Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (2): 212-219.DOI: 10.11686/cyxb2020116
Mei XIONG1(), Ji-rong QIAO1, Yang YANG1, Feng ZHANG1, Jia-hua ZHENG1, Jian-xin WU2, Meng-li ZHAO1()
Received:
2020-03-13
Revised:
2020-04-22
Online:
2021-02-20
Published:
2021-01-19
Contact:
Meng-li ZHAO
Mei XIONG, Ji-rong QIAO, Yang YANG, Feng ZHANG, Jia-hua ZHENG, Jian-xin WU, Meng-li ZHAO. Stocking rate effects on stoichiometric characteristics of the steppe grassland pioneer species Stipabreviflora and its underlying soil[J]. Acta Prataculturae Sinica, 2021, 30(2): 212-219.
载畜率Stocking rate | C (mg·g-1) | N (mg·g-1) | P (mg·g-1) | C∶N | C∶P | N∶P |
---|---|---|---|---|---|---|
对照CK | 445.04±3.62c | 18.30±1.58a | 1.53±0.06a | 24.64±1.82a | 292.55±13.41a | 12.09±1.46a |
轻度放牧LG | 445.08±2.76c | 19.00±0.63a | 1.28±0.04a | 23.47±0.79a | 349.58±14.08a | 14.91±0.59a |
中度放牧MG | 454.69±6.87b | 19.15±1.07a | 1.48±0.13a | 23.87±1.25a | 312.62±29.13a | 13.28±1.90a |
重度放牧HG | 464.50±1.82a | 16.68±0.27a | 1.46±0.50a | 27.85±0.34a | 318.97±11.84a | 11.46±0.54a |
Table 1 C, N, P and C∶N∶P ratio characters of S. breviflora under different stocking rates
载畜率Stocking rate | C (mg·g-1) | N (mg·g-1) | P (mg·g-1) | C∶N | C∶P | N∶P |
---|---|---|---|---|---|---|
对照CK | 445.04±3.62c | 18.30±1.58a | 1.53±0.06a | 24.64±1.82a | 292.55±13.41a | 12.09±1.46a |
轻度放牧LG | 445.08±2.76c | 19.00±0.63a | 1.28±0.04a | 23.47±0.79a | 349.58±14.08a | 14.91±0.59a |
中度放牧MG | 454.69±6.87b | 19.15±1.07a | 1.48±0.13a | 23.87±1.25a | 312.62±29.13a | 13.28±1.90a |
重度放牧HG | 464.50±1.82a | 16.68±0.27a | 1.46±0.50a | 27.85±0.34a | 318.97±11.84a | 11.46±0.54a |
土层Depth | 载畜率Stocking rate | C (mg·g-1) | N (mg·g-1) | P (mg·g-1) | C∶N | C∶P | N∶P |
---|---|---|---|---|---|---|---|
0~20 cm | 对照CK | 13.14±0.72a | 1.19±0.03b | 0.55±0.03ab | 10.30±0.61a | 24.35±2.17ab | 2.23±0.18b |
轻度放牧LG | 12.56±0.44a | 1.20±0.03b | 0.45±0.07bc | 10.58±0.53a | 34.41±9.46ab | 3.12±0.61ab | |
中度放牧MG | 12.73±0.99a | 1.31±0.04ab | 0.60±0.01a | 9.71±0.51a | 21.37±2.15b | 2.20±0.12b | |
重度放牧HG | 12.63±0.81a | 1.37±0.09a | 0.35±0.04c | 9.25±0.02a | 43.10±6.79a | 4.67±0.73a | |
20~40 cm | 对照CK | 17.70±0.44a | 1.01±0.05ab | 0.45±0.03a | 17.69±0.56ab | 33.68±8.46b | 1.94±0.50b |
轻度放牧LG | 16.17±0.89a | 0.86±0.03c | 0.51±0.08a | 19.01±1.36a | 34.53±8.13b | 1.80±0.37b | |
中度放牧MG | 14.84±1.15a | 0.94±0.05bc | 0.24±0.00b | 15.89±0.17b | 60.87±5.61a | 3.84±0.29a | |
重度放牧HG | 14.70±1.96a | 1.12±0.09a | 0.45±0.01a | 13.01±0.75c | 38.19±7.57ab | 2.97±0.50ab |
Table 2 Soil C, N, P and C∶N∶P ratios of the two soil layers under different stocking rates
土层Depth | 载畜率Stocking rate | C (mg·g-1) | N (mg·g-1) | P (mg·g-1) | C∶N | C∶P | N∶P |
---|---|---|---|---|---|---|---|
0~20 cm | 对照CK | 13.14±0.72a | 1.19±0.03b | 0.55±0.03ab | 10.30±0.61a | 24.35±2.17ab | 2.23±0.18b |
轻度放牧LG | 12.56±0.44a | 1.20±0.03b | 0.45±0.07bc | 10.58±0.53a | 34.41±9.46ab | 3.12±0.61ab | |
中度放牧MG | 12.73±0.99a | 1.31±0.04ab | 0.60±0.01a | 9.71±0.51a | 21.37±2.15b | 2.20±0.12b | |
重度放牧HG | 12.63±0.81a | 1.37±0.09a | 0.35±0.04c | 9.25±0.02a | 43.10±6.79a | 4.67±0.73a | |
20~40 cm | 对照CK | 17.70±0.44a | 1.01±0.05ab | 0.45±0.03a | 17.69±0.56ab | 33.68±8.46b | 1.94±0.50b |
轻度放牧LG | 16.17±0.89a | 0.86±0.03c | 0.51±0.08a | 19.01±1.36a | 34.53±8.13b | 1.80±0.37b | |
中度放牧MG | 14.84±1.15a | 0.94±0.05bc | 0.24±0.00b | 15.89±0.17b | 60.87±5.61a | 3.84±0.29a | |
重度放牧HG | 14.70±1.96a | 1.12±0.09a | 0.45±0.01a | 13.01±0.75c | 38.19±7.57ab | 2.97±0.50ab |
项目 Item | 0~20 cm | 20~40 cm | ||||
---|---|---|---|---|---|---|
土壤C Soil C | 土壤N Soil N | 土壤P Soil P | 土壤C Soil C | 土壤N Soil N | 土壤P Soil P | |
植物C Plant C | -0.338 | -0.310 | 0.483 | -0.466 | 0.004 | 0.359 |
植物N Plant N | 0.411 | -0.480 | 0.424 | 0.277 | -0.523 | 0.486 |
植物P Plant P | -0.242 | 0.445 | 0.023 | -0.189 | -0.173 | -0.332 |
Table 3 Correlations of C, N, P content between S. breviflora and soil
项目 Item | 0~20 cm | 20~40 cm | ||||
---|---|---|---|---|---|---|
土壤C Soil C | 土壤N Soil N | 土壤P Soil P | 土壤C Soil C | 土壤N Soil N | 土壤P Soil P | |
植物C Plant C | -0.338 | -0.310 | 0.483 | -0.466 | 0.004 | 0.359 |
植物N Plant N | 0.411 | -0.480 | 0.424 | 0.277 | -0.523 | 0.486 |
植物P Plant P | -0.242 | 0.445 | 0.023 | -0.189 | -0.173 | -0.332 |
项目 Item | 0~20 cm | 20~40 cm | ||||
---|---|---|---|---|---|---|
土壤C∶N Soil C∶N | 土壤C∶P Soil C∶P | 土壤N∶P Soil N∶P | 土壤C∶N Soil C∶N | 土壤C∶P Soil C∶P | 土壤N∶P Soil N∶P | |
植物C∶N Plant C∶N | -0.467 | -0.042 | 0.282 | -0.479 | 0.222 | 0.455 |
植物C∶P Plant C∶P | 0.354 | -0.034 | -0.202 | 0.103 | -0.380 | -0.281 |
植物N∶P Plant N∶P | 0.506 | -0.026 | -0.286 | 0.306 | -0.402 | -0.406 |
Table 4 Correlations of C∶N∶P ratios between S. breviflora and soil
项目 Item | 0~20 cm | 20~40 cm | ||||
---|---|---|---|---|---|---|
土壤C∶N Soil C∶N | 土壤C∶P Soil C∶P | 土壤N∶P Soil N∶P | 土壤C∶N Soil C∶N | 土壤C∶P Soil C∶P | 土壤N∶P Soil N∶P | |
植物C∶N Plant C∶N | -0.467 | -0.042 | 0.282 | -0.479 | 0.222 | 0.455 |
植物C∶P Plant C∶P | 0.354 | -0.034 | -0.202 | 0.103 | -0.380 | -0.281 |
植物N∶P Plant N∶P | 0.506 | -0.026 | -0.286 | 0.306 | -0.402 | -0.406 |
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