Development of Two-way Volume Equation for Bamboo, Phyllostachys nigra

Inoue, Akio; Sakamoto, Shingo; Kitazato, Haruka; Sakuta, Kotaro

doi:10.20659/jfp.18.1_13

Cited by 6 publications

(11 citation statements)

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“…For all culm samples, S was calculated from H and successive diameters measured at one-tenth intervals of H using the sectional measurement method [25,39]. Similarly, apparent culm volume (V) [52,53] was computed with the same method [33][34][35][36]. To improve the reliability of the allometric equations, we also used published data on D, H, S and V of P. bambusoides from three sites [54]: Fukuoka (FU; n = 122), Kitakyushu (KI; n = 102) and Hisayama (HI; n = 96), Fukuoka Prefecture.…”

Section: Analyses Methodsmentioning

confidence: 99%

“…Despite the reliable data of site location, the soil type was estimated to be brown forest soil or ando soil [46]. These data were used previously to develop height-diameter curves, two-way volume equations and one-way volume tables [33][34][35][36]55]. Furthermore, a part of the P. pubescens data (150 of 200 culms) was used to determine predictive equations for S [39].…”

Section: Analyses Methodsmentioning

confidence: 99%

“…Phyllostachys nigra data were collected from two sites: the campus of Fukuoka University of Education in eastern Munakata City, Fukuoka Prefecture (33 • [45,46]. Both sites were very dense, and no other vegetation was found on their forest floors [34,35].…”

Section: Study Sitesmentioning

confidence: 99%

“…Therefore, many allometric equations have been developed to estimate stem surface area in various tree species based on commonly measured tree attributes such as diameter at breast height and total tree height [27][28][29][30][31]. Numerous equations have also been derived for estimating culm biomass or volume of bamboo species [11,[32][33][34][35][36][37][38], but only one study has investigated how S is related to other culm dimensions [39]. In Phyllostachys pubescens Mazel ex Houz., a common bamboo species in Asia with high potential for carbon sequestration [6,9,10,40], a power equation described the relationship between S and external culm diameter at breast height (D) [39].…”

Section: Introductionmentioning

confidence: 99%

“…and P. nigra var. henonis, which are called the three major useful bamboos in Japan [34,41]. In Japan, bamboo forests are estimated to cover more than 150,000 ha [42,43]; these three species account for more than 99% [44].…”

Section: Introductionmentioning

confidence: 99%

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Allometric Equations for Predicting Culm Surface Area of Three Bamboo Species (Phyllostachys spp.)

Inoue

Miyazawa²,

Sato

et al. 2018

Forests

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It is strongly debated whether bamboo forest ecosystems are a carbon sink or a carbon source because of insufficient knowledge regarding carbon loss via CO 2 emissions from these forests. The surface area (S) of bamboo culms (stems) is important for estimating culm respiration, a major component of carbon cycling in bamboo forests. However, few studies have attempted to formulate predictive equations for S. In this study, we developed allometric equations for predicting S in three bamboo species grown in Kyushu Island, western Japan: Phyllostachys pubescens Mazel ex Houz., P. bambusoides Sieb. et Zucc. and P. nigra var. henonis. We used a power equation between S and diameter at breast height (D) and a linear equation between S and D × total culm length (H). The results indicated that P. bambusoides and P. nigra shared common site-independent equations. In contrast, P. pubescens required species-specific equations due to interspecific variation in culm slenderness and tapering. We also found that D was a better predictive variable than DH when quantifying S because of its satisfactory predictive performance and simplicity. These findings will be beneficial for evaluating the contribution of bamboo forest ecosystems to carbon cycling.

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Section: Analyses Methodsmentioning

confidence: 99%

Section: Analyses Methodsmentioning

confidence: 99%

Section: Study Sitesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Allometric Equations for Predicting Culm Surface Area of Three Bamboo Species (Phyllostachys spp.)

Inoue

Miyazawa²,

Sato

et al. 2018

Forests

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A new taper index based on form-factor: application to three bamboo species (Phyllostachys spp.)

2021

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The form-factor for the stem surface area is directly proportional to the square root of the form-factor for the stem volume, i.e., the square root law of the form-factor. Although the square root law addresses the stems of coniferous trees, the nature of the proportional coefficient of the law has not been discussed. In this study, we demonstrated that the coefficient indicates the stem taper; therefore, it is named “Taper Index based on Form-Factor (TIFF).” We also examined the relationship between the form-factor for the culm surface area and the form-factor for the apparent culm volume of 570 culms across three bamboo species (Phyllostachys pubescens Mazel ex Houz., P. bambusoides Sieb. et Zucc., and P. nigra var. henonis). The square root law held true for all three bamboo species. The species-specific TIFF was determined to be 0.873 for P. pubescens, 0.897 for P. bambusoides, and 0.901 for P. nigra. This result implied that P. pubescens had a more tapering culm form compared to the other two species, while culm taper was similar between P. bambusoides and P. nigra. Our findings align with empirical observations of the culm taper of the bamboo species. Intra-species variation in TIFF was considerably small, allowing us to evaluate the species-specific culm taper from a small number of samples. Therefore, we conclude that TIFF provides a simple and useful method for quantifying species-specific culm or stem taper, and facilitates the estimation of merchantable or total volume.

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Culm form analysis for bamboo, Phyllostachys pubescens

Inoue

2013

Journal of Forestry Research

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Development of Two-way Volume Equation for Bamboo, Phyllostachys nigra

Cited by 6 publications

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Allometric Equations for Predicting Culm Surface Area of Three Bamboo Species (Phyllostachys spp.)

Allometric Equations for Predicting Culm Surface Area of Three Bamboo Species (Phyllostachys spp.)

A new taper index based on form-factor: application to three bamboo species (Phyllostachys spp.)

Culm form analysis for bamboo, Phyllostachys pubescens

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