Chin J Plant Ecol ›› 2013, Vol. 37 ›› Issue (4): 296-305.DOI: 10.3724/SP.J.1258.2013.00029
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WU Qi-Qian1, WU Fu-Zhong1, YANG Wan-Qin1,*(), XU Zhen-Feng1, HE Wei1, HE Min1, ZHAO Ye-Yi1, ZHU Jian-Xiao1,2
Received:
2012-12-12
Accepted:
2013-02-12
Online:
2013-12-12
Published:
2013-04-09
Contact:
YANG Wan-Qin
WU Qi-Qian, WU Fu-Zhong, YANG Wan-Qin, XU Zhen-Feng, HE Wei, HE Min, ZHAO Ye-Yi, ZHU Jian-Xiao. Effect of seasonal snow cover on litter decomposition in alpine forest[J]. Chin J Plant Ecol, 2013, 37(4): 296-305.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2013.00029
Fig. 2 Dynamics of soil and air temperature under different snow cover conditions in alpine forest of western Sichuan from 26 October 2010 to 29 October 2012.
Fig. 3 Litter mass loss rates of four tree species under different snow cover conditions (mean ± SD, n = 3). A, Abies faxoniana. B, Larix mastersiana. C, Sabina saltuaria. D, Betula albosinensi. *, significant difference among treatments (LSD’s multiple range test; p < 0.05).
第一年 First year | 第二年 Second year | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
OF | DF | TS | EGS | LGS | OF | DF | TS | EGS | LGS | |||
pS | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | ||
pC | 0.081 | 0.000** | 0.000** | 0.000** | 0.217 | 0.054 | 0.000** | 0.000** | 0.000** | 0.000** | ||
pS×C | 0.696 | 0.437 | 0.018* | 0.151 | 0.974 | 0.628 | 0.319 | 0.318 | 0.332 | 0.397 |
Table 1 Effects of species (S) and snow cover (C) on litter mass loss rates in alpine forest
第一年 First year | 第二年 Second year | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
OF | DF | TS | EGS | LGS | OF | DF | TS | EGS | LGS | |||
pS | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | 0.000** | ||
pC | 0.081 | 0.000** | 0.000** | 0.000** | 0.217 | 0.054 | 0.000** | 0.000** | 0.000** | 0.000** | ||
pS×C | 0.696 | 0.437 | 0.018* | 0.151 | 0.974 | 0.628 | 0.319 | 0.318 | 0.332 | 0.397 |
物种 Species | 雪被 Snow cover | 回归方程 Regression models | 分解系数 k Decomposition constant k | 相关系数 r2 Correlation coefficient r2 | 半分解时间 Time of half decomposition (a) | 95%分解时间 Time of 95% decomposition (a) | 显著性 Significance |
---|---|---|---|---|---|---|---|
岷江冷杉 Abies faxoniana | 厚型雪被 Thick snow cover | y = 94.89e-0.257t | 0.257 | 0.95 | 2.73 | 11.80 | p < 0.001 |
较厚型雪被 Thicker snow cover | y = 94.70e-0.240t | 0.240 | 0.96 | 2.93 | 12.66 | p < 0.001 | |
中型雪被 Medium snow cover | y = 93.21e-0.224t | 0.224 | 0.96 | 3.13 | 13.55 | p < 0.001 | |
薄型雪被 Thin snow cover | y = 93.65e-0.201t | 0.201 | 0.95 | 3.45 | 15.12 | p < 0.001 | |
无雪被 No snow cover | y = 96.03e-0.215t | 0.215 | 0.94 | 3.27 | 14.12 | p < 0.001 | |
四川红杉 Larix mastersiana | 厚型雪被 Thick snow cover | y = 87.58e-0.249t | 0.249 | 0.92 | 2.76 | 11.94 | p < 0.001 |
较厚型雪被 Thicker snow cover | y = 86.91e-0.236t | 0.236 | 0.92 | 2.98 | 12.88 | p < 0.001 | |
中型雪被 Medium snow cover | y = 88.88e-0.237t | 0.237 | 0.95 | 2.96 | 12.81 | p < 0.001 | |
薄型雪被 Thin snow cover | y = 88.87e-0.230t | 0.230 | 0.95 | 3.05 | 13.19 | p < 0.001 | |
无雪被 No snow cover | y = 92.19e-0.253t | 0.253 | 0.96 | 2.77 | 11.99 | p < 0.001 | |
方枝柏 Sabina saltuaria | 厚型雪被 Thick snow cover | y = 94.31e-0.279t | 0.279 | 0.95 | 2.52 | 10.87 | p < 0.001 |
较厚型雪被 Thicker snow cover | y = 94.42e-0.273t | 0.273 | 0.99 | 2.57 | 11.11 | p < 0.001 | |
中型雪被 Medium snow cover | y = 97.76e-0.279t | 0.279 | 0.97 | 2.52 | 10.89 | p < 0.001 | |
薄型雪被 Thin snow cover | y = 94.97e-0.271t | 0.271 | 0.95 | 2.60 | 11.23 | p < 0.001 | |
无雪被 No snow cover | y = 98.35e-0.272t | 0.272 | 0.98 | 2.58 | 11.15 | p < 0.001 | |
红桦 Betula albosinensis | 厚型雪被 Thick snow cover | y = 92.88e-0.321t | 0.321 | 0.97 | 2.19 | 9.46 | p < 0.001 |
较厚型雪被 Thicker snow cover | y = 93.92e-0.326t | 0.326 | 0.96 | 2.16 | 9.32 | p < 0.001 | |
中型雪被 Medium snow cover | y = 92.71e-0.317t | 0.317 | 0.97 | 2.22 | 9.58 | p < 0.001 | |
薄型雪被 Thin snow cover | y = 94.42e-0.327t | 0.327 | 0.97 | 2.15 | 9.30 | p < 0.001 | |
无雪被 No snow cover | y = 97.49e-0.338t | 0.338 | 0.96 | 2.08 | 8.98 | p < 0.001 |
Table 2 Leaf litter decomposition constant, correlation coefficient, and time of 50% and 95% decomposition of four tree species under different snow cover conditions
物种 Species | 雪被 Snow cover | 回归方程 Regression models | 分解系数 k Decomposition constant k | 相关系数 r2 Correlation coefficient r2 | 半分解时间 Time of half decomposition (a) | 95%分解时间 Time of 95% decomposition (a) | 显著性 Significance |
---|---|---|---|---|---|---|---|
岷江冷杉 Abies faxoniana | 厚型雪被 Thick snow cover | y = 94.89e-0.257t | 0.257 | 0.95 | 2.73 | 11.80 | p < 0.001 |
较厚型雪被 Thicker snow cover | y = 94.70e-0.240t | 0.240 | 0.96 | 2.93 | 12.66 | p < 0.001 | |
中型雪被 Medium snow cover | y = 93.21e-0.224t | 0.224 | 0.96 | 3.13 | 13.55 | p < 0.001 | |
薄型雪被 Thin snow cover | y = 93.65e-0.201t | 0.201 | 0.95 | 3.45 | 15.12 | p < 0.001 | |
无雪被 No snow cover | y = 96.03e-0.215t | 0.215 | 0.94 | 3.27 | 14.12 | p < 0.001 | |
四川红杉 Larix mastersiana | 厚型雪被 Thick snow cover | y = 87.58e-0.249t | 0.249 | 0.92 | 2.76 | 11.94 | p < 0.001 |
较厚型雪被 Thicker snow cover | y = 86.91e-0.236t | 0.236 | 0.92 | 2.98 | 12.88 | p < 0.001 | |
中型雪被 Medium snow cover | y = 88.88e-0.237t | 0.237 | 0.95 | 2.96 | 12.81 | p < 0.001 | |
薄型雪被 Thin snow cover | y = 88.87e-0.230t | 0.230 | 0.95 | 3.05 | 13.19 | p < 0.001 | |
无雪被 No snow cover | y = 92.19e-0.253t | 0.253 | 0.96 | 2.77 | 11.99 | p < 0.001 | |
方枝柏 Sabina saltuaria | 厚型雪被 Thick snow cover | y = 94.31e-0.279t | 0.279 | 0.95 | 2.52 | 10.87 | p < 0.001 |
较厚型雪被 Thicker snow cover | y = 94.42e-0.273t | 0.273 | 0.99 | 2.57 | 11.11 | p < 0.001 | |
中型雪被 Medium snow cover | y = 97.76e-0.279t | 0.279 | 0.97 | 2.52 | 10.89 | p < 0.001 | |
薄型雪被 Thin snow cover | y = 94.97e-0.271t | 0.271 | 0.95 | 2.60 | 11.23 | p < 0.001 | |
无雪被 No snow cover | y = 98.35e-0.272t | 0.272 | 0.98 | 2.58 | 11.15 | p < 0.001 | |
红桦 Betula albosinensis | 厚型雪被 Thick snow cover | y = 92.88e-0.321t | 0.321 | 0.97 | 2.19 | 9.46 | p < 0.001 |
较厚型雪被 Thicker snow cover | y = 93.92e-0.326t | 0.326 | 0.96 | 2.16 | 9.32 | p < 0.001 | |
中型雪被 Medium snow cover | y = 92.71e-0.317t | 0.317 | 0.97 | 2.22 | 9.58 | p < 0.001 | |
薄型雪被 Thin snow cover | y = 94.42e-0.327t | 0.327 | 0.97 | 2.15 | 9.30 | p < 0.001 | |
无雪被 No snow cover | y = 97.49e-0.338t | 0.338 | 0.96 | 2.08 | 8.98 | p < 0.001 |
Fig. 4 Contribution rates (%) of different snow covers to mass loss of four leaf litters in each decomposition stage. A, Abies faxoniana. B, Larix mastersiana. C, Sabina saltuaria. D, Betula albosinensi. OF, onset of freezing period; DF, deep freezing period; TS, thawing stage; EGS, early growing season; LGS, late growing season.
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