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[1]LIU Shujuan,LIU Shizeng,YUAN Hongbo,et al.Effect of Water Formation on the Vegetation and Soil Particle Fractal Dimension in Qingtu Lake in the Tail-Stream of Shiyang River[J].Research of Soil and Water Conservation,2015,22(06):83-88.

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Effect of Water Formation on the Vegetation and Soil Particle Fractal Dimension in Qingtu Lake in the Tail-Stream of Shiyang River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 06 Page number: 83-88 Column: Public date: 2015-12-28

Title:: Effect of Water Formation on the Vegetation and Soil Particle Fractal Dimension in Qingtu Lake in the Tail-Stream of Shiyang River

Author(s):: LIU Shujuan, LIU Shizeng, YUAN Hongbo, MA Jianping, LI Faming, GUO Shujiang, LI Jingjing; Gansu Key Laboratory of Desertification Combating, Gansu Minqin National Studies Station for Desert Steppe Ecosystem, Lanzhou 730070, China

Keywords:: soil fractal dimension; Qingtu Lake; water formation; plant diversity

CLC:: S714.2

DOI:: -

Abstract:: Soil and vegetation in water formation in the Tail-streams of Shiyang River—Qingtu Lake were selected as the research object. The plant diversity and soil particle sizes in 0—60 cm soil layers which are 0~450 m away from the water body were analyzed. Using fractal geometry method, fractal characteristics of soil particles were analyzed for the purpose of investigating the relationship between the soil particle fractal dimension and vegetation character. The results showed that in different soil layers and different distances from water body, the fractal dimension ranged from 2.105 7 to 2.918 5, with the average of 2.548; fractal dimension of 0—20 cm soil layer presented slowly increasing trend in the distance range of 0~150 m and reached the maximum at the distance of 150 m, and then decreased; and it showed the slow upward trend in 20—40 cm, 40—60 cm soil layer, and reached a maximum at the distance of 100 m; the trends of the diversity index, evenness and dominance were consistent with the change of distance form the water body; they increased in the 0～50 m away from the water body; the diversity index was the highest in the distance od 400～450 m. The value of the important index of the herb reached the maximum at the distance of 200 m away from the water; the important value of shrub reached a maximum at the distance of about 300 m away from the water body. Linear regression analysis showed that in the 0—20 cm and 40—60 cm soil layers, the fractal dimension, diversity index, evenness and dominance showed the significant negative correlation.

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