Root biomass of the Chinese fir at different ages and its compatible models

doi:10.3969/j.issn.1000-2006.2015.06.015

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2015, Vol. 39 ›› Issue (06): 81-86.doi: 10.3969/j.issn.1000-2006.2015.06.015

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Root biomass of the Chinese fir at different ages and its compatible models

TU Hongtao¹, WAN Jie², SUN Yujun^1*, MEI Guangyi¹, LIU Suzhen¹

1.Key Laboratory for Silviculture and Conservation,Ministry of Education, Beijing Forestry University, Beijing 100083, China;
2.The Center of the Project Management of World Bank Loan, National Forestry Bureau, Beijing 100714, China

Online:2015-11-30 Published:2015-11-30

Abstract

Abstract: Based on Chinese fir plantation in Fujian Province, we studied the proportion of root biomass of each component(root stake, thick-root, medium-root, small-root, fine-root)with the forest age variation through the fixed sample plot method. We constructed the optimum biomass model of root stake, thick-root, medium-root, small-root, fine-root by using R analysis software. According to controlling the volume and component of root, we built the compatible models and evaluated the models. Results showed that root biomass of the average individual tree decreased with planting age increase. Biomasses of different root diameter classes ranked as root stake > thick-root > medium-root > small-root> fine-root. Among them root stake and thick-root accounted for more than 80% of total root biomass. So the thick root were mainly distributed in the 20-80 cm soil layer. The nonlinear compatible model could be established quickly by using R analysis software. It could completely and objectively reflect the distribution relationship of biomasses among various components(R²>0.77,P>84.7,e<0.153), solve the incompatibility among the components and improve the accuracy of the models.

CLC Number:

S718

TU Hongtao, WAN Jie, SUN Yujun, MEI Guangyi, LIU Suzhen. Root biomass of the Chinese fir at different ages and its compatible models [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2015, 39(06): 81-86.

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Root biomass of the Chinese fir at different ages and its compatible models

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