Energy Structural Features Of Three Tree Dominant Species In Qinling Mountains

Quercus aliena var. acuteserrata forest, Abies fabri forest and Betula albo-sinensis forestin Qinling Mountains were used as samples for sample-plot survey and laboratory tests. Eachorgan and total caloric value, ash content, ash-free caloric value and carbon content has beenmeasured. Additionally,we estimated biomass, energy, ash storage and carbon storage of thethree forest standing crops. Furthermore caloric value, ash content, carbon content, energy ashstorage and carbon storage in different organ and different tree species have beencompared,and the relationship between ash storage, carbon storage and energy of the threeforest have been analyzed. The results are shown as follew:1Total biomass, energy, ash storage and carbon storage of Quercus aliena var.acuteserrata forest standing crops were89.13t/hm2,1810.63GJ/hm2,2269.10kg/hm2and40.44t/hm2. The order of gross caloric value and ash-free caloric value in different organ ofQuercus aliena var. acuteserrata forest are leaf>branch>stem>root>bark andleaf>branch>stem>root>bark, respectively.The value of Ash content in different organ ofQuercus aliena var. acuteserrata forest is in order of bark>branch>root>leaf>stem. The valueof carbon content in different organ of Quercus aliena var. acuteserrata forest is in order ofbranch>leaf>bark>root>stem. From previous research,There was a significant negativecorrelation between bark caloric value and ash content. Stand caloric value and organ caloricvalue had a significant positive correlation with carbon content. Stand energy and organenergy had a significant negative correlation with ash storage except branch. Stand energy andorgan energy had a significant positive correlation with carbon storage.2Total biomass, energy, ash storage and carbon storage of Abies fabri forest standingcrops were74.01t/hm2,1594.87GJ/hm2,1839.20kg/hm2and33.55t/hm2. Gross caloricvalue and ash-free caloric value of Abies fabri forest in different organ were in order ofleaf>branch>stem>root>bark and leaf>branch>bark>stem>root, respectively. The order ofAsh content value in different organ ofAbies fabri forest is bark>branch>root>leaf>stem. Andthe order of carbon content value in different organ of Abies fabri forest isleaf>stem>bark>branch>root. There was a significant negative correlation between stemcaloric value and ash content, the same in leaf. Stand caloric value, stem caloric value, branchcaloric value, and leaf caloric value had a significant positive correlation with carbon content. Stand energy and organ energy had a significant negative correlation with ash storage exceptbranch. Stand energy and all organ energy had a significant positive correlation with carbonstorage.3Total biomass, energy, ash storage and carbon storage of Betula albo-sinensis foreststanding crops were68.51t/hm2,1430.18GJ/hm2,1580.96kg/hm2and30.06t/hm2. Grosscaloric value and ash-free caloric value of Betula albo-sinensis forest in different organ werein order of leaf>stem>root>bark>branch and leaf>bark>root>branch>stem, respectively. Theorder of Ash content value of Betula alb-sinensis forest in different organbark>root>branch>leaf>stem. The value of carbon content of Betula albo-sinensis forest indifferent organ is in order of leaf>stem>root>bark>branch. There was a significant negativecorrelation between bark caloric value and ash content, the same in branch. Stand caloricvalue and organ caloric value had a significant positive correlation with carbon content,except root. Stand energy and organ energy had a significant negative correlation with ashstorage except branch. Stand energy and all organ energy had a significant positive correlationwith carbon storage.4There was a significant difference in stand energy and all organ energy between Abiesfabri forest, Betula albo-sinensis forest and Quercus aliena var. acuteserrata forest. However,there was no significant difference in stand energy and all organ energy between Abies fabriforest and Betula albo-sinensis forest. Except stem ash storage, stand ash storage and organash storage were significant difference between Quercus aliena var. acuteserrata forest andthe other two forest, also stem ash storage and bark ash storage between Abies fabri forest andBetula albo-sinensis forest were significant difference. Stand carbon storage and all organcarbon storage were significant difference with Abies fabri forest and Betula albo-sinensisforest, and stand carbon storage and all organ carbon storage between Abies fabri forest andBetula albo-sinensis forest still no significant difference.