Chin J Plant Ecol ›› 2014, Vol. 38 ›› Issue (6): 550-561.DOI: 10.3724/SP.J.1258.2014.00051
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HE Jie,YANG Wan-Qin,NI Xiang-Yin,LI Han,XU Li-Ya,WU Fu-Zhong()
Received:
2014-02-28
Accepted:
2014-04-14
Online:
2014-02-28
Published:
2014-06-10
Contact:
WU Fu-Zhong
HE Jie,YANG Wan-Qin,NI Xiang-Yin,LI Han,XU Li-Ya,WU Fu-Zhong. Effects of snow patch on the dynamics of potassium and sodium during litter decomposition in winter in a subalpine forest of western Sichuan[J]. Chin J Plant Ecol, 2014, 38(6): 550-561.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2014.00051
物种 Species | C (g·kg-1) | N (g·kg-1) | P (g·kg-1) | K (g·kg-1) | Na (mg·kg-1) |
---|---|---|---|---|---|
康定柳 Salix paraplesia | 452.3 ± 16.5a | 11.5 ± 0.3a | 1.1 ± 0.0a | 18.3 ± 0.2a | 21.0 ± 0.7a |
红桦 Betula albosinensis | 496.9 ± 14.5b | 13.4 ± 0.2b | 0.9 ± 0.0b | 3.4 ± 0.0b | 36.7 ± 1.8b |
高山杜鹃 Rhododendron lapponicum | 502.9 ± 16.0b | 6.7 ± 0.2c | 1.1 ± 0.1a | 3.8 ± 0.0c | 15.9 ± 0.8c |
岷江冷杉 Abies faxoniana | 505.6 ± 29.6b | 8.8 ± 0.0d | 1.1 ± 0.1ac | 6.5 ± 0.2d | 30.6 ± 1.2d |
方枝柏 Sabina saltuaria | 516.4 ± 17.7bc | 8.8 ± 0.1d | 1.2 ± 0.1cd | 5.7 ± 0.0e | 39.0 ± 5.7b |
四川红杉 Larix mastersiana | 543.5 ± 6.3c | 8.6 ± 0.4d | 1.3 ± 0.0d | 6.3 ± 0.1d | 22.3 ± 2.3a |
Table 1 Initial nutrient concentrations in litter of Salix paraplesia, Betula albosinensis, Rhododendron lapponicum, Abies faxoniana, Sabina saltuaria and Larix mastersiana (mean ± SD)
物种 Species | C (g·kg-1) | N (g·kg-1) | P (g·kg-1) | K (g·kg-1) | Na (mg·kg-1) |
---|---|---|---|---|---|
康定柳 Salix paraplesia | 452.3 ± 16.5a | 11.5 ± 0.3a | 1.1 ± 0.0a | 18.3 ± 0.2a | 21.0 ± 0.7a |
红桦 Betula albosinensis | 496.9 ± 14.5b | 13.4 ± 0.2b | 0.9 ± 0.0b | 3.4 ± 0.0b | 36.7 ± 1.8b |
高山杜鹃 Rhododendron lapponicum | 502.9 ± 16.0b | 6.7 ± 0.2c | 1.1 ± 0.1a | 3.8 ± 0.0c | 15.9 ± 0.8c |
岷江冷杉 Abies faxoniana | 505.6 ± 29.6b | 8.8 ± 0.0d | 1.1 ± 0.1ac | 6.5 ± 0.2d | 30.6 ± 1.2d |
方枝柏 Sabina saltuaria | 516.4 ± 17.7bc | 8.8 ± 0.1d | 1.2 ± 0.1cd | 5.7 ± 0.0e | 39.0 ± 5.7b |
四川红杉 Larix mastersiana | 543.5 ± 6.3c | 8.6 ± 0.4d | 1.3 ± 0.0d | 6.3 ± 0.1d | 22.3 ± 2.3a |
Fig. 1 Changes in the thickness of snow patches in different critical periods (mean ± SD). SP1, thick snow patch; SP2, moderate snow patch; SP3, thin snow patch.
Fig. 2 The dynamics of litter and air temperatures under different snow patches in the subalpine forest of western Sichuan. SP1, thick snow patch; SP2, moderate snow patch; SP3, thin snow patch; SP4, absence of snow patch.
Fig. 3 Dynamics of K concentration in litter during decomposition under different snow patches (mean ± SD, n = 3). IS, initial stage; SC, snow cover stage; SF, snow formation stage; SM, snow melt stage. SP1, thick snow patch; SP2, moderate snow patch; SP3, thin snow patch; SP4, absence of snow patch. Different lowercase letters indicate significant differences (p < 0.05) among different snow patches within the same critical periods.
Fig. 5 Rate of K release from litter during decomposition under different snow patches in different critical periods (mean ± SD, n = 3). See Fig. 3 for notes. FT, freeze-thaw period.
Fig. 6 Rate of Na release from litter during decomposition under different snow patches in different critical periods (mean ± SD, n = 3). See Fig. 3 for notes. FT, freeze-thaw period.
Fig. 7 Rates of daily K and Na release from litter under different snow patches in different critical periods (n = 3). IS, initial stage; SC, snow cover stage; SF, snow formation stage; SM, snow melt stage. SP1, thick snow patch; SP2, moderate snow patch; SP3, thin snow patch; SP4, absence of snow patch. * indicates significant differences among different snow patches (p < 0.05).
康定柳 Salix paraplesia | 四川红杉 Larix mastersiana | 岷江冷杉 Abies faxoniana | 高山杜鹃 Rhododendron lapponicum | 红桦 Betula albosinensis | 方枝柏 Sabina saltuaria | |
---|---|---|---|---|---|---|
K释放率 Rate of K release | 0.630** | 0.401* | 0.780** | 0.711** | 0.555** | 0.732** |
K释放速率 Daily rate of K release | 0.712** | 0.334* | 0.780** | 0.731** | 0.654** | 0.805** |
Na释放率 Rate of Na release | 0.767** | 0.424** | 0.703** | 0.817** | -0.706** | -0.087 |
Na释放速率 Daily rate of Na release | 0.838** | 0.399* | 0.774** | 0.885** | -0.861** | -0.202 |
Table 2 Correlations of the rate and daily rate of element release with daily mean litter temperature in different tree species during the snow cover period (n = 36)
康定柳 Salix paraplesia | 四川红杉 Larix mastersiana | 岷江冷杉 Abies faxoniana | 高山杜鹃 Rhododendron lapponicum | 红桦 Betula albosinensis | 方枝柏 Sabina saltuaria | |
---|---|---|---|---|---|---|
K释放率 Rate of K release | 0.630** | 0.401* | 0.780** | 0.711** | 0.555** | 0.732** |
K释放速率 Daily rate of K release | 0.712** | 0.334* | 0.780** | 0.731** | 0.654** | 0.805** |
Na释放率 Rate of Na release | 0.767** | 0.424** | 0.703** | 0.817** | -0.706** | -0.087 |
Na释放速率 Daily rate of Na release | 0.838** | 0.399* | 0.774** | 0.885** | -0.861** | -0.202 |
K释放率 Rate of K release | Na释放率 Rate of Na release | |||||||
---|---|---|---|---|---|---|---|---|
SF | SC | SM | FT | SF | SC | SM | FT | |
A | 4.114* | 7.785** | 5.894** | 5.378** | 222.571** | 78.155** | 13.751** | 104.938** |
B | 164.946** | 24.376** | 22.351** | 106.188** | 984.280** | 1146.744** | 743.108** | 1979.735** |
C | 7.676** | 10.262** | 17.226** | 10.350** | 123.474** | 32.632** | 63.561** | 44.114** |
Table 3 Summary of two-way ANOVA on the effects of snow patch and species on the rate of element release in different critical periods (n = 72)
K释放率 Rate of K release | Na释放率 Rate of Na release | |||||||
---|---|---|---|---|---|---|---|---|
SF | SC | SM | FT | SF | SC | SM | FT | |
A | 4.114* | 7.785** | 5.894** | 5.378** | 222.571** | 78.155** | 13.751** | 104.938** |
B | 164.946** | 24.376** | 22.351** | 106.188** | 984.280** | 1146.744** | 743.108** | 1979.735** |
C | 7.676** | 10.262** | 17.226** | 10.350** | 123.474** | 32.632** | 63.561** | 44.114** |
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