Biodiv Sci ›› 2014, Vol. 22 ›› Issue (2): 174-181. DOI: 10.3724/SP.J.1003.2014.08139
• Orginal Article • Previous Articles Next Articles
Hongling Guo1,2, Zhiwen Li2, Zhishu Xiao1,*()
Received:
2013-06-14
Accepted:
2013-11-05
Online:
2014-03-20
Published:
2014-04-03
Contact:
Xiao Zhishu
Hongling Guo,Zhiwen Li,Zhishu Xiao. Factors influencing the fruit crops and seed fates of Pistacia chinensis: the results of structural equation modeling[J]. Biodiv Sci, 2014, 22(2): 174-181.
变量 Variables | 均值±标准误 Mean ± SE | 变量范围 Range |
---|---|---|
树高 Tree height (m) | 7.67 ± 0.29 | 3.82–12.40 |
胸径 DBH (cm) | 14.05 ± 1.06 | 5.60–37.70 |
树冠面积 Crown area (cm2) | 92.83 ± 10.41 | 16.79–333.83 |
果序大小 Infructescence size | 112.01 ± 4.67 | 55.05–214.77 |
果实大小 Fruit size (cm3) | 0.122 ± 0.004 | 0.07–0.19 |
果实产量 Log (crop) | 4.49 ± 0.11 | 2.25–5.59 |
空壳率 Seedless rate (%) | 54.73 ± 3.89 | 11–99 |
虫蛀率 Insect-infested rate (%) | 22.36 ± 3.29 | 0–85 |
完好率 Sound rate (%) | 22.91 ± 3.13 | 0–73.50 |
Table 1 General statistics (mean ± SE) of plant and fruit traits, fruit crops and seed fates of Pistacia chinensis in Jiyuan City, Henan Province
变量 Variables | 均值±标准误 Mean ± SE | 变量范围 Range |
---|---|---|
树高 Tree height (m) | 7.67 ± 0.29 | 3.82–12.40 |
胸径 DBH (cm) | 14.05 ± 1.06 | 5.60–37.70 |
树冠面积 Crown area (cm2) | 92.83 ± 10.41 | 16.79–333.83 |
果序大小 Infructescence size | 112.01 ± 4.67 | 55.05–214.77 |
果实大小 Fruit size (cm3) | 0.122 ± 0.004 | 0.07–0.19 |
果实产量 Log (crop) | 4.49 ± 0.11 | 2.25–5.59 |
空壳率 Seedless rate (%) | 54.73 ± 3.89 | 11–99 |
虫蛀率 Insect-infested rate (%) | 22.36 ± 3.29 | 0–85 |
完好率 Sound rate (%) | 22.91 ± 3.13 | 0–73.50 |
变量 Variables | 果实产量 Log(crop) | 空壳率 Seedless rate (%) | 虫蛀率 Insect-infested rate (%) | 完好率 Sound rate (%) | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
直接影响 Direct effect | 间接影响 Indirect effect | 总影响 Total effect | 直接影响 Direct effect | 间接影响 Indirect effect | 总影响 Total effect | 直接影响 Direct effect | 间接影响 Indirect effect | 总影响 Total effect | 直接影响 Direct effect | 间接影响 Indirect effect | 总影响 Total effect | |||||||||||||
树高 Tree height | – | – | – | – | – | – | 0.394* | – | 0.394 | – | –0.377 | –0.377 | ||||||||||||
胸径 DBH | 0.244 | – | 0.244 | –0.278* | – | –0.278 | –0.388* | 0.123 | –0.265 | – | 0.497 | 0.497 | ||||||||||||
树冠面积 Crown area | – | – | – | – | – | – | – | – | – | – | – | – | ||||||||||||
果序大小 Infructescence size | 0.465** | – | 0.465 | –0.469** | – | –0.469 | – | 0.197 | 0.197 | – | 0.222 | 0.222 | ||||||||||||
果实大小 Fruit size | 0.181 | – | 0.181 | – | – | – | 0.437** | –0.034 | 0.403 | –0.111 | –0.386 | –0.497 | ||||||||||||
果实产量 Log(crop) | – | – | – | – | – | – | –0.184 | – | –0.184 | – | 0.177 | 0.177 | ||||||||||||
空壳率 Seedless rate (%) | – | – | – | – | – | – | –0.603** | – | –0.603 | –0.874** | 0.577 | –0.297 | ||||||||||||
虫蛀率 Insect-infested rate (%) | – | – | – | – | – | – | – | – | – | –0.957** | – | –0.957 | ||||||||||||
决定系数 Coefficient of determination (R2) | 0.309 | 0.297 | 0.577 | 0.822 |
Table 2 Magnitude of direct, indirect and total effects (standardized path coefficients) of plant and fruit traits on fruit crops and seed fates of Pistacia chinensis in Jiyuan City, Henan Province
变量 Variables | 果实产量 Log(crop) | 空壳率 Seedless rate (%) | 虫蛀率 Insect-infested rate (%) | 完好率 Sound rate (%) | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
直接影响 Direct effect | 间接影响 Indirect effect | 总影响 Total effect | 直接影响 Direct effect | 间接影响 Indirect effect | 总影响 Total effect | 直接影响 Direct effect | 间接影响 Indirect effect | 总影响 Total effect | 直接影响 Direct effect | 间接影响 Indirect effect | 总影响 Total effect | |||||||||||||
树高 Tree height | – | – | – | – | – | – | 0.394* | – | 0.394 | – | –0.377 | –0.377 | ||||||||||||
胸径 DBH | 0.244 | – | 0.244 | –0.278* | – | –0.278 | –0.388* | 0.123 | –0.265 | – | 0.497 | 0.497 | ||||||||||||
树冠面积 Crown area | – | – | – | – | – | – | – | – | – | – | – | – | ||||||||||||
果序大小 Infructescence size | 0.465** | – | 0.465 | –0.469** | – | –0.469 | – | 0.197 | 0.197 | – | 0.222 | 0.222 | ||||||||||||
果实大小 Fruit size | 0.181 | – | 0.181 | – | – | – | 0.437** | –0.034 | 0.403 | –0.111 | –0.386 | –0.497 | ||||||||||||
果实产量 Log(crop) | – | – | – | – | – | – | –0.184 | – | –0.184 | – | 0.177 | 0.177 | ||||||||||||
空壳率 Seedless rate (%) | – | – | – | – | – | – | –0.603** | – | –0.603 | –0.874** | 0.577 | –0.297 | ||||||||||||
虫蛀率 Insect-infested rate (%) | – | – | – | – | – | – | – | – | – | –0.957** | – | –0.957 | ||||||||||||
决定系数 Coefficient of determination (R2) | 0.309 | 0.297 | 0.577 | 0.822 |
Fig. 1 Path diagram for the effects of plant and fruit traits on fruit crop and seed fates of Pistacia chinensis in Jiyuan City, Henan Province. A, Initial prediction model; B, Optimization model. Positive effects are indicated by solid lines and negative effects by dashed lines. Double-headed arrows indicate correlations between traits. The widths of the arrows in Model B indicate the magnitude of the standardized path coefficients.
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