PDF Download

[1]CAO Hui,BU Chong-feng,ZHANG Xing-chang.Sand-Profile Physical and Chemical Properties of Mu Us Sandland and Climate Instructions[J].Research of Soil and Water Conservation,2010,17(03):69-72,272.

Copy

Sand-Profile Physical and Chemical Properties of Mu Us Sandland and Climate Instructions

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 03 Page number: 69-72,272 Column: Public date: 2010-06-20

Title:: Sand-Profile Physical and Chemical Properties of Mu Us Sandland and Climate Instructions

Author(s):: CAO Hui¹, BU Chong-feng^2,3, ZHANG Xing-chang^2,3; 1. Northwest Research Institute of Chemical Industry, Lintong, Shaanxi 710600, China;
2. Northwest A&F University, Yangling, Shaanxi 712100, China;
3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: Mu Us Sand Land; profile; lakes; vegetation; changes

CLC:: S153;P461.4

DOI:: -

Abstract:: Through collecting soil samples distributing on the periphery and the dry lakebed of the desert lakes, soil mechanical composition, organic carbon and total nitrogen content on the 50 cm sample profile were measured. The comparability between two points shows: ① soil sediment changed from bottom to up: light-colored sand→deep (brown) colored peat layer→light-colored sand→deep (brown) colored peat layer; the organic carbon and the content of nitrogen were very low with much soil coarse particles in light-colored sand layer, which indicated vegetation was scarce and the climate was arid during the period, the desert lakes disappeared or shrunk with the increasing desertification. On the contrary, the content of clay and silt in the dark-colored peat layer increased significantly, organic carbon, total nitrogen was high, which indicated the climate was warm and humid with much precipitation, desert lakes expanded, rich vegetation and high soil biological activity conducted to nutrient accumulation. Finally, the sandy environment was improved. ② the significant positive correlation between sticky silt and soil organic carbon and nitrogen was found, C/N ratio was decreasing with the desertification process, the attenuation of soil organic carbon was more significantly than total nitrogen did. Reversely, the coarse sand and soil organic carbon, nitrogen showed the negative correlation.

References:: [1] 万勤琴.呼伦贝尔沙地沙漠化成因及植被演替规律的研究[D].北京.北京林业大学, 2008.
[2] 张仁健, 周家茂, 曹军骥.中国沙漠化及其防治[J].中国粉体技术, 2007 (1):1-5.
[3] 任仓钰.毛乌素沙地沙漠化原因探讨[J].地质灾害与环境保护, 2002, 13 (2):30-31.
[4] 史作民, 刘世荣, 程瑞梅.内蒙古鄂尔多斯地区四个植物群落类型的土壤碳氮特征[J].林业科学, 2004, 40 (2):21-27.
[5] Burke I C, Reiners W A, Schimel D S. Organic matter turnover in a sagebrush steppe landscape[J]. Biogeochemistry, 1989, 7:11-31.
[6] Chen J, Stark J M. Plant species effects and carbon and nitrogen cycling in a sagebrush-crested wheatgrass soil[J]. Soil Biology and Biochemistry, 2000, 32:47-57.
[7] Gomah A H M, Nahid I, Amer H A. Nitrogen mineralization in sludge damended desert soil as affected by rate of sludge, salinity and wetting and drying cycles[J]. Arid Soil Research and Rehabilitation, 1989, 3:417-429.
[8] 鲍士旦.土壤农化分析[M].北京:中国农业出版社, 2007.
[9] 汪勇, 羊向东, 沈吉, 等.陕西红碱淖近百年来环境变化的湖泊沉积记录[J].湖泊科学, 2004, 16 (2):105-112.
[10] 汪勇, 沈洁, 羊向东, 等.陕北红碱淖沉积物粒度特征所揭示的环境变化[J].沉积学报, 2006, 24 (3):349-355.
[11] 鲁瑞洁, 夏虹, 强明瑞, 等.近130 a来毛乌素沙漠北部泊江海子湖泊沉积记录的气候环境变化[J].中国沙漠, 2008, 28 (1):44-49.

Similar References:

Memo

Last Update: 1900-01-01