JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2023, Vol. 47 ›› Issue (2): 87-94.doi: 10.12302/j.issn.1000-2006.202106026
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Received:
2021-06-21
Revised:
2021-08-23
Online:
2023-03-30
Published:
2023-03-28
CLC Number:
OU Jiande. Effects of forking on the crown morphology, growth and form quality of Taxus chinensis var. mairei[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2023, 47(2): 87-94.
Table 1
Crown morphological characteristics of Taxus chinensis var. mairei with different forking types"
树冠形态 crown morphological | 杈干木(MST) multi-stemed trees | 未杈干木(NMST) non multi-stemed trees | t |
---|---|---|---|
冠幅/m CW | 2.76±0.52 a | 2.65±0.43 a | 1.896 |
冠长/m CL | 3.17±1.00 b | 3.39±0.82 a | 2.078* |
冠形率 CSR | 1.17±0.40 b | 1.29±0.32 a | -2.861** |
树冠率 CR | 0.53±0.16 b | 0.61±0.13 a | -4.245** |
Table 2
Hierarchical distribution of crown characteristics of T. chinensis var. mairei with different forking types"
冠幅/m crown width | 分布比例/% proportion of grade | 冠形率 crown shape ratio | 分布比例/% proportion of grade | 树冠率 crown ratio | 分布比例/% proportion of grade | ||||
---|---|---|---|---|---|---|---|---|---|
MST | NMST | MST | NMST | MST | NMST | ||||
>1.0~1.5 | 0.83 | 0~0.5 | 1.25 | >0.1~0.2 | 2.33 | ||||
>1.5~2.0 | 3.49 | 3.33 | >0.5~1.0 | 28.75 | 15.83 | >0.2~0.3 | 3.49 | 1.67 | |
>2.0~2.5 | 29.07 | 26.67 | >1.0~1.5 | 51.25 | 58.75 | >0.3~0.4 | 16.28 | 4.17 | |
>2.5~3.0 | 33.72 | 46.25 | >1.5~2.0 | 11.25 | 22.50 | >0.4~0.5 | 18.60 | 13.75 | |
>3.0~3.5 | 24.42 | 20.42 | >2.0~2.5 | 7.50 | 2.08 | >0.5~0.6 | 19.77 | 26.67 | |
>3.5~4.0 | 5.81 | 2.08 | >2.5~3.0 | 0.84 | >0.6~0.7 | 25.58 | 22.08 | ||
>4.0~4.5 | 3.49 | 0.42 | >0.7~0.8 | 10.47 | 27.92 | ||||
>0.8~0.9 | 3.49 | 3.75 |
Table 3
Growth and form quality characters and comprehensive scores of T. chinensis var. mairei with different forking types"
形质性状 quality characters | 类型type | t | |
---|---|---|---|
MST | NMST | ||
地径/cm ground diameter | 13.50±1.99 a | 12.43±1.96 b | 4.338** |
胸径/cm DBH | 10.07±1.70 a | 9.21±1.50 b | 4.413** |
树高/m tree height | 5.93±0.66 a | 5.57±0.56 b | 4.866* |
材积指数/(cm2·m)volume index | 627.18±246.19 a | 492.86±173.33 b | 5.478** |
枝下高/m height under branch | 2.76±0.99 a | 2.17±0.76 b | 5.654** |
树干尖削度/(cm·m-1) taperingness | 2.29±0.32 a | 2.24±0.32 a | 1.321 |
树干圆满度stem completeness | 0.75±0.07 a | 0.74±0.06 a | 0.687 |
综合得分值comprehensive score | 0.52±0.10 a | 0.45±0.09 b | 5.622** |
Table 4
Hierarchical distribution of DBH and tree height of T. chinensis var. mairei with different forking types"
胸径/cm DBH | 分布比例/% proportion | 树高/m tree height | 分布比例/% proportion | ||
---|---|---|---|---|---|
MST | NMST | MST | NMST | ||
>4.0~5.0 | 1.67 | >3.0~3.5 | 0.42 | ||
>5.0~6.0 | 1.67 | >3.5~4.0 | 1.25 | ||
>6.0~7.0 | 2.33 | 3.75 | >4.0~4.5 | 2.33 | 2.50 |
>7.0~8.0 | 6.97 | 10.83 | >4.5~5.0 | 6.98 | 7.92 |
>8.0~9.0 | 15.12 | 24.17 | >5.0~5.5 | 9.30 | 20.00 |
>9.0~10.0 | 29.07 | 25.83 | >5.5~6.0 | 30.23 | 45.42 |
>10.0~11.0 | 18.60 | 20.00 | >6.0~6.5 | 23.26 | 17.07 |
>11.0~12.0 | 15.12 | 11.67 | >6.5~7.0 | 26.74 | 5.42 |
>12.0~13.0 | 5.81 | 0.42 | >7.0~7.5 | 1.16 | |
>13.0~14.0 | 3.49 | ||||
>14.0~15.0 | 3.40 |
Table 5
Path analyses of crown morphological characteristics and growth and form quality of T. chinensis var. mairei with different forking types"
性状 index | 类型 type | 直接通径系数direct path coefficient | 决定系数coefficient of determination | ||||
---|---|---|---|---|---|---|---|
冠幅 crown width | 冠形率 crown shape rate | 树冠率 crown ratio | 冠幅 crown width | 冠形率 crown shape rate | 树冠率 crown ratio | ||
胸径 DBH | 杈干木MST | 0.875** | 1.007** | -0.851** | 0.766 | 1.014 | 0.724 |
未杈干木NMST | 1.001** | 0.709** | -0.510** | 1.002 | 0.503 | 0.260 | |
树高 tree height | 杈干木MST | 1.058** | 2.100** | -1.867** | 1.119 | 4.410 | 3.486 |
未杈干木NMST | 1.376** | 1.886** | -1.717** | 1.893 | 3.557 | 2.948 | |
单株材积 individual volume | 杈干木MST | 0.967** | 1.314** | -1.126** | 0.935 | 1.727 | 1.268 |
未杈干木NMST | 1.143** | 1.026** | -0.818** | 1.306 | 1.053 | 0.669 | |
枝下高 height under branch | 杈干木MST | 0.286** | 0.564** | -1.444** | 0.082 | 0.318 | 2.085 |
未杈干木NMST | 0.393** | 0.525** | -1.440** | 0.154 | 0.276 | 2.074 | |
尖削度 taperingness | 杈干木MST | -0.045 | -0.776** | 0.679** | 0.002 | 0.602 | 0.461 |
未杈干木NMST | -0.019 | -0.858** | 0.856** | 0.000 | 0.736 | 0.733 | |
树干圆满度 stem completeness | 杈干木MST | 0.339* | 0.493** | -0.330* | 0.115 | 0.243 | 0.109 |
未杈干木NMST | 0.425** | 0.622** | -0.384* | 0.181 | 0.387 | 0.147 | |
综合得分 score | 杈干木MST | 0.992** | 1.429** | -1.345** | 0.984 | 2.042 | 1.809 |
未杈干木NMST | 1.210** | 1.191** | -1.090** | 1.464 | 1.418 | 1.188 |
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