定西市安家沟流域水土保持生态服务价值对土地利用方式变化的响应  

Response of Soil and Water Conservation Ecosystem Service Value to Land Use Type at Anjiagou Watershed in Dingxi City

作　　者：马海霞 张佰林 张文祥 常军霞 李旭春 Ma Haixia;Zhang Bailin;Zhang Wenxiang;Chang Junxia;Li Xuchun(Institute of Soil and Water Conservation in Dingxi,Dingxi,Gansu 743000,China)

机构地区：[1]定西市水土保持科学研究所,甘肃定西743000

出　　处：《水土保持通报》2023年第4期316-326,共11页Bulletin of Soil and Water Conservation

基　　金：定西市重点技术攻关专项“黄河流域丘陵沟壑区水土保持措施量化研究”(DX2021AZ01)。

摘　　要：[目的]定量评价黄河流域丘陵沟壑区的甘肃省定西市安家沟流域2005—2020年不同土地利用方式的生态系统服务价值情况,分析其时空变化规律,为优化该区土地利用结构以及土地资源的可持续利用提供科学参考。[方法]采用机会成本法和影子工程法,定量分析黄河流域丘陵沟壑区安家沟流域2005—2020年不同土地利用方式的水土保持生态系统服务价值,利用方式包括人工草地、小麦地、沙棘地、油松地、封禁和撂荒地。[结果]①除小麦地之外,安家沟流域水土保持生态服务价值在2005—2020年呈现持续增加的态势;②人工草地水土保持生态服务价值平均为58.2万元/(km^(2)·a),小麦地44.9万元/(km^(2)·a),沙棘地69.9万元/(km^(2)·a),油松地67.3万元/(km^(2)·a),封禁地53.4万元/(km^(2)·a),撂荒地46.8万元/(km^(2)·a),其排列顺序为:沙棘地>油松地>人工草地>封禁>撂荒地>小麦地,且不同土地利用方式间差异显著;③水土保持生态服务价值年均增幅最高的是人工草地,为9.82%,其次是封禁和撂荒地,分别为8.52%和6.84%,最低的是油松林地,为2.12%,而小麦地的水土保持生态服务价值随年限的变化无明显趋势。[结论]水土保持生态服务价值贡献值较高的是沙棘地和油松林地,分别为21%和20%,其次是人工草地,为17%,最低的是小麦地,为13%,封禁地和撂荒地居中,分别为15%和14%。可见,黄河流域丘陵沟壑区治理水土流失问题的关键在于保持和提高林草地的质量。[Objective]The ecosystem service value of different land use types at Anjiagou watershed in Dingxi City,Gansu Province was quantitatively determined in hilly and gully regions of the Yellow River basin from 2005 to 2020,and the temporal and spatial variation patterns were studied in order to provide a scientific reference for optimizing land use structure and sustainable utilization of land resources in this area.[Methods]Soil and water conservation ecosystem service values were quantitatively analyzed by using the opportunity cost and the shadow engineering method in the Anjiagou watershed from 2005 to 2020.Land use types included artificial grassland,wheat fields,sea buckthorn land,Chinese pine land,closed land,and barren land.[Results]①Ecosystem service values continuously increased from 2005 to 2020 for all land use types except for wheat fields.②The average value of soil and water conservation ecosystem service for artificial grassland,wheat fields,sea buckthorn land,Chinese pine land,closed land,and barren land was 5.82×10^(5),4.49×10^(5),6.99×10^(5),6.73×10^(5),5.34×10^(5),and 4.68×10^(5)yuan/(km^(2)·ha)respectively.The order of the rasult was sea buckthorn land>Chinese pine land>artificial grassland>barren land>closed land>wheat fields.However,there were significant differences among different land use types.③The annual growth rate of ecosystem service value increase was greatest for artificial grassland(9.82%),followed by closed land and barren land(8.52%and 6.84%,respectively),and lowest for Chinese pine land(2.12%).However,there was no obvious trend in wheat fields with years.[Conclusion]Sea buckthorn land and Chinese pine land accounted for 21%and 20%,respectively,of the soil and water conservation ecosystem service value,followed by artificial grassland(17%).Wheat fields accounted for the least amount of ecosystem service value(13%).Closed land and barren land had intermediate values(15%and 14%,respectively).Therefore,the key to controlling soil and water loss in hilly and gully regions

关 键 词：土地利用方式 生态服务价值 机会成本法 影子工程 安家沟流域 甘肃省定西市 

分 类 号：X171.1[环境科学与工程—环境科学]