Chin J Plant Ecol ›› 2012, Vol. 36 ›› Issue (2): 99-108.DOI: 10.3724/SP.J.1258.2012.00099
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TU Li-Hua1, HU Hong-Ling1,2, HU Ting-Xing1,*(), ZHANG Jian2, LUO Shou-Hua1, DAI Hong-Zhong1
Received:
2011-11-23
Accepted:
2011-12-16
Online:
2012-11-23
Published:
2012-02-22
Contact:
HU Ting-Xing
TU Li-Hua, HU Hong-Ling, HU Ting-Xing, ZHANG Jian, LUO Shou-Hua, DAI Hong-Zhong. Response of Betula luminifera leaf litter decomposition to simulated nitrogen deposition in the Rainy Area of West China[J]. Chin J Plant Ecol, 2012, 36(2): 99-108.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2012.00099
容重 Bulk density (g·cm-3) | 最大持水量 Full water capacity (%) | 总孔隙度 Total porosity (% ) | 有机碳 Organic carbon (g·kg-1) | 全氮 Total nitrogen (g·kg-1) | 有效氮 Available nitrogen (mg·kg-1) | 有效磷 Available phosphorus (mg·kg-1) | 速效钾 Available potassium (mg·kg-1) | pH |
---|---|---|---|---|---|---|---|---|
1.29 ± 0.05 | 39.06 ± 4.01 | 50.29 ± 6.01 | 9.18 ± 1.53 | 1.54 ± 0.21 | 69.88 ± 6.53 | 14.11 ± 0.85 | 2.64 ± 0.18 | 4.88 ± 0.15 |
Table 1 Basic physical and chemical properties of 0-10 cm soil layer (mean ± SE)
容重 Bulk density (g·cm-3) | 最大持水量 Full water capacity (%) | 总孔隙度 Total porosity (% ) | 有机碳 Organic carbon (g·kg-1) | 全氮 Total nitrogen (g·kg-1) | 有效氮 Available nitrogen (mg·kg-1) | 有效磷 Available phosphorus (mg·kg-1) | 速效钾 Available potassium (mg·kg-1) | pH |
---|---|---|---|---|---|---|---|---|
1.29 ± 0.05 | 39.06 ± 4.01 | 50.29 ± 6.01 | 9.18 ± 1.53 | 1.54 ± 0.21 | 69.88 ± 6.53 | 14.11 ± 0.85 | 2.64 ± 0.18 | 4.88 ± 0.15 |
木质素 Lignin (mg·g-1) | 纤维素 Cellulose (mg·g-1) | C (mg·g-1) | N (mg·g-1) | P (mg·g-1) | K (mg·g-1) | Ca (mg·g-1) | Mg (mg·g-1) | C/N | N/P | Lignin/N |
---|---|---|---|---|---|---|---|---|---|---|
336.7 ± 3.8 | 240.7 ± 9.3 | 440.3 ± 6.6 | 9.11 ± 0.10 | 0.27 ± 0.01 | 7.15 ± 0.25 | 0.58 ± 0.01 | 1.90 ± 0.09 | 48.3 ± 0.8 | 33.7 ± 0.5 | 37.0 ± 1.5 |
Table 2 Initial chemical properties of Betula luminifera leaf litter (mean ± SE)
木质素 Lignin (mg·g-1) | 纤维素 Cellulose (mg·g-1) | C (mg·g-1) | N (mg·g-1) | P (mg·g-1) | K (mg·g-1) | Ca (mg·g-1) | Mg (mg·g-1) | C/N | N/P | Lignin/N |
---|---|---|---|---|---|---|---|---|---|---|
336.7 ± 3.8 | 240.7 ± 9.3 | 440.3 ± 6.6 | 9.11 ± 0.10 | 0.27 ± 0.01 | 7.15 ± 0.25 | 0.58 ± 0.01 | 1.90 ± 0.09 | 48.3 ± 0.8 | 33.7 ± 0.5 | 37.0 ± 1.5 |
Fig. 1 Variations of mass remaining of Betula luminifera leaf litter during decomposition (mean ± SE, n = 3). Italic texts indicate that time effect, nitrogen effect and interaction effect are significant in repeated measures ANOVA. LN, MN and HN marked at each sampling date indicate significant differences at p < 0.05 between control and the levels of experimental N inputs (LN, low-N (5 g N·m-2·a-1); MN, medium-N (15 g N·m-2·a-1); HN, high-N (30 g N·m-2·a-1)), respectively.
处理 Treatment | 拟合参数 Fitting parameter a | 分解系数 Decomposition coefficient k | 决定系数 Determination coefficient R2 | p | n | 分解50%时间 T50% (a) | 分解95%时间 T95% (a) |
---|---|---|---|---|---|---|---|
对照 Control (0 g N·m-2·a-1) | 102.4 | 1.13 | 0.97 | < 0.001 | 7 | 0.61 | 2.65 |
低氮 Low nitrogen (5 g N·m-2·a-1) | 94.9 | 0.79 | 0.94 | < 0.001 | 7 | 0.88 | 3.79 |
中氮 Medium nitrogen (15 g N·m-2·a-1) | 96.4 | 0.70 | 0.97 | < 0.001 | 7 | 0.99 | 4.28 |
高氮 High nitrogen (30 g N·m-2·a-1) | 97.6 | 0.65 | 0.97 | < 0.001 | 7 | 1.07 | 4.61 |
Table 3 Models (y = ae-kx) for the relationship between mass remaining (y, %) of Betula luminifera leaf litter and time (x, a)
处理 Treatment | 拟合参数 Fitting parameter a | 分解系数 Decomposition coefficient k | 决定系数 Determination coefficient R2 | p | n | 分解50%时间 T50% (a) | 分解95%时间 T95% (a) |
---|---|---|---|---|---|---|---|
对照 Control (0 g N·m-2·a-1) | 102.4 | 1.13 | 0.97 | < 0.001 | 7 | 0.61 | 2.65 |
低氮 Low nitrogen (5 g N·m-2·a-1) | 94.9 | 0.79 | 0.94 | < 0.001 | 7 | 0.88 | 3.79 |
中氮 Medium nitrogen (15 g N·m-2·a-1) | 96.4 | 0.70 | 0.97 | < 0.001 | 7 | 0.99 | 4.28 |
高氮 High nitrogen (30 g N·m-2·a-1) | 97.6 | 0.65 | 0.97 | < 0.001 | 7 | 1.07 | 4.61 |
Fig. 2 Variations of mass remaining of lignin and cellulose of Betula luminifera leaf litter during decomposition (mean ± SE, n = 3). Italic texts indicate that time effect, nitrogen effect and interaction effect are significant in repeated measures ANOVA. LN, MN and HN marked at each sampling date indicate significant differences at p < 0.05 between control and the levels of experimental N inputs (LN, low-N (5 g N·m-2·a-1); MN, medium-N (15 g N·m-2·a-1); HN, high-N (30 g N·m-2·a-1)), respectively.
Fig. 3 Variations of remaining of C, N, P, K, Ca, and Mg of Betula luminifera leaf litter during decomposition (mean ± SE, n = 3). Italic texts indicate that time effect, nitrogen effect and interaction effect are significant in repeated measures ANOVA. LN, MN and HN marked at each sampling date indicate significant differences at p < 0.05 between control and the levels of experimental N inputs (LN, low-N (5 g N·m-2·a-1); MN, medium-N (15 g N·m-2·a-1); HN, high-N (30 g N·m-2·a-1)), respectively.
树种 Tree species | 初始N含量 Initial N concentration (mg·g-1) | 初始C/N Initial C/N | 最初2个月N动态 N dynamics in the first two months | N沉降效应 N deposition effect | 研究时间 Study time (a) | 参考文献 Reference |
---|---|---|---|---|---|---|
苦竹 Pleioblastus amarus | 3.9 | 100.0 | 富集 Enrich | 抑制 Inhibition | 2 | |
亮叶桦 Betula luminifera | 9.1 | 48.3 | 微弱富集 Gently enrich | 抑制 Inhibition | 1 | 本研究 This study |
巨桉 Eucalyptus grandis | 11.6 | 39.0 | 微弱富集 Gently enrich | 抑制 Inhibition | 2 | |
撑绿杂交竹 Bambusa pervariabilis × Dendrocala mopsi | 13.1 | 28.6 | 释放 Release | 抑制 Inhibition | 2 | |
慈竹 Neosinocalamus affinis | 22.3 | 20.5 | 释放 Release | 微弱促进 Gently stimulation | 1 |
Table 4 Comparison of effects of simulated N deposition on decomposition of leaf litter from several tree species, in the Rainy Area of West China
树种 Tree species | 初始N含量 Initial N concentration (mg·g-1) | 初始C/N Initial C/N | 最初2个月N动态 N dynamics in the first two months | N沉降效应 N deposition effect | 研究时间 Study time (a) | 参考文献 Reference |
---|---|---|---|---|---|---|
苦竹 Pleioblastus amarus | 3.9 | 100.0 | 富集 Enrich | 抑制 Inhibition | 2 | |
亮叶桦 Betula luminifera | 9.1 | 48.3 | 微弱富集 Gently enrich | 抑制 Inhibition | 1 | 本研究 This study |
巨桉 Eucalyptus grandis | 11.6 | 39.0 | 微弱富集 Gently enrich | 抑制 Inhibition | 2 | |
撑绿杂交竹 Bambusa pervariabilis × Dendrocala mopsi | 13.1 | 28.6 | 释放 Release | 抑制 Inhibition | 2 | |
慈竹 Neosinocalamus affinis | 22.3 | 20.5 | 释放 Release | 微弱促进 Gently stimulation | 1 |
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