植物生态学报 ›› 2010, Vol. 34 ›› Issue (8): 907-914.DOI: 10.3773/j.issn.1005-264x.2010.08.003
王静1, 赵萌莉1,*(), Walter WILLMS2, 王忠武1, 韩国栋1
收稿日期:
2009-09-02
接受日期:
2010-06-01
出版日期:
2010-09-02
发布日期:
2010-09-28
通讯作者:
赵萌莉
作者简介:
* E-mail: menglizhao@yahoo.com
WANG Jing1, ZHAO Meng-Li1,*(), Walter WILLMS2, WANG Zhong-Wu1, HAN Guo-Dong1
Received:
2009-09-02
Accepted:
2010-06-01
Online:
2010-09-02
Published:
2010-09-28
Contact:
ZHAO Meng-Li
摘要:
通过连续5年对退化草地进行凋落物添加处理, 分析不同处理强度植物群落动态, 探讨凋落物对草地地上和不同功能群生产力的影响。结果表明: 凋落物添加对草地地上生产力有显著的促进作用, 草地地上生产力随着凋落物添加强度的增加而变化不大。处理效应主要表现在处理后第一年, 重度处理与对照有极显著差异(p < 0.05), 以后几年差异不显著(p > 0.05), 年度间差异极显著(p < 0.001)。凋落物添加对植物群落各功能群生产力无显著影响。年度间不同处理各功能群相对生物量随年际变化的主成分分析(PCA)结果说明: 草地生产力主要是由多年生丛生型禾草与多年生杂类草在生态系统中的竞争补偿作用决定的, 随着凋落物添加强度的增加, 二者的竞争作用减弱, 相关性下降, 多年生丛生型禾草占更大优势, 预示着多年生杂类草与一二年生草本、灌木、多年生根茎型禾草的竞争补偿作用增大。
王静, 赵萌莉, Walter WILLMS, 王忠武, 韩国栋. 内蒙古典型草原不同功能群生产力对凋落物添加的响应. 植物生态学报, 2010, 34(8): 907-914. DOI: 10.3773/j.issn.1005-264x.2010.08.003
WANG Jing, ZHAO Meng-Li, Walter WILLMS, WANG Zhong-Wu, HAN Guo-Dong. Productivity responses of different functional groups to litter addition in typical grassland of Inner Mongolia. Chinese Journal of Plant Ecology, 2010, 34(8): 907-914. DOI: 10.3773/j.issn.1005-264x.2010.08.003
图1 2003-2007年不同凋落物添加处理的地上生物量。 C, 对照; M, 中度处理; H, 重度处理。图中不同字母表示同一年不同处理间在p < 0.05水平上差异显著。
Fig. 1 Aboveground biomass under different litter addition treatments from 2003 to 2007. C, control; M, medium treatment; H, heavy treatment. Different letters in the figure indicate the significant difference at p < 0.05 level.
作用因素 Factor | 地上生物量 Aboveground biomass | 灌木和小半灌木 SS | 多年生丛生型禾草 PB | 多年生杂类草 PF | 多年生根茎型禾草 PR | 一二年生草本 AB |
---|---|---|---|---|---|---|
年 Year① | 32.69*** | 1.60NS | 17.39*** | 7.45*** | 17.85*** | 33.20*** |
处理 Treatment② | 8.16** | 2.34NS | 2.34NS | 1.35NS | 0.40NS | 2.35NS |
年×处理 Year × treatment③ | 3.22** | 1.88NS | 0.80NS | 1.36NS | 0.84NS | 3.57*** |
表1 凋落物添加强度、年份对地上生物量和不同功能群生产力及其交互作用的单因素方差分析(F值)结果
Table 1 Results (F values) of one-way ANOVA test on the effects of litter addition intensity, year and their interactions on aboveground biomass of total plant community and different functional groups
作用因素 Factor | 地上生物量 Aboveground biomass | 灌木和小半灌木 SS | 多年生丛生型禾草 PB | 多年生杂类草 PF | 多年生根茎型禾草 PR | 一二年生草本 AB |
---|---|---|---|---|---|---|
年 Year① | 32.69*** | 1.60NS | 17.39*** | 7.45*** | 17.85*** | 33.20*** |
处理 Treatment② | 8.16** | 2.34NS | 2.34NS | 1.35NS | 0.40NS | 2.35NS |
年×处理 Year × treatment③ | 3.22** | 1.88NS | 0.80NS | 1.36NS | 0.84NS | 3.57*** |
功能群 Functional groups | 2003 | 2004 | 2005 | 2006 | 2007 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
C | M | H | C | M | H | C | M | H | C | M | H | C | M | H | |
AB | 15.67b | 29.37b | 21.10b | 9.18bc | 2.84b | 6.90b | 0.00b | 0.00c | 0.00c | 3.01c | 7.52b | 13.25b | 0.00c | 8.55bc | 2.46c |
PB | 65.34a | 50.26a | 48.23a | 28.32ab | 37.85a | 34.24a | 82.08a | 78.86a | 74.06a | 34.72b | 39.07a | 49.47a | 66.47a | 53.46a | 71.25a |
PF | 18.99b | 20.37b | 10.22bc | 45.16a | 33.89a | 19.41ab | 8.91b | 13.13b | 20.39b | 57.78a | 39.24a | 34.92a | 25.24b | 27.29ab | 20.06b |
PR | 0.00c | 0.00c | 0.00c | 16.79abc | 21.42ab | 31.66a | 10.30b | 6.66bc | 5.55c | 4.01c | 4.50b | 2.36b | 8.30bc | 10.70abc | 6.22c |
SS | 0.00c | 0.00c | 20.45bc | 0.55c | 4.00b | 7.79b | 0.00b | 1.35bc | 0.00c | 0.48c | 9.67b | 0.00b | 0.00c | 0.00c | 0.00c |
表2 不同功能群植物相对生物量在同一年同一处理下的单因素方差分析(2003-2007年)
Table 2 One-way ANOVA results (F values) of effects on relative biomass of different functional groups in the same year and the same treatment from 2003 to 2007
功能群 Functional groups | 2003 | 2004 | 2005 | 2006 | 2007 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
C | M | H | C | M | H | C | M | H | C | M | H | C | M | H | |
AB | 15.67b | 29.37b | 21.10b | 9.18bc | 2.84b | 6.90b | 0.00b | 0.00c | 0.00c | 3.01c | 7.52b | 13.25b | 0.00c | 8.55bc | 2.46c |
PB | 65.34a | 50.26a | 48.23a | 28.32ab | 37.85a | 34.24a | 82.08a | 78.86a | 74.06a | 34.72b | 39.07a | 49.47a | 66.47a | 53.46a | 71.25a |
PF | 18.99b | 20.37b | 10.22bc | 45.16a | 33.89a | 19.41ab | 8.91b | 13.13b | 20.39b | 57.78a | 39.24a | 34.92a | 25.24b | 27.29ab | 20.06b |
PR | 0.00c | 0.00c | 0.00c | 16.79abc | 21.42ab | 31.66a | 10.30b | 6.66bc | 5.55c | 4.01c | 4.50b | 2.36b | 8.30bc | 10.70abc | 6.22c |
SS | 0.00c | 0.00c | 20.45bc | 0.55c | 4.00b | 7.79b | 0.00b | 1.35bc | 0.00c | 0.48c | 9.67b | 0.00b | 0.00c | 0.00c | 0.00c |
图4 不同处理功能群相对生物量的主成分分析。 C、M、H同图1。AB、PB、PF、PR、SS同表1。
Fig. 4 Principal component analysis (PCA) of relative biomass of different functional groups in different treatments. C, M and H are the same as in Fig. 1. AB, PB, PF, PR and SS are the same as in Table 1.
图5 不同凋落物添加对多年生丛生禾草与多年生杂类草的相关分析。 C、M、H同图1。
Fig. 5 Correlation analysis between perennial bunch grass and perennial forbs in different litter addition treatments. C, M and H are the same as in Fig. 1.
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