Biomass Productivity of Taiwania flousiana Plantation and Successive Rotation Plantation of Cunninghamia lanceolata in Cutover Forest Land of C. Lanceolata

摘要

cqvip:[Objectives] The aim was to reveal the accumulation characteristics and differences of biomass productivity of Taiwania flousiana plantation and successive rotation plantation of Cunninghamia lanceolata. [Methods]The biomass and productivity of the 23-year-old T. flousiana plantation and successive rotation plantation of C. lanceolata were studied at Nandan Shankou Forestry Farm of Guangxi.,China. [Results]There were differences in the biomass distribution of different organs of T. flousiana plantation and successive rotation plantation of C. lanceolata. The biomass for the T. flousiana plantation was distributed in the order of stem > branch > leaves > bark,and the successive rotation plantations of C. lanceolata was stem > root > branch > bark > leaves. The biomass of tree layer of 23-years-old T. flousiana plantation and successive rotation plantations were 195. 21 and 136. 82 t/hm^2,respectively,including 113. 32 and 87. 91 t/hm^2 of economic biomass( stem). The annual net productivity of tree layer of the 2 plantations were 8. 49 and 5. 95 t/( hm^2·a),respectively,including 5. 14 and 3. 82 t/( hm^2·a) of stem. Therefore,T. flousiana plantation has higher biomass accumulation ability than that of successive rotation plantations of C. lanceolata,and can be used as an excellent substitute tree species for the regeneration of C. lanceolata cutover plantation.[Conclusions]