Chin J Plant Ecol ›› 2021, Vol. 45 ›› Issue (5): 562-572.DOI: 10.17521/cjpe.2020.0279
Special Issue: 青藏高原植物生态学:植物-土壤-微生物
• Research Articles • Previous Articles
LIU Pan1,3, WANG Wen-Ying3,*(), ZHOU Hua-Kun2, MAO Xu-Feng1, LIU Yan-Fang3
Received:
2020-08-12
Accepted:
2020-11-22
Online:
2021-05-20
Published:
2021-04-14
Contact:
WANG Wen-Ying
Supported by:
LIU Pan, WANG Wen-Ying, ZHOU Hua-Kun, MAO Xu-Feng, LIU Yan-Fang. Dynamics of soil soluble nitrogen and plant productivity in artificial pastures on the Qingzang Plateau[J]. Chin J Plant Ecol, 2021, 45(5): 562-572.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2020.0279
Fig. 1 Dynamics of aboveground biomass in artificial pastures on Qingzang Plateau (mean ± SE). 1, Bromus inermis; 2, Elymus sibiricus; 3, E. nutans; 4, Festuca ryloviana; 5, F. sinensis; 6, Poa pratensis var. anceps ‘Qinghai’; 7, Puccinellia tenuiflora; 8, Poa crymophila. Different lowercase letters represent significant differences in aboveground biomass among different species of the same age (p < 0.05).
Fig. 2 Characteristics of the dynamics in soil soluble nitrogen in artificial pastures on the Qingzang Plateau (0-10 cm, mean ± SE). SON, soluble organic nitrogen; STN, soluble total nitrogen.
Fig. 3 Characteristics of the dynamics in soil soluble nitrogen in artificial pastures on the Qingzang Plateau (10-20 cm, mean ± SE). SON, soluble organic nitrogen; STN, soluble total nitrogen.
处理 Treatment | 年龄Age (a) | 0-10 cm土层 0-10 cm soil layer | 10-20 cm土层 10-20 cm soil layer | ||||||
---|---|---|---|---|---|---|---|---|---|
铵态氮/ 可溶性总氮 NH4+-N/STN (%) | 硝态氮/ 可溶性总氮 NO3--N/STN (%) | 无机氮/ 可溶性总氮 IN/STN (%) | 可溶性有机氮/可溶性总氮 SON/STN (%) | 铵态氮/ 可溶性总氮 NH4+-N/STN (%) | 硝态氮/ 可溶性总氮 NO3--N/STN (%) | 无机氮/ 可溶性总氮 IN/STN (%) | 可溶性有机氮/可溶性总氮 SON/STN (%) | ||
无芒雀麦 Bromus inermis | 2 | 8.53 | 18.83 | 27.36 | 72.64 | 10.62 | 34.97 | 45.59 | 54.41 |
3 | 9.22 | 14.06 | 23.28 | 76.72 | 7.76 | 10.95 | 18.71 | 81.29 | |
4 | 21.31 | 29.70 | 51.01 | 48.99 | 16.16 | 32.65 | 48.80 | 51.20 | |
老芒麦 Elymus sibiricus | 2 | 4.11 | 25.46 | 29.58 | 70.42 | 4.02 | 30.94 | 34.96 | 65.04 |
3 | 8.41 | 11.57 | 19.98 | 80.02 | 7.88 | 14.37 | 22.25 | 77.75 | |
4 | 17.34 | 34.52 | 51.85 | 48.15 | 18.68 | 33.57 | 52.25 | 47.75 | |
垂穗披碱草 E. nutans | 2 | 4.76 | 22.10 | 26.86 | 73.14 | 5.59 | 31.63 | 37.22 | 62.78 |
3 | 7.90 | 15.45 | 23.35 | 76.65 | 4.99 | 8.68 | 13.66 | 86.34 | |
4 | 21.61 | 33.28 | 54.89 | 45.11 | 17.63 | 26.96 | 44.59 | 55.41 | |
西北羊茅 Festuca ryloviana | 2 | 3.41 | 21.63 | 25.03 | 74.97 | 3.69 | 34.93 | 38.61 | 61.39 |
3 | 7.30 | 12.14 | 19.44 | 80.56 | 4.80 | 10.28 | 15.08 | 84.92 | |
4 | 22.18 | 30.79 | 52.98 | 47.02 | 19.56 | 25.19 | 44.75 | 55.25 | |
中华羊茅 F. sinensis | 2 | 5.91 | 28.37 | 34.28 | 65.72 | 4.87 | 33.10 | 37.97 | 62.03 |
3 | 5.99 | 16.15 | 22.14 | 77.86 | 5.49 | 11.04 | 16.53 | 83.47 | |
4 | 20.13 | 34.85 | 54.98 | 45.02 | 15.41 | 30.43 | 45.85 | 54.15 | |
青海扁茎早熟禾 Poa pratensis var. anceps ‘Qinghai’ | 2 | 4.06 | 18.54 | 22.59 | 77.41 | 3.09 | 40.42 | 43.51 | 56.49 |
3 | 5.42 | 5.81 | 11.24 | 88.76 | 8.43 | 12.23 | 20.66 | 79.34 | |
4 | 20.12 | 29.03 | 49.16 | 50.84 | 17.48 | 30.74 | 48.23 | 51.77 | |
星星草 Puccinellia tenuiflora | 2 | 4.33 | 27.73 | 32.06 | 67.94 | 4.32 | 33.36 | 37.68 | 62.32 |
3 | 8.18 | 20.37 | 28.55 | 71.45 | 5.74 | 6.08 | 11.82 | 88.18 | |
4 | 21.18 | 32.90 | 54.09 | 45.91 | 18.33 | 29.73 | 48.07 | 51.93 | |
冷地早熟禾 Poa crymophila | 2 | 5.07 | 29.05 | 34.12 | 65.88 | 4.19 | 40.99 | 45.18 | 54.82 |
3 | 7.70 | 8.96 | 16.65 | 83.35 | 3.29 | 14.35 | 17.65 | 82.35 | |
4 | 18.46 | 30.38 | 48.84 | 51.16 | 18.36 | 29.47 | 47.83 | 52.17 |
Table 1 Proportion of soil inorganic nitrogen (IN) and soluble organic nitrogen (SON) in artificial pastures on the Qingzang Plateau
处理 Treatment | 年龄Age (a) | 0-10 cm土层 0-10 cm soil layer | 10-20 cm土层 10-20 cm soil layer | ||||||
---|---|---|---|---|---|---|---|---|---|
铵态氮/ 可溶性总氮 NH4+-N/STN (%) | 硝态氮/ 可溶性总氮 NO3--N/STN (%) | 无机氮/ 可溶性总氮 IN/STN (%) | 可溶性有机氮/可溶性总氮 SON/STN (%) | 铵态氮/ 可溶性总氮 NH4+-N/STN (%) | 硝态氮/ 可溶性总氮 NO3--N/STN (%) | 无机氮/ 可溶性总氮 IN/STN (%) | 可溶性有机氮/可溶性总氮 SON/STN (%) | ||
无芒雀麦 Bromus inermis | 2 | 8.53 | 18.83 | 27.36 | 72.64 | 10.62 | 34.97 | 45.59 | 54.41 |
3 | 9.22 | 14.06 | 23.28 | 76.72 | 7.76 | 10.95 | 18.71 | 81.29 | |
4 | 21.31 | 29.70 | 51.01 | 48.99 | 16.16 | 32.65 | 48.80 | 51.20 | |
老芒麦 Elymus sibiricus | 2 | 4.11 | 25.46 | 29.58 | 70.42 | 4.02 | 30.94 | 34.96 | 65.04 |
3 | 8.41 | 11.57 | 19.98 | 80.02 | 7.88 | 14.37 | 22.25 | 77.75 | |
4 | 17.34 | 34.52 | 51.85 | 48.15 | 18.68 | 33.57 | 52.25 | 47.75 | |
垂穗披碱草 E. nutans | 2 | 4.76 | 22.10 | 26.86 | 73.14 | 5.59 | 31.63 | 37.22 | 62.78 |
3 | 7.90 | 15.45 | 23.35 | 76.65 | 4.99 | 8.68 | 13.66 | 86.34 | |
4 | 21.61 | 33.28 | 54.89 | 45.11 | 17.63 | 26.96 | 44.59 | 55.41 | |
西北羊茅 Festuca ryloviana | 2 | 3.41 | 21.63 | 25.03 | 74.97 | 3.69 | 34.93 | 38.61 | 61.39 |
3 | 7.30 | 12.14 | 19.44 | 80.56 | 4.80 | 10.28 | 15.08 | 84.92 | |
4 | 22.18 | 30.79 | 52.98 | 47.02 | 19.56 | 25.19 | 44.75 | 55.25 | |
中华羊茅 F. sinensis | 2 | 5.91 | 28.37 | 34.28 | 65.72 | 4.87 | 33.10 | 37.97 | 62.03 |
3 | 5.99 | 16.15 | 22.14 | 77.86 | 5.49 | 11.04 | 16.53 | 83.47 | |
4 | 20.13 | 34.85 | 54.98 | 45.02 | 15.41 | 30.43 | 45.85 | 54.15 | |
青海扁茎早熟禾 Poa pratensis var. anceps ‘Qinghai’ | 2 | 4.06 | 18.54 | 22.59 | 77.41 | 3.09 | 40.42 | 43.51 | 56.49 |
3 | 5.42 | 5.81 | 11.24 | 88.76 | 8.43 | 12.23 | 20.66 | 79.34 | |
4 | 20.12 | 29.03 | 49.16 | 50.84 | 17.48 | 30.74 | 48.23 | 51.77 | |
星星草 Puccinellia tenuiflora | 2 | 4.33 | 27.73 | 32.06 | 67.94 | 4.32 | 33.36 | 37.68 | 62.32 |
3 | 8.18 | 20.37 | 28.55 | 71.45 | 5.74 | 6.08 | 11.82 | 88.18 | |
4 | 21.18 | 32.90 | 54.09 | 45.91 | 18.33 | 29.73 | 48.07 | 51.93 | |
冷地早熟禾 Poa crymophila | 2 | 5.07 | 29.05 | 34.12 | 65.88 | 4.19 | 40.99 | 45.18 | 54.82 |
3 | 7.70 | 8.96 | 16.65 | 83.35 | 3.29 | 14.35 | 17.65 | 82.35 | |
4 | 18.46 | 30.38 | 48.84 | 51.16 | 18.36 | 29.47 | 47.83 | 52.17 |
Fig. 4 Effect of planting different grasses on soil soluble nitrogen contents on the Qingzang Plateau. SON, soluble organic nitrogen; STN, soluble total nitrogen. NMDS, non-metric multidimensional scaling. BI, Bromus inermis; EN, Elymus nutans; ES, E. sibiricus; FR, Festuca ryloviana; FS, F. sinensis; PC, Poa crymophila; PP, P. pratensis var. anceps ‘Qinghai’; PT, Puccinellia tenuiflora.
处理 Treatment | 指标 Variable | 0-10 cm | 10-20 cm |
---|---|---|---|
无芒雀麦 Bromus inermis | NH4+-N | -0.485 | -0.170 |
NO3--N | 0.010 | 0.068 | |
SON | 0.392 | 0.676* | |
STN | 0.403 | 0.681* | |
老芒麦 Elymus sibiricus | NH4+-N | -0.259 | -0.444 |
NO3--N | -0.328 | 0.067 | |
SON | 0.347 | 0.459 | |
STN | 0.231 | 0.328 | |
垂穗披碱草 E. nutans | NH4+-N | -0.436 | 0.239 |
NO3--N | 0.190 | 0.096 | |
SON | 0.224 | 0.360 | |
STN | 0.219 | 0.331 | |
西北羊茅 Festuca ryloviana | NH4+-N | -0.414 | -0.516 |
NO3--N | -0.636* | -0.450 | |
SON | 0.377 | 0.111 | |
STN | 0.218 | -0.098 | |
中华羊茅 F. sinensis | NH4+-N | -0.449 | -0.676* |
NO3--N | -0.453 | -0.184 | |
SON | 0.526 | 0.277 | |
STN | 0.347 | 0.114 | |
青海扁茎早熟禾 Poa pratensis var. anceps ‘Qinghai’ | NH4+-N | -0.293 | -0.134 |
NO3--N | -0.531 | -0.266 | |
SON | 0.460 | 0.017 | |
STN | 0.338 | -0.155 | |
星星草 Puccinellia tenuiflora | NH4+-N | -0.241 | -0.257 |
NO3--N | -0.052 | 0.113 | |
SON | 0.146 | 0.216 | |
STN | 0.083 | 0.200 | |
冷地早熟禾 Poa crymophila | NH4+-N | -0.494 | -0.548 |
NO3--N | -0.831* | 0.177 | |
SON | 0.350 | 0.828** | |
STN | 0.091 | 0.694* |
Table 2 Correlation analysis of soil nitrogen components and aboveground net primary productivity (ANPP) on the Qingzang Plateau
处理 Treatment | 指标 Variable | 0-10 cm | 10-20 cm |
---|---|---|---|
无芒雀麦 Bromus inermis | NH4+-N | -0.485 | -0.170 |
NO3--N | 0.010 | 0.068 | |
SON | 0.392 | 0.676* | |
STN | 0.403 | 0.681* | |
老芒麦 Elymus sibiricus | NH4+-N | -0.259 | -0.444 |
NO3--N | -0.328 | 0.067 | |
SON | 0.347 | 0.459 | |
STN | 0.231 | 0.328 | |
垂穗披碱草 E. nutans | NH4+-N | -0.436 | 0.239 |
NO3--N | 0.190 | 0.096 | |
SON | 0.224 | 0.360 | |
STN | 0.219 | 0.331 | |
西北羊茅 Festuca ryloviana | NH4+-N | -0.414 | -0.516 |
NO3--N | -0.636* | -0.450 | |
SON | 0.377 | 0.111 | |
STN | 0.218 | -0.098 | |
中华羊茅 F. sinensis | NH4+-N | -0.449 | -0.676* |
NO3--N | -0.453 | -0.184 | |
SON | 0.526 | 0.277 | |
STN | 0.347 | 0.114 | |
青海扁茎早熟禾 Poa pratensis var. anceps ‘Qinghai’ | NH4+-N | -0.293 | -0.134 |
NO3--N | -0.531 | -0.266 | |
SON | 0.460 | 0.017 | |
STN | 0.338 | -0.155 | |
星星草 Puccinellia tenuiflora | NH4+-N | -0.241 | -0.257 |
NO3--N | -0.052 | 0.113 | |
SON | 0.146 | 0.216 | |
STN | 0.083 | 0.200 | |
冷地早熟禾 Poa crymophila | NH4+-N | -0.494 | -0.548 |
NO3--N | -0.831* | 0.177 | |
SON | 0.350 | 0.828** | |
STN | 0.091 | 0.694* |
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