Chin J Plant Ecol ›› 2019, Vol. 43 ›› Issue (1): 46-54.DOI: 10.17521/cjpe.2018.0100
Special Issue: 生态化学计量
• Research Articles • Previous Articles Next Articles
NING Zhi-Ying1,2,LI Yu-Lin1,*(),YANG Hong-Ling1,2,ZHANG Zi-Qian1,2
Received:
2018-05-04
Accepted:
2018-12-24
Online:
2019-01-20
Published:
2019-04-23
Contact:
LI Yu-Lin
Supported by:
NING Zhi-Ying, LI Yu-Lin, YANG Hong-Ling, ZHANG Zi-Qian. Nitrogen and phosphorus stoichiometric homoeostasis in leaves of dominant sand-fixing shrubs in Horqin Sandy Land, China[J]. Chin J Plant Ecol, 2019, 43(1): 46-54.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2018.0100
物种 Species | 指标 Index | 算数平均值 Arithmetic average | 中位数 Median | 众数 Mode | 变异系数 Coefficient of variation(%) | 极小值 Minimum value | 极大值 Maximum value |
---|---|---|---|---|---|---|---|
盐蒿 A. halodendron | N (g·kg-1) | 23.24 ± 0.49 | 24.50 | 27.00 | 18.71 | 15.00 | 31.40 |
P (g·kg-1) | 3.80 ± 0.05 | 3.82 | 3.67 | 11.05 | 2.86 | 4.53 | |
N:P | 6.10 ± 0.10 | 6.17 | 5.59 | 14.43 | 4.02 | 7.82 | |
小叶锦鸡儿 C. microphylla | N (g·kg-1) | 30.44 ± 0.46 | 31.00 | 30.40 | 13.24 | 18.20 | 37.90 |
P (g·kg-1) | 1.96 ± 0.04 | 1.97 | 1.97 | 17.86 | 1.24 | 2.69 | |
N:P | 15.86 ± 0.29 | 15.71 | 11.28 | 15.82 | 11.28 | 24.33 |
Table 1 Nitrogen (N) and phosphorus (P) concentrations and their ratios in leaves of Artemisia halodendron and Caragana microphylla in Horqin Sandy Land (mean ± SE)
物种 Species | 指标 Index | 算数平均值 Arithmetic average | 中位数 Median | 众数 Mode | 变异系数 Coefficient of variation(%) | 极小值 Minimum value | 极大值 Maximum value |
---|---|---|---|---|---|---|---|
盐蒿 A. halodendron | N (g·kg-1) | 23.24 ± 0.49 | 24.50 | 27.00 | 18.71 | 15.00 | 31.40 |
P (g·kg-1) | 3.80 ± 0.05 | 3.82 | 3.67 | 11.05 | 2.86 | 4.53 | |
N:P | 6.10 ± 0.10 | 6.17 | 5.59 | 14.43 | 4.02 | 7.82 | |
小叶锦鸡儿 C. microphylla | N (g·kg-1) | 30.44 ± 0.46 | 31.00 | 30.40 | 13.24 | 18.20 | 37.90 |
P (g·kg-1) | 1.96 ± 0.04 | 1.97 | 1.97 | 17.86 | 1.24 | 2.69 | |
N:P | 15.86 ± 0.29 | 15.71 | 11.28 | 15.82 | 11.28 | 24.33 |
Fig. 1 Comparisons of leaf nitrogen (N) and phosphorus (P) stoichiometry between Artemisia halodendron and Caragana microphylla in Horqin Sandy Land. Differences between Artemisia halodendron and Caragana microphylla are significant at p < 0.001. Vertical bars represent standard errors. Ar, Artemisia halodendron; Ca, Caragana microphylla.
物种 Species | 指标 Index | 算数平均值 Arithmetic average | 中位数 Median | 众数 Mode | 变异系数 Coefficient of variation(%) | 极小值 Minimum value | 极大值 Maximum value |
---|---|---|---|---|---|---|---|
盐蒿 A. halodendron | N (g·kg-1) | 0.15 ± 0.01 | 0.14 | 0.17* | 57.14 | 0.01 | 0.38 |
P (g·kg-1) | 0.05 ± 0.00 | 0.05 | 0.03* | 60.00 | 0.00 | 0.11 | |
N:P | 3.10 ± 0.26 | 2.38 | 0.43 | 73.22 | 0.43 | 12.10 | |
速效 N Available N (mg·kg-1) | 15.77 ± 1.00 | 16.20 | 21.60 | 56.04 | 1.17 | 38.00 | |
速效 P Available P (mg·kg-1) | 7.82 ± 0.57 | 6.80 | 9.80 | 64.32 | 1.28 | 20.06 | |
速效 N:P Available N:P | 2.27 ± 0.12 | 2.20 | 3.60 | 46.70 | 0.59 | 5.77 | |
小叶锦鸡儿 C. microphylla | N (g·kg-1) | 0.23 ± 0.02 | 0.21 | 0.02 | 69.56 | 0.02 | 0.65 |
P (g·kg-1) | 0.08 ± 0.01 | 0.07 | 0.03 | 62.50 | 0.01 | 0.19 | |
N:P | 3.08 ± 0.21 | 2.87 | 0.76 | 61.04 | 0.76 | 11.99 | |
速效 N Available N (mg·kg-1) | 19.38 ± 1.08 | 16.88 | 9.43* | 48.81 | 7.39 | 44.86 | |
速效 P Available P (mg·kg-1) | 9.74 ± 0.55 | 8.60 | 6.10* | 49.90 | 2.93 | 24.80 | |
速效 N:P Available N:P | 2.11 ± 0.07 | 2.11 | 0.35* | 27.49 | 0.35 | 3.91 |
Table 2 Nitrogen (N) and phosphorus (P) stoichiometry in soils beneath Artemisia halodendron and Caragana microphylla in Horqin Sandy Land (mean ± SE)
物种 Species | 指标 Index | 算数平均值 Arithmetic average | 中位数 Median | 众数 Mode | 变异系数 Coefficient of variation(%) | 极小值 Minimum value | 极大值 Maximum value |
---|---|---|---|---|---|---|---|
盐蒿 A. halodendron | N (g·kg-1) | 0.15 ± 0.01 | 0.14 | 0.17* | 57.14 | 0.01 | 0.38 |
P (g·kg-1) | 0.05 ± 0.00 | 0.05 | 0.03* | 60.00 | 0.00 | 0.11 | |
N:P | 3.10 ± 0.26 | 2.38 | 0.43 | 73.22 | 0.43 | 12.10 | |
速效 N Available N (mg·kg-1) | 15.77 ± 1.00 | 16.20 | 21.60 | 56.04 | 1.17 | 38.00 | |
速效 P Available P (mg·kg-1) | 7.82 ± 0.57 | 6.80 | 9.80 | 64.32 | 1.28 | 20.06 | |
速效 N:P Available N:P | 2.27 ± 0.12 | 2.20 | 3.60 | 46.70 | 0.59 | 5.77 | |
小叶锦鸡儿 C. microphylla | N (g·kg-1) | 0.23 ± 0.02 | 0.21 | 0.02 | 69.56 | 0.02 | 0.65 |
P (g·kg-1) | 0.08 ± 0.01 | 0.07 | 0.03 | 62.50 | 0.01 | 0.19 | |
N:P | 3.08 ± 0.21 | 2.87 | 0.76 | 61.04 | 0.76 | 11.99 | |
速效 N Available N (mg·kg-1) | 19.38 ± 1.08 | 16.88 | 9.43* | 48.81 | 7.39 | 44.86 | |
速效 P Available P (mg·kg-1) | 9.74 ± 0.55 | 8.60 | 6.10* | 49.90 | 2.93 | 24.80 | |
速效 N:P Available N:P | 2.11 ± 0.07 | 2.11 | 0.35* | 27.49 | 0.35 | 3.91 |
Fig. 2 Comparisons of soil nitrogen (N) and phosphorus (P) stoichiometry between Artemisia halodendron and Caragana microphylla in Horqin Sandy Land. Differences between Artemisia halodendron and Caragana microphylla are significant at p < 0.001. Vertical bars represent standard errors. Ar, Artemisia halodendron; Ca, Caragana microphylla.
Fig. 3 Relationships of leaf N, P, and N:P with soil N, P, and N:P in two dominant shrubs in Horqin Sandy Land. H, stoichiometric homoeostasis indexes.
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