黄土高原王东沟小流域土壤表层全磷空间变异性
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摘要
[目的]分析黄土高原小流域尺度地貌单元和土地利用方式对全磷空间变异的影响。确定全磷空间变异规律,为土地生产管理提供依据。[方法]2017年在黄土高原王东沟小流域采集了267个土壤样品进行了分析研究。用ArcGIS 10.2绘制样点全磷含量分布图,并分析不同地貌单元和土地利用方式下全磷含量的空间变异特征。[结果]王东沟小流域内不同地貌单元下全磷含量呈现为:塬面>塬坡>沟道的分布规律,不同的土地利用类型下全磷含量呈现为:果园>废弃果园>农地>林地>荒草地的分布规律。土地利用方式和地貌单元对全磷空间变异的影响极为显著。[结论]王东沟小流域土地利用经过14a不断的调整,全磷的含量有了大幅度的提升,土地利用方式显著改变了全磷的空间分布格局。
[Objective]To analyze the effect of geomorphic units and land use on the spatial variation of total phosphorus in a small watershed of the Loess Plateau,in order to provide basis for land management.[Methods]In 2017,267 soil samples were collected in the Wangdonggou watershed.The total phosphorus contents were measured for different geomorphic units and land use types and its spatial distribution was mapped by using ArcGIS 10.2.[Results]The land use patterns and geomorphologic units exhibited an extremely significant effect on the spatial variation of total phosphorus.The content of total phosphorus in different geomorphic units showed as:sorghum> slop> channel.The content of total phosphorus in different land use types showed as:orchards> abandoned orchards> farmland> woodland> wild grassland.[Conclusion]After more than ten years of agricultural intensification,the total phosphorus content has been improved greatly,and the distribution of total phosphorus has been substantially changed by the land use patterns.
[Objective]To analyze the effect of geomorphic units and land use on the spatial variation of total phosphorus in a small watershed of the Loess Plateau,in order to provide basis for land management.[Methods]In 2017,267 soil samples were collected in the Wangdonggou watershed.The total phosphorus contents were measured for different geomorphic units and land use types and its spatial distribution was mapped by using ArcGIS 10.2.[Results]The land use patterns and geomorphologic units exhibited an extremely significant effect on the spatial variation of total phosphorus.The content of total phosphorus in different geomorphic units showed as:sorghum> slop> channel.The content of total phosphorus in different land use types showed as:orchards> abandoned orchards> farmland> woodland> wild grassland.[Conclusion]After more than ten years of agricultural intensification,the total phosphorus content has been improved greatly,and the distribution of total phosphorus has been substantially changed by the land use patterns.
引文
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[12]崔旭辉,郝羽,邱扬.黄土高原大南沟小流域土壤养分空间分异特征[J].北京师范大学学报:自然科学版,2016,52(4):472-478.
[13]李文军,郝明德,牛育华.黄土高原沟壑区王东沟流域农业生态经济系统演变过程[J].水土保持通报,2016,36(1):298-302.
[14]张春霞,郝明德,王旭刚,等.黄土高原沟壑区小流域土壤养分分布特征[J].水土保持研究,2003,10(1):78-80.
[2]潘成忠,上官周平.土壤空间变异性研究评述[J].生态环境,2003,12(3):371-375.
[3]陆景陵.植物营养学[M].北京:中国农业大学出版社,2003:35-47.
[4]彭琳,彭祥林.黄土地区土壤中磷的含量分布、形态转化与磷肥合理施用[J].土壤学报,1989,26(4):344-352.
[5]欧勇胜,张世熔,余琼,等.横断山北部生态脆弱区土壤磷素空间分布特征[J].生态学报,2005,25(10):2776-2781.
[6]谭鑫.青藏高原东缘高寒地区土壤磷素空间分布研究[D].成都:四川师范大学,2009.
[7]王静怡.小流域土壤磷素空间分布特征及流失风险评价[D].北京:首都师范大学,2007.
[8]滕泽琴,李旭东,韩会阁,等.土地利用方式对陇中黄土高原土壤磷组分的影响[J].草业学报,2013,22(2):30-37.
[9]郭胜利,车升国,梁伟,等.小流域土壤磷的积累特征及其环境效应:以黄土高原沟壑区王东沟小流域为例[J].自然资源学报,2009,24(7):1171-1180.
[10]鲍士旦.土壤农化分析[M].北京:中国农业出版社,2000:74-76.
[11]胡江玲,张高.新疆精河流域土壤质量空间分异规律分析[J].干旱区资源与环境,2011,25(6):113-121.
[12]崔旭辉,郝羽,邱扬.黄土高原大南沟小流域土壤养分空间分异特征[J].北京师范大学学报:自然科学版,2016,52(4):472-478.
[13]李文军,郝明德,牛育华.黄土高原沟壑区王东沟流域农业生态经济系统演变过程[J].水土保持通报,2016,36(1):298-302.
[14]张春霞,郝明德,王旭刚,等.黄土高原沟壑区小流域土壤养分分布特征[J].水土保持研究,2003,10(1):78-80.