Effects of Micro-topography on Soil Organic Carbon and Nitrogen Content in Alpine Grassland
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    Abstract:

    [Objective] The study analyzed the variation of soil organic carbon (SOC) and nitrogen (N) content under different micro-topography in alpine grassland area in order to provide a theoretical basis for the reasonable use of grassland in alpine grassland.[Methods] This study selected 7 different kinds of micro-topography in alpine grassland of Tianzhu to measure SOC and N in the land surface(0-30 cm).[Results] With the increase of soil depths, the content of total N and NH4-N decreased at the flat area of valley bottom. The content of soil total N showed a "V" trend and NH4-N decreased in different position of north-facing slopes. In different position of south-facing slopes, the content of soil total N decreased, but soil content of NH4-N showed an increase trend initially and decreased later. With the increase of soil depths, the content of SOC decreased in all micro-topography, while the content of soil hydrolyzable nitrogen decreased in terrace, middle and south-facing slope, middle and north-facing slope micro-topography. The content of hydrolyzable N decreased initially and then increased in bottom and south-facing slope and bottom and north-facing slope micro-topography, while increased initially and then decreased in top and south-facing slope and top and north-facing slope.[Conclusion] The variation of total N, hydrolyzable N and SOC content at different topographic positions was ranked as:bottom slope > top slope > middle slope. The content of NH4-N decreased initially and then increased. In conclusion, the variation in micro-topography impacts the content of SOC and N dramatically.

    Reference
    [1] 程先富,史学正,于东升,等.基于GIS的土壤全氮空间分布估算:以江西省兴国县为例[J].地理研究,2007,26(1):110-116.
    [2] 程先富,史学正.亚热带典型地区土壤全氮和地形、母岩的关系研究:以江西省兴国县为例[J].水土保持学报,2004,18(2):137-139.
    [3] 贺敬滢,张桐艳,李光录.丹江流域土壤全氮空间变异特征及其影响因素:以陕南张地沟小流域为例[J].中国水土保持科学,2012,10(3):81-86.
    [4] 王淑平,周广胜,吕育财,等.中国东北样带(NECT)土壤碳、氮、磷的梯度分布及其与气候因子的关系[J].植物生态学报,2002,26(5):513-517.
    [5] 张金屯.全球气候变化对自然土壤碳、氮循环的影响[J].地理科学,1998,18(5):72-80.
    [6] 白军红,邓伟,张玉霞.内蒙古乌兰泡湿地环带状植被区土壤有机质及全氮空间分异规律[J].湖泊科学,2002,14(2):145-151.
    [7] 熊汉锋,廖勤周,吴庆丰,等.湖北梁子湖湿地土壤养分的分布特征和相关性分析[J].湖泊科学,2005,17(1):93-96.
    [8] 马玉寿,郎百宁,李青云,等.江河源头草地生态环境现状及恢复途径[J].中国草地,1999(6):60-62.
    [9] 杨成德,龙瑞军,陈秀蓉,等.东祁连山高寒草甸土壤微生物量及其与土壤物理因子相关性特征[J].草业学报,2007,16(4):62-68.
    [10] Wang Jun, Fu Bojie, Qiu Yang, et al. Soil nutrients in relation to land use and landscape position in the semi-arid small catchment on the loess plateau in China[J]. Journal of Arid Environments, 2001,48(4):537-550.
    [11] Ovalles F A, Collins M E. Soil-landscape relationships and soil variability in North Central Florida[J]. Soil Science Society of America Journal, 1986,50(2):401-408.
    [12] 高雪松,邓良基,张世熔.不同利用方式与坡位土壤物理性质及养分特征分析[J].水土保持学报,2005,19(2):53-56.
    [13] 赵海霞,李波,刘颖慧,等.皇甫川流域不同尺度景观分异下的土壤性状[J].生态学报,2005,25(8):2010-2018.
    [14] 鲁如坤.土壤农化分析方法[M].北京:中国农业科学出版社,2000.
    [15] 刘世梁,傅伯杰,马克明,等.岷江上游高原植被类型与景观特征对土壤性质的影响[J].应用生态学报,2004,15(1):26-30.
    [16] 何福红,黄明斌,党廷辉.黄土高原沟壑区小流域土壤水分空间分布特征[J].水土保持通报,2002,22(4):6-9.
    [17] Gong X, Brueck H, Giese K M, et al. Slope aspect has effects on productivity and species composition of hilly grassland in the Xilin River Basin, Inner Mongolia, China[J]. Journal of Arid Environments, 2008,72(4):483-493.
    [18] Liu Minxia, MA Jianzu. Feature variations of plant functional traits and environmental factor in south and north facing slope[J]. Research of Soil & Water Conservation, 2013,20(1):102-106.
    [19] 张燕平,赵粉侠,刘秀贤,等.干热河谷印楝生长与立地条件关系[J].林业科学研究,2005,18(1):74-79.
    [20] 薛立,薛晔,吴敏,等.不同坡位火力楠林土壤肥力变化特征[J].水土保持通报,2011,31(6):51-54.
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杨鹏,赵锦梅,雷隆举,徐长林,王正安.微地形对高寒草地土壤有机碳及氮含量的影响[J].水土保持通报英文版,2018,38(3):94-98

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History
  • Received:December 14,2017
  • Revised:January 10,2018
  • Online: July 06,2018