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长江经济带坡面土壤保持服务功能时空格局及其变化特征
吴丹1, 邹长新1, 林乃峰1, 曹巍2
1.环境保护部 南京环境科学研究所, 江苏 南京 210042;2.中国科学院地理科学与资源研究所陆地表层格局与模拟院重点实验室, 北京 100101
摘要:
[目的]分析长江经济带2010—2015年坡面土壤保持服务功能的时空格局及其变化特征。[方法]采用修正的通用水土流失方程(RUSLE)分析长江经济带剖面土壤保持服务功能变化。[结果]2010—2015年,长江经济带年均剖面土壤保持量为1.88×1010 t/a,单位面积土壤保持量为91.54 t/(hm2·a)。森林、草地、农田生态系统的单位面积坡面土壤保持量依次为129.09,111.47,40.38 t/(hm2·a)。5 a间,长江经济带坡面土壤保持服务功能总体呈现上升态势。国家级优化开发区、重点开发区、农产品主产区和重点生态功能区的坡面土壤保持服务功能依次增强。[结论]森林、草地、农田生态系统的坡面土壤保持能力依次降低。主体功能区战略的实施对于提升长江经济带生态安全保障能力具有重要意义。
关键词:  土壤保持  RUSLE模型  主体功能区  长江经济带
DOI:10.13961/j.cnki.stbctb.2018.05.023
分类号:S157
基金项目:国家重点研发计划课题“区域生态安全综合评估预警技术与示范”(2017YFC0506606);中央级公益性科研院所基本科研业务专项(GYZX170306)
Temporal and Spatial Variations of Soil Conservation Service Function in Yangtze River Economic Belt
WU Dan1, ZOU Changxin1, LIN Naifeng1, CAO Wei2
1.Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing, Jiangsu 210042, China;2.Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Abstract:
[Objective] The temporal and spatial variations of soil conservation service function of the Yangtze River economic belt from 2010 to 2015 were analyzed.[Methods] The revised universal soil loss equation (RUSLE) was used to analyze the soil conservation service function.[Results] The average amount of annual soil conservation was 1.88×1010 t/a, and the soil holding volume per unit area was 91.54 t/(hm2·a) during the study period. The soil holding volume per unit area of forest, grassland and farmland ecosystem was 129.09, 111.47 and 40.38 t/(hm2·a), respectively. The soil conservation service function of the Yangtze River economic belt showed an upward trend from 2010 to 2015. The service functions of slope soil in the national optimal development zone, key development zones, agricultural production zones and key ecological function zones was enhanced.[Conclusion] Soil conservation capacity of forest, grassland and farmland decreased in sequence. The implementation of major function oriented zoning strategy was significant in improving the ecological security capability of the Yangtze River economic belt.
Key words:  soil conservation  RUSLE model  major function-oriented zones  the Yangtze River economic belt