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

TU Hongtao, WAN Jie, SUN Yujun, MEI Guangyi, LIU Suzhen

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2015, Vol. 39 ›› Issue (06) : 81-86.

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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 (Natural Sciences Edition） ›› 2015, Vol. 39 ›› Issue (06) : 81-86. DOI: 10.3969/j.issn.1000-2006.2015.06.015

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

  • TU Hongtao1, WAN Jie2, SUN Yujun1*, MEI Guangyi1, LIU Suzhen1
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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.

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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 (Natural Sciences Edition）. 2015, 39(06): 81-86 https://doi.org/10.3969/j.issn.1000-2006.2015.06.015

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