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
Abstract：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.
Keywords：Three Gorges reservoir areahydro-fluctuation beltfloodingTaxodium hybrid ‘ zhongshanshan’preserving rategrowth
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 19-25,52 )