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《Environmental Science & Technology》 2017-02
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The Effects of Flooding on Growth of Taxodium hybrid ‘Zhongshanshan’ in the Hydro-fluctuation Belt of the Three Gorges Reservoir Area

ZHAO Yang;RAO Liangyi;XU Ziqi;ZHANG Liyou;ZHU Jinzhao;ZHANG Yanting;WANG Jianxiu;WU Xiaohong;YIN Yunlong;College of Soil & Water Conservation,Beijing Forestry University;Engineering Research Center of Forestry Ecological Engineering of Ministry of Education;Kaixian Forestry Bureau,Chongqing;Linsen Water Resistance Taxodium Hybrid ‘Zhongshanshan’ Co.Ltd.fir,Chongqing;Institute of Botany,Jiangsu Province and Chinese Academy of Sciences;  
The preserving rate,tree height,diameter at breast height(DBH),ground diameter,and crown-width of the Taxodium hybrid ‘zhongshanshan'at different elevations after one,three,and six periodic flooding periods were studied,based on located observations on the hydro-fluctuation belt in Wanzhou,Chongqing. Results showed that,after one flood period,the preserving rate of trees at the 166~175 m elevation was 100%;after three flood periods,the preserving rate at the 168~175 m elevation was 100%;after six flood periods,the preserving rate at the 170~175 m elevation was 98%. In general,the tree height,DBH,ground diameter,and crown-width decreased with the reduction of elevation,but on a certain elevation range,the tree height instead increased. At initial stage of flooding,the growth of trees was influenced by flooding;after several flood periods,the effects became insignificant. The preserving rate decreased significantly in water logged zone,but the trees were still in good condition when root exposed. The Taxodium hybrid ‘zhongshanshan'could improve the physical and chemical properties of soil,and protect the hydro-fluctuation belt from water and soil erosion.
【Fund】: 2013中国工程科技中长期发展战略研究项目:三峡库区消落带生物治理技术研究与示范(L1322017)
【CateGory Index】: S791
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