Coppice performance of Eucalyptus urophylla clone U6.

Eucalyptus urophylla clone U6 was one of the most common eucalypt clone planted in Southern China.The results showed that the number of sprout spot,coppice number and height at the age of 2 months fellowed the Weibull distribution,the kurtosis was over 3,higher than normal school,the skewness over 0,as an anisomerous distribution.The number of sprout spot was related with biological features but not related with height and diameter of stumps as it changed with randomicity.Coppice number affected by height and diameter of stumps.The bigger the diameter,the more the coppice number,it showed a linearity relationship.The coppice number increased with the height of stumps when the height was under 16 cm,it would decrease when the height was over 16 cm,it followed a thrice parabola.The coppice height was affected by the height of stumps,it increased when stump height was under 12 cm,then decreased while over 12 cm;The coppice height was negatively related by stump diameter.