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Journal of Arid Land  2014, Vol. 6 Issue (3): 352-360    DOI: 10.1007/s40333-013-0224-5
Research Articles     
Influence of vegetation parameters on runoff and sediment characteristics in patterned Artemisia capillaris plots
GuanHua ZHANG1,2,3, GuoBin LIU2,3*, PingCang ZHANG1, Liang YI4
1 Department of Soil and Water Conservation, Changjiang River Scientific Research Institute, Wuhan 430010, China;
2 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China;
3 Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China;
4 Hubei Academy of Environmental Sciences, Wuhan 430072, China
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Abstract  Vegetation patterns are important in the regulation of earth surface hydrological processes in arid and semi-arid areas. Laboratory-simulated rainfall experiments were used at the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Yangling, northwestern China, to quantify the effects of Artemisia capillaris patterns on runoff and soil loss. The quantitative relationships between runoff/sediment yield and vegetation parameters were also thoroughly analyzed using the path analysis method for identifying the reduction mechanism of vegetation on soil erosion. A simulated rainfall intensity of 90 mm/h was applied on a control plot without vegetation (C0) and on the other three different vegetation distribution patterns: a checkerboard pattern (CP), a banded pattern perpendicular to the slope direction (BP), and a single long strip parallel to the slope direction (LP). Each patterned plot received two sets of experiments, i.e. intact plants and roots only, respectively. All treatments had three replicates. The results showed that all the three other different patterns (CP, BP and LP) of A. capillaris could effectively reduce the runoff and sediment yield. Compared with C0, the other three intact plant plots had a 12%–25% less runoff and 58%–92% less sediment. Roots contributed more to sediment reduction (46%–70%), whereas shoots contributed more to runoff reduction (57%–81%). BP and CP exhibited preferable controlling effects on soil erosion compared with LP. Path analysis indicated that root length density and plant number were key parameters influencing runoff rate, while root surface area density and root weight density were central indicators affecting sediment rate. The results indicated that an appropriate increase of sowing density has practical significance in conserving soil and water.

Received: 07 May 2013      Published: 10 June 2014

National Natural Science Foun-dation of China (41301298), the State Key Program of National Natural Science Foundation of China (41030532), and the Spe-cial Fund of Strategic Priority Research Program of Chinese Academy of Sciences (XDA05060300).

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GuanHua ZHANG, GuoBin LIU, PingCang ZHANG, Liang YI. Influence of vegetation parameters on runoff and sediment characteristics in patterned Artemisia capillaris plots. Journal of Arid Land, 2014, 6(3): 352-360.

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