TY - JOUR
T1 - Correlation between Height
T2 - Diameter ratio and shoot growth in containerised and bare-root seedlings of Cryptomeria japonica
AU - Yagihashi, Tsutomu
AU - Nakaya, Tomoki
AU - Nakahara, Kenichi
AU - Nasuno, Shun
AU - Hitsuma, Gaku
AU - Noguchi, Mahoko
AU - Yagi, Takanobu
AU - Saitoh, Tomoyuki
AU - Matsumoto, Kazuma
AU - Yamada, Takeshi
AU - Ochiai, Yukihito
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Previous studies revealed that in terms of the stem height growth, containerised seedlings with an average height: diameter ratio (HDR) of ca. 60 are superior to conventional bare-root seedlings and containerised seedlings with an average HDR of ca. 100 are inferior to conventional bare-root seedlings. In this study, we focused on the correlation between the stem growth and HDR in individual seedlings. We measured the stem growth of 2-year-old containerised seedlings and 3-year-old conventional bare-root seedlings for four growth seasons. In each of the growth seasons, HDR showed a negative correlation with stem height growth rate and a positive correlation with the stem radial growth rate of an individual seedling; the strongest correlation was observed in the first and second growth seasons. Therefore, the seedling with a high HDR allocated resources to stem radial growth rather than to height growth. Regarding the stem height growth, we analysed the sequential data for four growth seasons using a linear mixed effects model. HDR showed a negative correlation with the stem height growth. In conclusion, high HDR had negative effects on not only the relative height growth rate but also on the actual height growth.
AB - Previous studies revealed that in terms of the stem height growth, containerised seedlings with an average height: diameter ratio (HDR) of ca. 60 are superior to conventional bare-root seedlings and containerised seedlings with an average HDR of ca. 100 are inferior to conventional bare-root seedlings. In this study, we focused on the correlation between the stem growth and HDR in individual seedlings. We measured the stem growth of 2-year-old containerised seedlings and 3-year-old conventional bare-root seedlings for four growth seasons. In each of the growth seasons, HDR showed a negative correlation with stem height growth rate and a positive correlation with the stem radial growth rate of an individual seedling; the strongest correlation was observed in the first and second growth seasons. Therefore, the seedling with a high HDR allocated resources to stem radial growth rather than to height growth. Regarding the stem height growth, we analysed the sequential data for four growth seasons using a linear mixed effects model. HDR showed a negative correlation with the stem height growth. In conclusion, high HDR had negative effects on not only the relative height growth rate but also on the actual height growth.
KW - Containerised seedling
KW - Height growth
KW - Height: diameter ratio
KW - Radial growth
KW - Relative growth rate
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M3 - Article
AN - SCOPUS:84990026429
SN - 0021-485X
VL - 98
SP - 139
EP - 145
JO - THE JOURNAL of THE JAPANESE FORESTRY SOCIETY
JF - THE JOURNAL of THE JAPANESE FORESTRY SOCIETY
IS - 4
ER -