Biomass allocation and its model construction of Cunninghamia lanceolata plantations in Jiangxi Province

ZENG Wei, JIANG Bin, YU Lin, XIAO Fuming, XU Haining

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2016, Vol. 40 ›› Issue (03) : 177-182.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2016, Vol. 40 ›› Issue (03) : 177-182. DOI: 10.3969/j.issn.1000-2006.2016.03.029

Biomass allocation and its model construction of Cunninghamia lanceolata plantations in Jiangxi Province

  • ZENG Wei1, JIANG Bin2, YU Lin1, XIAO Fuming1*, XU Haining1
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Abstract

In order to study the dynamic biomass allocation pattern and their accurate estimation methods of Cunninghamia lanceolata plantations in Jiangxi Province, biomass data at different stand ages were analyzed at the provincial scale. Biomass of C. lanceolata plantations in Jiangxi Province ranged from 55.64 to 165.22 t/hm2, and biomass at tree layer accounted for more than 94.2%. The biomass of C. lanceolata plantations and their tree layers increased with the increasing of age at first, then decreased. The biomass at shrub layer, herb layer or litter had no significant differences among all different ages. The permutation orders of biomass of each components in young, premature and mature plantations were followed as tree layer > litter layer > shrub layer > herb layer. However, the permutation orders in middle-aged and overage plantations were followed as tree layer > litter layer > herb layer > shrub layer. The permutation order of biomass of each organs in young plantation were followed as trunk > leaf > root > branch, but the permutation orders in other four plantations were followed as trunk > root > branch> leaf. The predicted values by the both an individual biomass model(W=0.266D2.069), which was based on the independent variable diameter at breast height(D), and a double variable model(W=0.046 9(D2H)0.906 4), which was based on the diameter at breast height(D)and height(H), were all less than the measured values. The prediction accuracy of the two models(R2)were all 0.84, and lower than 0.91 of a three variable model(W=11.497D1.847A0.082N-0.478)which was based on the diameter at breast height(D), age(A)and density(N).

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ZENG Wei, JIANG Bin, YU Lin, XIAO Fuming, XU Haining. Biomass allocation and its model construction of Cunninghamia lanceolata plantations in Jiangxi Province[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2016, 40(03): 177-182 https://doi.org/10.3969/j.issn.1000-2006.2016.03.029

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