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| Fractal characteristics of Tilia tomentosa's root system under different water conditions |
| Chen Jihu1,Yu Xinxiao1,You Xiangliang1,2,Liu Ping1,Zhang Changda3,Xie Gang4 |
| 1.Beijing Forestry University,Key Laboratory of Soil and Water Conservation and Combating Desertification,Ministry of Education,100083 Beijing;2.Sci-Tech College of Shandong Agriculture University,271000,Tai'an,Shandong;3.Shandong Surveying and Designing Institute,250013,Jinan;4.Guangrao Forestry Bureau,257300,Guangrao,Shandong: China |
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Abstract Fractal theory was used to investigate the configuration characteristic and physiological function of root system.Fractal dimension(FD),root system abundance and root system length of Tilia tomentosa seedlings potted four-year-old were studied under different water levels.The results showed that the value of FD in waterlogged treatment was the smallest in all treatments.The value of FD decreased under drought stress,and which increased when root system was drought at beginning and then watering.With the enhancement of drought stress intensity,the root system abundance of Tilia tomentosa was decreasing,but the differences among different treatments were not significant.The root system length was also decreasing but the differences among different treatments were significant.The changes of root system vigor under different water conditions were studied,and the correlation of root system vigor with fractal dimension(FD),root system abundance and root system length was analyzed.The results indicated that the root system vigor was strongly positive relation to those indices.
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Received: 28 June 2005
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