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| Distribution of soil water and distance of edge influence at different vegetation compound boundary |
| Chao Lumeng1,Wang Jinxin1,Hou Lin1,Zhang Jinsong2 |
| 1.College of Resources and Environment,Northwest A&F University,712100,Yangling,Shaanxi;2.Reseach Institute of Forestry,Chinese Academy of Forestry Science,100091,Beijing: China |
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Abstract Based on the field measurement of soil water by Neutron probe and oven dry method,the dynamics distribution of soil water in horizontal and vertical directions at edge belts were analyzed for two typical vegetation compound boundary:crop plant-fruit tree boundary(Triticum aestivum Linn.-Malus pumila Mill.) and coniferous forest-broadleaf forest boundary(Pinus tabulaeformis Carr.-Robinia pseudoacacia Linn.),and the distance of edge influence were also studied by using moving split-window techniques.The results showed that the soil water content of Triticum aestivum Linn.is higher than Malus pumila Mill.'s,and the soil water content of Robinia pseudoacacia Linn.is higher than Pinus tabulaeformis's.The distance of edge influence of compound boundary to soil water content was mainly affected by root distribution of plant at edge belts,which was variety with the depth in the soil layer.The distance of edge influence to soil water content at soil depth of 0-60 cm,80-120 cm and 140-200 cm were 8 m & 6 m,8 m & 2 m and 4 m & 4 m for Triticum aestivum Linn.-Malus pumila Mill.compound boundary,respectively,and that of 0-80 cm,100-160 cm were 6 m & 8 m,4 m & 6 m for Pinus tabulaeformis Carr.-Robinia pseudoacacia Linn.compound boundary,respectively.
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Received: 15 November 2006
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