[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...[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]展开更多
The 23-year-old T. flousiana plantation and successive rotation plantation of C. lanceolata at Shankou Forest Farm of Nandan County, Guangxi were tested by the method of plot investigation combining with biomass m...The 23-year-old T. flousiana plantation and successive rotation plantation of C. lanceolata at Shankou Forest Farm of Nandan County, Guangxi were tested by the method of plot investigation combining with biomass measurement. Carbon storage and spatial distribution of different components in the two forests were analyzed. The results indicated that carbon content in different organs of T. flousiana ranged from 426.0 to 503.9 g/kg, and the order was bark 〉stem 〉 root 〉 branch 〉 leaf. The carbon contents in shrub, herb and litter layers were452.9 , 408.0 and 428.9 g/kg, respectively. Carbon content in the soil （0 -80 cm）was 16.59 g/kg. The carbon content in different organs of C. lanceolata ranged from 464.5 to 508.9 g/kg, and the order was bark 〉 stem 〉 branch 〉 root 〉 leaf. The carbon contents in shrub, herb and litter layers were 456.2, 416.3 and 468.1 g/kg, respectively. Carbon content in the soil （0 -80 cm）was 15.77 g/kg. Total carbon storage amounts of T. flousiana plantation and successive rotation plantation of C. lanceolata were 245.83 and 213.52 t/hm^2, respectively. The carbon storage order of different structure layers from T. flousiana plantation and successive rotation plantation of C. lanceolata was soil layer （0 -8 0 cm） 〉 vegetation layer 〉 litter layer. Annual net productivity in the arbor layers of T. flousiana plantation and successive rotation plantation of C. lanceolata plantations was 10.75 and 17.13 t/（hm^2 · a） ; annual net carbon fixation amounts were estimated as 5.05 and 3.47 t /（hm^2 · a） ; annual net absorption C02 amounts were 18.53 and 12.73 t/（hm^2 · a） respectively.展开更多
Carbon accumulation and spatial distribution as well as their variations in three different age(8-year-old,14-year-old and 28-year-old) stands of Taiwania flousiana plantation ecosystem were investigated in Nandan Sha...Carbon accumulation and spatial distribution as well as their variations in three different age(8-year-old,14-year-old and 28-year-old) stands of Taiwania flousiana plantation ecosystem were investigated in Nandan Shankou Forestry Station of Guangxi,China. The results showed that carbon content in different organs of T.flousiana ranged form 418.4 g·kg-1 to 516.4 g·kg-1,which was in order as follows:bark>branch>stem>root>leaf. The vertical distribution of carbon content within the stand was in the following order:tree layer>shrub layer>herb layer.Carbon content in the soil obviously declined with increased soil depth from 0 to 80 cm. Total carbon storage in the ecosystems was 159.37,194.21 and 278.22 t·hm-2,respectively for 8-year-old,14-yea-old and 28-yea-old stands. The tree layer in the three-age stands respectively accounted for 18.30%、28.37% and 43.59%;the shrub and herb layers for 0.14%、1.17% and 1.44%;the litter layer for 0.33%、0.89% and 1.11%;the soil for 81.23%、69.58% and 54.78% of the total storage of carbon. Carbon storage in different organs was roughly in proportion to the biomass of corresponding organ. For example,stem occupied the greatest proportion of carbon storage in the trees,up to 46.37%,and increased with the stand age while branches,leaves,bark and roots occupied more than 37.32%. The annual net productivity of the 8-year-old,14-year-old and 28-year-old T.flousiana plantation was respectively 8.93,10.82 and 12.53 t·hm-2a-1,and annual net carbon storage was respectively 4.19,5.07 and 5.93 t·hm-2a-1.展开更多
基金Supported by Guangxi Key R&D Plan Project(Guike AB17292008)Major Science and Technology Project of Guangxi Forestry(Guilin Science Word[2010]No.7)Guangxi Science Research and Technology Development Plan Program(Guikeneng 159825-38)
文摘[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]
基金Supported by Guangxi Key R&D Plan Project(Guike AB17292008)Guangxi Science Research and Technology Development Plan Program(Guikeneng 1598025-38)Major Science and Technology Project of Guangxi Forestry(Guilin Science Word[2010]No.7)
文摘The 23-year-old T. flousiana plantation and successive rotation plantation of C. lanceolata at Shankou Forest Farm of Nandan County, Guangxi were tested by the method of plot investigation combining with biomass measurement. Carbon storage and spatial distribution of different components in the two forests were analyzed. The results indicated that carbon content in different organs of T. flousiana ranged from 426.0 to 503.9 g/kg, and the order was bark 〉stem 〉 root 〉 branch 〉 leaf. The carbon contents in shrub, herb and litter layers were452.9 , 408.0 and 428.9 g/kg, respectively. Carbon content in the soil （0 -80 cm）was 16.59 g/kg. The carbon content in different organs of C. lanceolata ranged from 464.5 to 508.9 g/kg, and the order was bark 〉 stem 〉 branch 〉 root 〉 leaf. The carbon contents in shrub, herb and litter layers were 456.2, 416.3 and 468.1 g/kg, respectively. Carbon content in the soil （0 -80 cm）was 15.77 g/kg. Total carbon storage amounts of T. flousiana plantation and successive rotation plantation of C. lanceolata were 245.83 and 213.52 t/hm^2, respectively. The carbon storage order of different structure layers from T. flousiana plantation and successive rotation plantation of C. lanceolata was soil layer （0 -8 0 cm） 〉 vegetation layer 〉 litter layer. Annual net productivity in the arbor layers of T. flousiana plantation and successive rotation plantation of C. lanceolata plantations was 10.75 and 17.13 t/（hm^2 · a） ; annual net carbon fixation amounts were estimated as 5.05 and 3.47 t /（hm^2 · a） ; annual net absorption C02 amounts were 18.53 and 12.73 t/（hm^2 · a） respectively.
文摘Carbon accumulation and spatial distribution as well as their variations in three different age(8-year-old,14-year-old and 28-year-old) stands of Taiwania flousiana plantation ecosystem were investigated in Nandan Shankou Forestry Station of Guangxi,China. The results showed that carbon content in different organs of T.flousiana ranged form 418.4 g·kg-1 to 516.4 g·kg-1,which was in order as follows:bark>branch>stem>root>leaf. The vertical distribution of carbon content within the stand was in the following order:tree layer>shrub layer>herb layer.Carbon content in the soil obviously declined with increased soil depth from 0 to 80 cm. Total carbon storage in the ecosystems was 159.37,194.21 and 278.22 t·hm-2,respectively for 8-year-old,14-yea-old and 28-yea-old stands. The tree layer in the three-age stands respectively accounted for 18.30%、28.37% and 43.59%;the shrub and herb layers for 0.14%、1.17% and 1.44%;the litter layer for 0.33%、0.89% and 1.11%;the soil for 81.23%、69.58% and 54.78% of the total storage of carbon. Carbon storage in different organs was roughly in proportion to the biomass of corresponding organ. For example,stem occupied the greatest proportion of carbon storage in the trees,up to 46.37%,and increased with the stand age while branches,leaves,bark and roots occupied more than 37.32%. The annual net productivity of the 8-year-old,14-year-old and 28-year-old T.flousiana plantation was respectively 8.93,10.82 and 12.53 t·hm-2a-1,and annual net carbon storage was respectively 4.19,5.07 and 5.93 t·hm-2a-1.
