(常量)	0.006	0.002		2.735	0.008
Slope降水	0.002	0.001	0.359	2.545	0.014^**	0.629	1.590
Slope均温	-0.343	0.169	-0.273	-2.028	0.048^**	0.687	1.455
农业劳动力变率	-0.010	0.003	-0.447	-3.134	0.003^***	0.613	1.631
劳均年龄变率	-0.031	0.019	-0.192	-1.660	0.103	0.930	1.075
劳均耕地规模变率	-0.002	0.001	-0.265	-2.151	0.036^**	0.824	1.214
劳均饲养牲畜变率	0.000	0.001	0.112	0.904	0.370	0.813	1.230

Impacts of rural-urban migration on vegetation cover in ecologically fragile areas: Taking Inner Mongolia as a case

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