Study on water conservation function of Eucalyptus plantation

Based on analysis of water-holding capacity of stand components and forest soil,the water conservation capacity of different stands type was evaluated.The result showed that there were obvious difference existed in the forests of different stands.The water holding capacity of aboveground part of secondary forest was the best with 30.6 t·hm-2.The Pinus massoniana forest had the highest water holding capacity and the max with 2 166.5 t·hm-2 and 2 290.9 t·hm-2 respectively.The capacity of Eucalypt usurophylla × E.grandis forest,like the native species,toped middle level indicated that they had strong water holding capacity.It could be expected that the water holding capacity of the aboveground part of E.usurophylla × E.grandis forest would increased as the age increased.