Chin J Plant Ecol ›› 2014, Vol. 38 ›› Issue (3): 231-237.DOI: 10.3724/SP.J.1258.2014.00020
Special Issue: 生态化学计量; 青藏高原植物生态学:生态系统生态学
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BIN Zhen-Jun1, WANG Jing-Jing1, ZHANG Wen-Peng1, XU Dang-Hui1,*(), CHENG Xue-Han1, LI Ke-Jie2, CAO De-Hao2
Received:
2013-10-23
Accepted:
2013-12-09
Online:
2014-10-23
Published:
2014-02-27
Contact:
XU Dang-Hui
BIN Zhen-Jun, WANG Jing-Jing, ZHANG Wen-Peng, XU Dang-Hui, CHENG Xue-Han, LI Ke-Jie, CAO De-Hao. Effects of N addition on ecological stoichiometric characteristics in six dominant plant species of alpine meadow on the Qinghai-Xizang Plateau, China[J]. Chin J Plant Ecol, 2014, 38(3): 231-237.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2014.00020
土层 Soil layer (cm) | 有机质 Organic matter (g·kg-1) | 全氮 Total nitrogen (g·kg-1) | 全磷 Total phosphorus (g·kg-1) | pH |
---|---|---|---|---|
0-15 | 70.5 | 3.72 | 0.984 | 6.33 |
15-30 | 36.3 | 1.95 | 0.712 | 6.44 |
30-45 | 24.0 | 1.23 | 0.618 | 6.63 |
Table 1 Soil nutrient status before N addition
土层 Soil layer (cm) | 有机质 Organic matter (g·kg-1) | 全氮 Total nitrogen (g·kg-1) | 全磷 Total phosphorus (g·kg-1) | pH |
---|---|---|---|---|
0-15 | 70.5 | 3.72 | 0.984 | 6.33 |
15-30 | 36.3 | 1.95 | 0.712 | 6.44 |
30-45 | 24.0 | 1.23 | 0.618 | 6.63 |
元素 Element | 处理 Treatment | 草玉梅 Anemone rivularis | 甘肃马先蒿Pedicularis kansuensis | 莓叶委陵菜 Potentilla ragarioides | 黄花棘豆 Oxytropis ochrocephala | 垂穗披碱草 Elymus nutans | 嵩草 Kobresia myosuroides |
---|---|---|---|---|---|---|---|
C | N0 | 431 ± 14.931a | 464 ± 2.480a | 442 ± 3.724a | 467 ± 1.424a | 459 ± 5.314a | 461 ± 4.993a |
N1 | 438 ± 15.271a | 466 ± 3.954a | 451 ± 6.083a | 468 ± 3.143a | 460 ± 10.902a | 453 ± 3.444a | |
N2 | 440 ± 12.064a | 465 ± 6.991a | 456 ± 11.410a | 471 ± 4.913a | 461 ± 11.675a | 463 ± 3.652a | |
N3 | 445 ± 10.442a | 467 ± 3.992a | 452 ± 13.700a | 461 ± 4.393a | 463 ± 10.904a | 467 ± 6.454a | |
N | N0 | 16.5 ± 1.094a | 17.3 ± 2.087a | 18.1 ± 1.131a | 24.5 ± 1.113a | 16.7 ± 0.036a | 11.5 ± 0.188a |
N1 | 18.9 ± 1.298b | 21.1 ± 2.094b | 25.7 ± 2.74b | 22.6 ± 1.190a | 21.2 ± 0.166b | 15.8 ± 0.211b | |
N2 | 24.1 ± 2.127c | 26.0 ± 1.158c | 29.7 ± 2.144c | 26.8 ± 1.114a | 26.3 ± 0.122c | 18.8 ± 0.212c | |
N3 | 32.5 ± 2.169d | 32.2 ± 2.087d | 36.7 ± 1.081d | 23.1 ± 1.124a | 31.0 ± 0.366d | 22.8 ± 0.211d | |
P | N0 | 1.716 ± 0.077a | 1.636 ± 0.053a | 1.672 ± 0.083a | 2.509 ± 0.089a | 1.488 ± 0.070a | 1.591 ± 0.077a |
N1 | 1.713 ± 0.065a | 1.640 ± 0.070a | 1.682 ± 0.095a | 2.488 ± 0.080a | 1.490 ± 0.081a | 1.575 ± 0.042a | |
N2 | 1.718 ± 0.076a | 1.638 ± 0.063a | 1.668 ± 0.064a | 2.506 ± 0.114a | 1.478 ± 0.067a | 1.555 ± 0.064a | |
N3 | 1.721 ± 0.090a | 1.628 ± 0.075a | 1.679 ± 0.071a | 2.511 ± 0.109a | 1.502 ± 0.070a | 1.585 ± 0.073a |
Table 2 Effects of nitrogen addition on leaf C, N, and P contents (g·kg-1) in six dominant plant species (mean ± SE, n = 6)
元素 Element | 处理 Treatment | 草玉梅 Anemone rivularis | 甘肃马先蒿Pedicularis kansuensis | 莓叶委陵菜 Potentilla ragarioides | 黄花棘豆 Oxytropis ochrocephala | 垂穗披碱草 Elymus nutans | 嵩草 Kobresia myosuroides |
---|---|---|---|---|---|---|---|
C | N0 | 431 ± 14.931a | 464 ± 2.480a | 442 ± 3.724a | 467 ± 1.424a | 459 ± 5.314a | 461 ± 4.993a |
N1 | 438 ± 15.271a | 466 ± 3.954a | 451 ± 6.083a | 468 ± 3.143a | 460 ± 10.902a | 453 ± 3.444a | |
N2 | 440 ± 12.064a | 465 ± 6.991a | 456 ± 11.410a | 471 ± 4.913a | 461 ± 11.675a | 463 ± 3.652a | |
N3 | 445 ± 10.442a | 467 ± 3.992a | 452 ± 13.700a | 461 ± 4.393a | 463 ± 10.904a | 467 ± 6.454a | |
N | N0 | 16.5 ± 1.094a | 17.3 ± 2.087a | 18.1 ± 1.131a | 24.5 ± 1.113a | 16.7 ± 0.036a | 11.5 ± 0.188a |
N1 | 18.9 ± 1.298b | 21.1 ± 2.094b | 25.7 ± 2.74b | 22.6 ± 1.190a | 21.2 ± 0.166b | 15.8 ± 0.211b | |
N2 | 24.1 ± 2.127c | 26.0 ± 1.158c | 29.7 ± 2.144c | 26.8 ± 1.114a | 26.3 ± 0.122c | 18.8 ± 0.212c | |
N3 | 32.5 ± 2.169d | 32.2 ± 2.087d | 36.7 ± 1.081d | 23.1 ± 1.124a | 31.0 ± 0.366d | 22.8 ± 0.211d | |
P | N0 | 1.716 ± 0.077a | 1.636 ± 0.053a | 1.672 ± 0.083a | 2.509 ± 0.089a | 1.488 ± 0.070a | 1.591 ± 0.077a |
N1 | 1.713 ± 0.065a | 1.640 ± 0.070a | 1.682 ± 0.095a | 2.488 ± 0.080a | 1.490 ± 0.081a | 1.575 ± 0.042a | |
N2 | 1.718 ± 0.076a | 1.638 ± 0.063a | 1.668 ± 0.064a | 2.506 ± 0.114a | 1.478 ± 0.067a | 1.555 ± 0.064a | |
N3 | 1.721 ± 0.090a | 1.628 ± 0.075a | 1.679 ± 0.071a | 2.511 ± 0.109a | 1.502 ± 0.070a | 1.585 ± 0.073a |
Fig. 1 Effects of nitrogen (N) addition on leaf C:N in six plant species (mean ± SE, n = 6). N0, N1, N2, and N3 represent the nitrogen addition treatment of 0, 7, 14, and 21 g·m-2, respectively. Different letters indicate significant differences between treatments (p < 0.05). Ar, Anemone rivularis; En, Elymus nutans; Km, Kobresia myosuroides; Oo, Oxytropis ochoocephala; Pk, Pedicularis kansuensis; Pf, Potentilla fragarioides.
Fig. 2 Effects of nitrogen (N) addition on leaf C:P in six plant species (mean ± SE, n = 6). N0, N1, N2, and N3 represent the nitrogen addition treatment of 0, 7, 14, and 21 g·m-2, respectively. Different letters indicate significant differences between treatments (p < 0.05). Ar, Anemone rivularis; En, Elymus nutans; Km, Kobresia myosuroides; Oo, Oxytropis ochoocephala; Pk, Pedicularis kansuensis; Pf, Potentilla fragarioides.
Fig. 3 Effects of nitrogen (N) addition on leaf N:P in six plant species (mean ± SE, n = 6). N0, N1, N2, and N3 represent the nitrogen addition treatment of 0, 7, 14, and 21 g·m-2, respectively. Different letters indicate significant differences between treatments (p < 0.05). Ar, Anemone rivularis; En, Elymus nutans; Km, Kobresia myosuroides; Oo, Oxytropis ochoocephala; Pk, Pedicularis kansuensis; Pf, Potentilla fragarioides.
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