Study on Soil Available Nitrogen Boundaries of Farmland-grassland Mosaic in Agro-pastoral Transition of North China

doi:10.11733/j.issn.1007-0435.2014.06.011

Acta Agrestia Sinica ›› 2014, Vol. 22 ›› Issue (6): 1222-1226.DOI: 10.11733/j.issn.1007-0435.2014.06.011

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Study on Soil Available Nitrogen Boundaries of Farmland-grassland Mosaic in Agro-pastoral Transition of North China

FU Yao^1,2, LIU Li², LIN Chang-cun¹

1. The College of Forestry, Beijing Forestry University, Beijing 100083, China;
2. Chinese Research Academy of Environmental Sciences, Beijing 100012, China

Received:2014-05-08 Revised:2014-08-30 Online:2014-12-15 Published:2014-12-01

华北农牧交错带农田-草地景观土壤速效氮界面研究

傅尧^1,2, 刘利², 林长存¹

1. 北京林业大学林学院, 北京 100083;
2. 中国环境科学研究院, 北京 100012

通讯作者: 林长存
作者简介:傅尧(1973-),男,吉林长春人,博士,高级工程师,主要从事草地恢复生态及景观生态学研究,E-mail: fuyao73@sohu.com
基金资助:
中央高校基本科研业务费专项资金(BLX2012037)资助

Abstract

Abstract:

In order to provide reference to the vegetation restoration of large scale ecological construction in the arid and semi-arid area, the spatial and temporal variability of soil available nitrogen border at the grassland-farmland ecotone were analyzed by the method of a border-and-ecotone detection analysis (BEDA) based on non-linear regression analysis. The study was located in a mosaic of anthropogenic deciduous grasslands and farmland in the agro-pastoral transition of North China from the dry period (May) to rainy period (September) of 2012. The results showed that the minimum DEI towards the grassland interior was 37.5 m in the dry period (May). The maximum DEI of 57.5 m occurred in the rainy period (August). The amount of precipitation affected the simple diffusion process of available nitrogen, which represented the seasonal dynamics of ecological flows between grassland and farmland.

Key words: Agro-pastoral transition, Boundary between grassland and farmland, Depth-of-edge influence, Available nitrogen

摘要：

利用非线性回归的生态界面测试分析法(BEDA),对华北农牧交错带农田-草地景观土壤的速效氮界面在生长季(5-9月)的时空动态进行分析,为干旱、半干旱地区以植被恢复为主的大规模生态环境建设提供参考.结果表明:农田-草地边界的土壤速效氮生态界面位于草地内.在少雨的5月,农田-草地的边界影响域最小,仅为37.5 m;而在雨水较为丰沛的8月,边界影响域最大,为57.5 m.相对于少雨期,丰雨期的速效氮生态界面会更靠近草地内部.速效氮素在农田-草地界面上表现出地表生态流季节动态性.

关键词: 农牧交错带, 农田-草地界面, 界面影响域, 速效氮

CLC Number:

S812-05

FU Yao, LIU Li, LIN Chang-cun. Study on Soil Available Nitrogen Boundaries of Farmland-grassland Mosaic in Agro-pastoral Transition of North China[J]. Acta Agrestia Sinica, 2014, 22(6): 1222-1226.

傅尧, 刘利, 林长存. 华北农牧交错带农田-草地景观土壤速效氮界面研究[J]. 草地学报, 2014, 22(6): 1222-1226.

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Study on Soil Available Nitrogen Boundaries of Farmland-grassland Mosaic in Agro-pastoral Transition of North China

华北农牧交错带农田-草地景观土壤速效氮界面研究

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