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On July 18, 2014, in the northeast of Hainan and Wenchang has been hitted by a super typhoon "Rammasun" caused widespread lodging and fold of landscape tree in city proper. Regarded this lodging Africa neem in Haikou city as the research object, investigated and study analysis the reasons why the Africa neem appeared widespread lodging. due to the construction of artificial facilities, directly or indirectly affected on the normal growth and development of root; Under the effect of heavy rainfall, the strength of the surface soil is reduced, the strength of roots-soil composite system was decreased owning to the effect of softening and lubrication of the water on earth; because of the large crown breadth of African neem, it is extremely easily to withstand huge horizontal load and bending moment at the air-soil interface. According to the exposed problem of Africa neem after disaster, put forward the measure that how to improve the Lodging resistance.

Investigation and Study of the Wind Resistance of Landscape Tree Africa Neem in Haikou City