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生态学杂志 ›› 2012, Vol. 31 ›› Issue (09): 2391-2396.

• 研究报告 • 上一篇    下一篇

基于土地利用变化的土壤保持效益时空动态——以黄土高原南部为例

卞鸿雁**,庞奖励,任志远,徐茜   

  1. (陕西师范大学旅游与环境学院,西安 710062)
  • 出版日期:2012-09-10 发布日期:2012-09-10

Effects of land use change on soil conservation value in southern Loess Plateau of Northwest China.

BIAN Hong-yan**, PANG Jiang-li, REN Zhi-yuan, XU Qian   

  1. (College of Tourism and Environment Science, Shaanxi Normal University, Xi'an 710062, China)
  • Online:2012-09-10 Published:2012-09-10

摘要: 土地利用/覆被变化与土壤保持能力存在着强烈的耦合关系。基于3S技术,应用马尔科夫矩阵、美国通用水土流失方程(USLE)、市场价值法、影子工程法、机会成本法,探究1980—2005年黄土高原南部土地利用变化特征并定量测算了不同土地利用方式下土壤保持物质量及其经济效益。结果表明:研究区耕地和建设用地变化显著,1123.80 km2的耕地转为建设用地。1980和2005年黄土高原南部地区的土壤保持总量分别为20.43×10.8和19.94×10.8 t,各地类单位面积土壤保持量排序为建设用地<耕地<未利用地<草地<林地。1980年和2005年区域土壤保持总经济效益分别为674.27亿元、1064.80亿元,林地、草地、耕地在区域土壤保持功能中占主导地位。

关键词: 机载激光雷达, 林窗特征, 中亚热带, 常绿阔叶林

Abstract: Soil conservation capability is closely related to land use/cover change (LUCC). Based on 3S technology and by using Markov matrix, US universal soil loss equation (USLE), contingent valuation method, shadow project method, and opportunity cost method, this paper analyzed the characteristics of LUCC in southern Loess Plateau from 1980 to 2005, and quantitatively estimated the soil conservation capability and its ecological benefits under different land use types. In the study area, cultivated land and construction land changed significantly from 1980 to 2005. During this period, 1123.80 km2 cultivated land in this area was converted to construction land, and the total soil conservation capability was declined from 20.43×10.8 t in 1980 to 19.94×10.8 t in 2005. The soil conservation capability per unit area of different land use types was in the order of construction land < cultivated land < unutilized land < grassland < forestland. In 1980 and 2005, the total soil conservation value in the study area was 674.27 billion Yuan and 1064.80 billion Yuan, respectively, and forestland, grassland, and cultivated land played leading roles in the soil conservation.

Key words: light detection and ranging (LiDAR), gap characteristics, mid-subtropics, evergreen broad-leaved forest.