Acta Prataculturae Sinica ›› 2022, Vol. 31 ›› Issue (1): 47-56.DOI: 10.11686/cyxb2020477
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Jia-qiang JING1,2(), Ren-qi-li-mo-ge SA2, Jie QIN2, Hai-fang ZHANG2, Ming LI2, Dian-lin YANG2()
Received:
2020-10-20
Revised:
2020-12-28
Online:
2021-12-01
Published:
2021-12-01
Contact:
Dian-lin YANG
Jia-qiang JING, Ren-qi-li-mo-ge SA, Jie QIN, Hai-fang ZHANG, Ming LI, Dian-lin YANG. Effects of different land-use patterns on soil active organic carbon in Stipa baicalensis steppe in Inner Mongolia[J]. Acta Prataculturae Sinica, 2022, 31(1): 47-56.
利用方式 Land use patterns | pH | 土壤有机碳 Soil organic carbon (SOC, g·kg-1) | 全氮 Total nitrogen (TN, g·kg-1) | 全磷 Total phosphorus (TP, g·kg-1) | 铵态氮 NH4+-N (mg·kg-1) | 硝态氮 NO3--N (mg·kg-1) |
---|---|---|---|---|---|---|
围封Enclosure | 6.72±0.05b | 13.54±0.03a | 2.46±0.10a | 0.41±0.00a | 4.52±0.05b | 1.19±0.04b |
放牧Grazing | 6.74±0.03b | 13.01±0.07b | 2.46±0.10a | 0.42±0.00a | 5.15±0.23a | 1.56±0.04a |
刈割Mowing | 7.26±0.11a | 13.30±0.11a | 2.61±0.03a | 0.41±0.01a | 4.74±0.05ab | 1.23±0.04b |
Table 1 Soil organic carbon content and basic physical and chemical properties of S. baicalensis steppe under different land use patterns
利用方式 Land use patterns | pH | 土壤有机碳 Soil organic carbon (SOC, g·kg-1) | 全氮 Total nitrogen (TN, g·kg-1) | 全磷 Total phosphorus (TP, g·kg-1) | 铵态氮 NH4+-N (mg·kg-1) | 硝态氮 NO3--N (mg·kg-1) |
---|---|---|---|---|---|---|
围封Enclosure | 6.72±0.05b | 13.54±0.03a | 2.46±0.10a | 0.41±0.00a | 4.52±0.05b | 1.19±0.04b |
放牧Grazing | 6.74±0.03b | 13.01±0.07b | 2.46±0.10a | 0.42±0.00a | 5.15±0.23a | 1.56±0.04a |
刈割Mowing | 7.26±0.11a | 13.30±0.11a | 2.61±0.03a | 0.41±0.01a | 4.74±0.05ab | 1.23±0.04b |
利用方式 Land use patterns | 可溶性有机碳 比例 DOC/SOC | 易氧化有机碳比例 ROC/SOC | 微生物生物量碳比例 MBC/SOC |
---|---|---|---|
围封Enclosure | 0.61±0.01b | 59.15±0.51a | 4.92±0.19a |
放牧Grazing | 0.70±0.01a | 52.75±2.38b | 3.59±0.05b |
刈割Mowing | 0.55±0.05b | 58.93±1.44a | 4.83±0.25a |
Table 2 Distribution ratio of soil active organic carbon under different utilization methods (%)
利用方式 Land use patterns | 可溶性有机碳 比例 DOC/SOC | 易氧化有机碳比例 ROC/SOC | 微生物生物量碳比例 MBC/SOC |
---|---|---|---|
围封Enclosure | 0.61±0.01b | 59.15±0.51a | 4.92±0.19a |
放牧Grazing | 0.70±0.01a | 52.75±2.38b | 3.59±0.05b |
刈割Mowing | 0.55±0.05b | 58.93±1.44a | 4.83±0.25a |
指标Index | 易氧化有机碳ROC | 微生物生物量碳MBC | 土壤有机碳SOC | pH | 全氮TN | 全磷TP |
---|---|---|---|---|---|---|
可溶性有机碳DOC | -0.20 | -0.32 | -0.25 | -0.30 | -0.24 | -0.08 |
易氧化有机碳ROC | 0.92** | 0.95** | -0.24 | 0.95** | 0.58** | |
微生物生物量碳MBC | 0.90** | -0.08 | 0.89** | 0.51** |
Table 3 Correlation coefficients between soil active organic carbon content and soil physical and chemical indexes
指标Index | 易氧化有机碳ROC | 微生物生物量碳MBC | 土壤有机碳SOC | pH | 全氮TN | 全磷TP |
---|---|---|---|---|---|---|
可溶性有机碳DOC | -0.20 | -0.32 | -0.25 | -0.30 | -0.24 | -0.08 |
易氧化有机碳ROC | 0.92** | 0.95** | -0.24 | 0.95** | 0.58** | |
微生物生物量碳MBC | 0.90** | -0.08 | 0.89** | 0.51** |
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