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| Influences of water harvesting with subsoiling on the growth of <i>Caragana korshinskii</i> Kom. in the arid grassland |
| Li Xin1,2,Jiang Peifu3,Wu Yang1,Sun Shuyun3,Lei Tingwu1,4,Yuan Jianping3,Zhang Xiao5 |
| 1.Key Laboratory of Modern Precision Agriculture System Integration Research,College of Hydraulic and Civil Engineering,100083,Beijing;2.Bureau of Water Conservancy of Changping Borough,102200,Beijing;3.Bureau of Comprehensive Development,Ministry of Water Resources,100053,Beijing;4.State Key Laboratory of Soil Erosion and Dry land Farming on the Loess Plateau,Institute of Soil and Water Conservation,712100,Yangling,Shaanxi;5.Bureau of Water Conservancy of Inner Mongolia Autonomous Region,011800,Siziwang County,Inner Mongolia: China |
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Abstract In order to solve the problem about the inefficiency of rainwater utilization in the pasturing area of North China,a field experiment was conducted for subsoiling in the Caragana korshinskii Kom.field to form the linear channel to increase the rain water use efficiency;and lopping for Caragana korshinskii Kom.in dry season to decrease the ET.The results indicated that the bulk density of soil had decreased after subsoiling,the average decrease was 0.21 g/cm3.Compared with no-subsoiling treatment,the height and breadth of Caragana korshinskii Kom.was improved 45.54% and 30.71% each;the rainwater use efficiency was increased too.The Caragana korshinskii kom.that was lopped grew faster than the contrast treatment,the height was enhanced 31.15% and breadth was enhanced 32.32%.The Caragana korshinskii Kom.'s height and breadth were close between the two treatments by the end of experiments.The result provided some references for grassland to improve the environment.
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Received: 11 May 2007
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