Chin J Plan Ecolo ›› 2017, Vol. 41 ›› Issue (6): 661-669.DOI: 10.17521/cjpe.2016.0257
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Jing CHEN, Cheng-Zhang ZHAO*(), Ji-Wei WANG, Lian-Chun ZHAO
Received:
2017-05-03
Accepted:
2016-08-04
Online:
2017-06-10
Published:
2017-07-19
Contact:
Cheng-Zhang ZHAO
About author:
KANG Jing-yao(1991-), E-mail:
Jing CHEN, Cheng-Zhang ZHAO, Ji-Wei WANG, Lian-Chun ZHAO. Canopy structure and radiation interception of Salix matsudana: Stand density dependent relationships[J]. Chin J Plan Ecolo, 2017, 41(6): 661-669.
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密度分组 Density fractions | 密度区间 Density interval (Ind.·plot-1) | 样方数 Number of plots | 高度 Height (cm) | 胸径 Diameter at breast height (cm) | 郁闭度 Crown density (%) |
---|---|---|---|---|---|
低密度 Low density (I) | 25-36 | 26 | 398.57 ± 20.63c | 13.06 ± 0.61a | 42.84 ± 2.72c |
中密度 Medium density (II) | 37-48 | 38 | 454.69 ± 24.05b | 10.72 ± 0.58b | 69.56 ± 3.93b |
高密度 High density (III) | 49-60 | 36 | 521.23 ± 27.48a | 8.64 ± 0.39c | 87.09 ± 4.37a |
Table 1 Biological characteristics of Salix matsudana population (mean ± SE) at three stands of variable density
密度分组 Density fractions | 密度区间 Density interval (Ind.·plot-1) | 样方数 Number of plots | 高度 Height (cm) | 胸径 Diameter at breast height (cm) | 郁闭度 Crown density (%) |
---|---|---|---|---|---|
低密度 Low density (I) | 25-36 | 26 | 398.57 ± 20.63c | 13.06 ± 0.61a | 42.84 ± 2.72c |
中密度 Medium density (II) | 37-48 | 38 | 454.69 ± 24.05b | 10.72 ± 0.58b | 69.56 ± 3.93b |
高密度 High density (III) | 49-60 | 36 | 521.23 ± 27.48a | 8.64 ± 0.39c | 87.09 ± 4.37a |
Fig. 1 Canopy structure of Salix matsudana by density (mean ± SE). The lowercase letters indicate significant differences among density (p < 0.05). I, II, III, see Table 1.
密度 Density | |||
---|---|---|---|
I | II | III | |
土壤质量含水量 Mass moisture of soil (%) | 31.56 ± 1.52a | 34.83 ± 1.87a | 38.47 ± 2.01a |
土壤电导率 Soil electric conductivity (ms·cm-1) | 7.75 ± 0.41a | 4.09 ± 0.21b | 2.36 ± 0.13c |
光合有效辐射 PAR (μmol·m-2·s-1) | 981.26 ± 50.14a | 740.51 ± 39.08b | 434.67 ± 24.34c |
光截获 LI | 0.64 ± 0.03c | 0.81 ± 0.05a | 0.73 ± 0.04b |
净光合速率 Pn (μmol·m-2·s-1) | 10.27 ± 0.53b | 13.69 ± 0.61a | 9.26 ± 0.47c |
蒸腾速率 Tr (mmol·m-2·s-1) | 4.59 ± 0.23c | 6.52 ± 0.34a | 5.24 ± 0.27b |
水分利用率 WUE (μmol·mmol-1) | 2.34 ± 0.11a | 2.10 ± 0.09b | 1.77 ± 0.08c |
Table 2 Soil characteristics and photosynthetic characteristics of Salix matsudana stand by density (mean ± SE)
密度 Density | |||
---|---|---|---|
I | II | III | |
土壤质量含水量 Mass moisture of soil (%) | 31.56 ± 1.52a | 34.83 ± 1.87a | 38.47 ± 2.01a |
土壤电导率 Soil electric conductivity (ms·cm-1) | 7.75 ± 0.41a | 4.09 ± 0.21b | 2.36 ± 0.13c |
光合有效辐射 PAR (μmol·m-2·s-1) | 981.26 ± 50.14a | 740.51 ± 39.08b | 434.67 ± 24.34c |
光截获 LI | 0.64 ± 0.03c | 0.81 ± 0.05a | 0.73 ± 0.04b |
净光合速率 Pn (μmol·m-2·s-1) | 10.27 ± 0.53b | 13.69 ± 0.61a | 9.26 ± 0.47c |
蒸腾速率 Tr (mmol·m-2·s-1) | 4.59 ± 0.23c | 6.52 ± 0.34a | 5.24 ± 0.27b |
水分利用率 WUE (μmol·mmol-1) | 2.34 ± 0.11a | 2.10 ± 0.09b | 1.77 ± 0.08c |
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