Chin J Plant Ecol ›› 2018, Vol. 42 ›› Issue (3): 349-360.DOI: 10.17521/cjpe.2016.0083
Special Issue: 生态系统碳水能量通量; 凋落物
• Research Articles • Previous Articles Next Articles
ZHANG Su-Yan1,2,JIANG Hong-Zhi2,WANG Yang2,ZHANG Yan-Jie1,LU Shun-Bao1,2,*(),BAI Yong-Fei2
Online:
2018-03-20
Published:
2017-06-16
Contact:
Shun-Bao LU ORCID:0000-0003-3557-7777
Supported by:
ZHANG Su-Yan, JIANG Hong-Zhi, WANG Yang, ZHANG Yan-Jie, LU Shun-Bao, BAI Yong-Fei. Effects of litter removal and addition on ecosystem carbon fluxes in a typical steppe[J]. Chin J Plant Ecol, 2018, 42(3): 349-360.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2016.0083
处理 Treatment | 2013 | 2014 |
---|---|---|
对照 Control | 0 | 0 |
剪碎凋落物, 不移除0, litter cut but not removed | 0 | 0 |
凋落物去除50% 50% litter removal | 333 | 61 |
凋落物去除100% 100% litter removal | 667 | 122 |
Table 1 The amounts (g·m-2) of litter removal under different treatments in the mature community in 2013 and 2014
处理 Treatment | 2013 | 2014 |
---|---|---|
对照 Control | 0 | 0 |
剪碎凋落物, 不移除0, litter cut but not removed | 0 | 0 |
凋落物去除50% 50% litter removal | 333 | 61 |
凋落物去除100% 100% litter removal | 667 | 122 |
处理 Treatment | 2013 | 2014 |
---|---|---|
对照 Control | 0 | 0 |
凋落物添加50% 50% litter addition | 333 | 61 |
凋落物添加100% 100% litter addition | 667 | 122 |
Table 2 The amounts (g·m-2) of litter addition under different treatments in the degraded community in 2013 and 2014
处理 Treatment | 2013 | 2014 |
---|---|---|
对照 Control | 0 | 0 |
凋落物添加50% 50% litter addition | 333 | 61 |
凋落物添加100% 100% litter addition | 667 | 122 |
Fig. 2 Effects of litter removal in the mature community and litter addition in the degraded community on soil temperature and soil moisture in 2014 and 2015 (mean ± SE). Different small letters a, b and c indicate significant differences among treatments in the same community (p < 0.05). ns indicates no significant differences among treatments (p > 0.05). -50%, litter removal of 50%; -100%, litter removal of 100%; +50%, 50% litter addition; +100%, 100% litter addition.
Fig. 3 Effects of litter removal in the mature community and litter addition in the degraded community on aboveground biomass (mean ± SE). Different small letters a and b indicate significant differences among treatments in the same community (p < 0.05). ns indicates no significant differences among treatments (p > 0.05). -50%, litter removal of 50%; -100%, litter removal of 100%; +50%, 50% litter addition; +100%, 100% litter addition.
指标 Index | 因素 Factor | 自由度 Degree of freedom | p值 p value | |
---|---|---|---|---|
成熟群落 Mature community | 退化群落 Degraded community | |||
GEP | 时间 Time | 5 | 0.000**** | 0.000**** |
处理 Treatment | 2 | 0.132 | 0.037* | |
时间×处理 Time × treatment | 10 | 0.000**** | 0.000**** | |
ER | 时间 time | 5 | 0.000**** | 0.000**** |
处理 Treatment | 2 | 0.605 | 0.709 | |
时间×处理 Time × treatment | 10 | 0.047* | 0.189 | |
NEE | 时间 Time | 5 | 0.000**** | 0.000**** |
处理 Treatment | 2 | 0.008** | 0.018* | |
时间×处理 Time × treatment | 10 | 0.000**** | 0.013* |
Table 3 Effects of litter removal and addition on gross ecosystem productivity (GEP), ecosystem respiration (ER) and net ecosystem CO2 exchange (NEE) based on repeated measures ANOVA
指标 Index | 因素 Factor | 自由度 Degree of freedom | p值 p value | |
---|---|---|---|---|
成熟群落 Mature community | 退化群落 Degraded community | |||
GEP | 时间 Time | 5 | 0.000**** | 0.000**** |
处理 Treatment | 2 | 0.132 | 0.037* | |
时间×处理 Time × treatment | 10 | 0.000**** | 0.000**** | |
ER | 时间 time | 5 | 0.000**** | 0.000**** |
处理 Treatment | 2 | 0.605 | 0.709 | |
时间×处理 Time × treatment | 10 | 0.047* | 0.189 | |
NEE | 时间 Time | 5 | 0.000**** | 0.000**** |
处理 Treatment | 2 | 0.008** | 0.018* | |
时间×处理 Time × treatment | 10 | 0.000**** | 0.013* |
Fig. 4 Seasonal dynamics of net ecosystem CO2 exchange (NEE), ecosystem respiration (ER) and gross ecosystem productivity (GEP) under litter removal and addition treatments in the two communities. Different small letters a, b, and c indicate significant differences among treatments (p < 0.05). ns indicates no significant difference among treatments (p > 0.05). -50%, litter removal of 50%; -100%, litter removal of 100%; +50%, 50% litter addition; +100%, 100% litter addition.
Fig. 5 Correlation analysis of the two communitiess of net ecosystem CO2 exchange (NEE), ecosystem respiration (ER) and gross ecosystem productivity (GEP) and soil temperature under litter removal and addition treatments. -50%, litter removal of 50%; -100%, litter removal of 100%; +50%, 50% litter addition; +100%, 100% litter addition.
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