Culm form analysis for bamboo, Phyllostachys pubescens

Inoue, Akio

doi:10.1007/s11676-013-0383-4

Cited by 14 publications

(16 citation statements)

References 23 publications

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“…However, most of these studies treated the entire culm of a bamboo as one sample, rather than a single internode. Accordingly, the discussed morphological parameters were often the total culm height and diameter at breast height (Inoue, ), which are meaningful at the forestry scale, but ignoring the length or diameter of each internode which contains much more detailed information for the culm morphology.…”

Section: Introductionmentioning

confidence: 99%

Internode morphometrics and allometry of Tonkin Cane Pseudosasa amabilis

Cheng

Hui

Reddy

et al. 2017

Ecology and Evolution

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Pseudosasa amabilis (McClure) (Poales: Gramineae) is a typical bamboo species naturally distributed in large area of south China and famous for its culm strength. Although bamboos were found to share the same development rule, the detailed internode morphology of bamboo culm was actually not fully expressed. We explored internode morphology of P. amabilis using 11 different physical parameters in different dimensions (1–4). As Taylor's power law (TPL) is generally applicable to describe relationship between mean and variance of population density, here we used TPL to evaluate the differences between internodes, and further, the relationship between dimension and TPL. Results showed that length (L), hollow radius (HR), hollow area (HA), hollow cylinder volume (HCV), total cylinder volume (TCV), density (De), and weight (W) all presented positive skewed distribution in varying degrees. For the basic one‐dimensional parameters, the 9th internode was the longest, the 7th the heaviest, while thickness (T) decreased with internodes. Diameter (D) decreased in general but with an inconspicuous local mode at the 5–6th internodes, potentially due to the rapid height growth. The longest (9th) internode was the “turning point” for T‐D and HR‐D relationships. Scatter plot changing trends of W to the one‐dimensional parameters after the heaviest (7th) internode were reversed, indicating a deceleration of growth speed. TPL was not holding well in one‐dimensional parameters (R 2: 0.5413–0.8125), but keep increasing as the parameter's dimension increasing (R 2 > 0.92 for two‐dimensional, R 2 > 0.97 for three‐dimensional, and R 2 > 0.99 for four‐dimensional parameters.), suggesting an emergence mechanism of TPL related to both the physical dimensions of morphological measures and the allometric growth of bamboo. From the physical fundamental level, all existences are the expression of energy distribution in different dimensions, implying a more general rule that energy distribution holds better TPL in higher dimension level.

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Section: Introductionmentioning

confidence: 99%

Internode morphometrics and allometry of Tonkin Cane Pseudosasa amabilis

Cheng

Hui

Reddy

et al. 2017

Ecology and Evolution

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“…In addition, the neiloid assumption of the culm form produced a negative bias, with the maximum and minimum biases being À25.225 and À3.278%, respectively (data not shown). The large biases are due to the fact that the culm of P. pubescens consisted of three or four segments with different forms in addition to the butt swell (Inoue 2013). Because of the complex culm form, the geometric approach (i.e.…”

Section: Geometric Approachmentioning

confidence: 99%

“…When a measurement point was located on the nodal part, its location was recorded. Note that the data has been already used for the culm form analysis in the previous work (Inoue 2013). A list of sample culms is given in Table 1.…”

Section: Datamentioning

confidence: 99%

“…The geometric approach, i.e. the cone, paraboloid and neiloid assumption, is too simplistic (Inoue 2013) and hence inappropriate for quantifying the S. These findings are useful for scaling the R AREA up to R C by the S.…”

Section: Application To the Scalingmentioning

confidence: 99%

“…The objective of this study was thus to compare the methods for quantifying the S for P. pubescens, which is one of the most common bamboos in Asia with economic importance and high potential for carbon sequestration (Yen and Lee 2011;Yen 2016). To archive this, first, nine samples of P. pubescens culms with various sizes were felled and the fine resolution analysis of the culm form (Osawa 1992;Inoue 2013) was conducted to determine the true S. Second, we compared the methods for quantifying the S of the sampled culms, i.e. the sectional measurement and geometric approaches.…”

Section: Introductionmentioning

confidence: 99%

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Comparing the methods for quantifying the culm surface area of bamboo, Phyllostachys pubescens

Inoue

Sakamoto

2017

Ecological Research

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We compared several methods for quantifying the culm surface area (S) of one of the most common bamboos in Japan, Phyllostachys pubescens Mazel ex Houz. Nine sample culms of P. pubescens were felled, and the true S was determined by the fine resolution analysis of the culm form (SFRA). The S was then calculated independently with the sectional measurement method from the successive diameters measured at equal intervals of one‐twentieth (S20), one‐tenth (S10), one‐fifth (S5) and one‐half (S2) of the total culm length. The S was also quantified geometrically from the total culm length and the diameter at breast height or at base by assuming that the culm form could be approximated by a cone (SDBH and SDAB). The SFRA was compared with each of the computed S values. For S10, S5 and S2, both the mean relative bias (%BIAS) and relative root mean square error (%RMSE) decreased with an increase in the number of measured diameters. The %BIAS and %RMSE of the S10 were, respectively, comparable and smaller compared to those of S20. The bias of the SDBH and SDAB suggested that the cone assumption of the culm form was violated. In conclusion, we recommend that the S should be quantified from the successive diameters measured at equal intervals of one‐tenth of the total culm length using the sectional measurement method.

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