Chin J Plant Ecol ›› 2014, Vol. 38 ›› Issue (2): 103-115.DOI: 10.3724/SP.J.1258.2014.00010
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BAI Xue1,2, CHENG Jun-Hui1,2, ZHENG Shu-Xia1, ZHAN Shu-Xia1,2, BAI Yong-Fei1,*()
Received:
2013-05-07
Accepted:
2013-12-11
Online:
2014-05-07
Published:
2014-02-12
Contact:
BAI Yong-Fei
About author:
* (E-mail: yfbai@ibcas.ac.cn)BAI Xue, CHENG Jun-Hui, ZHENG Shu-Xia, ZHAN Shu-Xia, BAI Yong-Fei. Ecophysiological responses of Leymus chinensis to nitrogen and phosphorus additions in a typical steppe[J]. Chin J Plant Ecol, 2014, 38(2): 103-115.
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因素 Factor | df | 群落特征和植物功能性状 Community characteristics and plant functional traits | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
群落地上净生产力和 羊草种群特征 ANPP and population traits of L. chinensis | ANPP | PB | PD | RAB | ||||||
处理 Treatment (T) | 3 | <0.000 1 | 0.788 | 0.505 | 0.373 | |||||
年份 Year (Y) | 1 | 0.001 | <0.000 1 | <0.000 1 | <0.000 1 | |||||
T × Y | 3 | 0.278 | 0.493 | 0.828 | 0.980 | |||||
羊草形态性状 Morphological traits of L. chinensis | IB | LB | SB | SLR | SLA | LA | LM | |||
处理 Treatment (T) | 3 | 0.069 | 0.075 | 0.114 | 0.701 | 0.144 | 0.007 | 0.069 | ||
年份 Year (Y) | 1 | 0.885 | 0.203 | 0.106 | 0.001 | 0.066 | 0.993 | 0.885 | ||
T × Y | 3 | 0.140 | 0.234 | 0.073 | 0.368 | 0.649 | 0.539 | 0.140 | ||
羊草生理性状 Physiological traits of L. chinensis | N | P | Pn | Tr | Gs | Ci | WUE | Ls | ||
处理 Treatment (T) | 3 | <0.000 1 | <0.000 1 | 0.117 | 0.085 | 0.293 | 0.731 | 0.282 | ||
年份 Year (Y) | 1 | 0.817 | 0.001 | 0.980 | 0.135 | <0.000 1 | <0.000 1 | 0.279 | <0.000 1 | |
T × Y | 3 | 0.871 | 0.001 | 0.667 | 0.626 | 0.930 | 0.612 | 0.079 | 0.656 |
Table 1 Effects of N and P additions and year on community aboveground net primary productivity, population traits and plant functional traits of Leymus chinensis
因素 Factor | df | 群落特征和植物功能性状 Community characteristics and plant functional traits | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
群落地上净生产力和 羊草种群特征 ANPP and population traits of L. chinensis | ANPP | PB | PD | RAB | ||||||
处理 Treatment (T) | 3 | <0.000 1 | 0.788 | 0.505 | 0.373 | |||||
年份 Year (Y) | 1 | 0.001 | <0.000 1 | <0.000 1 | <0.000 1 | |||||
T × Y | 3 | 0.278 | 0.493 | 0.828 | 0.980 | |||||
羊草形态性状 Morphological traits of L. chinensis | IB | LB | SB | SLR | SLA | LA | LM | |||
处理 Treatment (T) | 3 | 0.069 | 0.075 | 0.114 | 0.701 | 0.144 | 0.007 | 0.069 | ||
年份 Year (Y) | 1 | 0.885 | 0.203 | 0.106 | 0.001 | 0.066 | 0.993 | 0.885 | ||
T × Y | 3 | 0.140 | 0.234 | 0.073 | 0.368 | 0.649 | 0.539 | 0.140 | ||
羊草生理性状 Physiological traits of L. chinensis | N | P | Pn | Tr | Gs | Ci | WUE | Ls | ||
处理 Treatment (T) | 3 | <0.000 1 | <0.000 1 | 0.117 | 0.085 | 0.293 | 0.731 | 0.282 | ||
年份 Year (Y) | 1 | 0.817 | 0.001 | 0.980 | 0.135 | <0.000 1 | <0.000 1 | 0.279 | <0.000 1 | |
T × Y | 3 | 0.871 | 0.001 | 0.667 | 0.626 | 0.930 | 0.612 | 0.079 | 0.656 |
Fig. 2 Effects of N and P additions on aboveground net primary productivity (ANPP), population biomass, density, and relative biomass of Leymus chinensis (mean ± SE, n = 5). CK, control; N, N addition; P, P addition; N + P, N and P additions. Different lower-case letters indicate significant differences among treatments (p < 0.05); NS indicates non-significant difference among treatments (p > 0.05).
Fig. 3 The whole-plant traits of Leymus chinensis in response to N and P additions (mean ± SE, n = 9). CK, control; N, N addition; P, P addition; N + P, N and P additions. Different lower-case letters indicate significant differences among treatments (p < 0.05). NS indicates non-significant difference among treatments (p > 0.05).
Fig. 4 Leaf morphological traits of Leymus chinensis in response to N and P additions (mean ± SE, n = 9). CK, control; N, N addition; P, P addition; N + P, N and P additions. Different lower-case letters indicate significant differences among treatments (p < 0.05). NS indicates non-significant difference among treatments (p > 0.05).
Fig. 5 Responses of leaf N and P contents to N and P additions of Leymus chinensis (mean ± SE, n = 9). CK, control; N, N addition; P, P addition; N + P, N and P additions. Different lower-case letters indicate significant differences among treatments (p < 0.05).
Fig. 6 Relationships of individual biomass response ratio with the response ratios of specific leaf area (SLA) (A) and photosynthetic yield (B) of Leymus chinensis. N, N addition; P, P addition; N + P, N and P additions. Sampling size (n) = 9.
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