Chin J Plant Ecol ›› 2020, Vol. 44 ›› Issue (12): 1262-1272.DOI: 10.17521/cjpe.2020.0310
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LIU Shan-Shan1,2,5, ZHOU Wen-Jun1,2,5,*(), KUANG Lu-Hui3,5, LIU Zhan-Feng3,5, SONG Qing-Hai1,2,5, LIU Yun- Tong1,2,5, ZHANG Yi-Ping1,2,5, LU Zhi-Yun1,4, SHA Li-Qing1,2,5,*(
)
Received:
2020-09-11
Accepted:
2020-11-25
Online:
2020-12-20
Published:
2021-04-01
Contact:
ZHOU Wen-Jun,SHA Li-Qing
Supported by:
LIU Shan-Shan, ZHOU Wen-Jun, KUANG Lu-Hui, LIU Zhan-Feng, SONG Qing-Hai, LIU Yun- Tong, ZHANG Yi-Ping, LU Zhi-Yun, SHA Li-Qing. Responses of soil extracellular enzyme activities to carbon input alteration and warming in a subtropical evergreen broad-leaved forest[J]. Chin J Plant Ecol, 2020, 44(12): 1262-1272.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2020.0310
酶 Enzyme | 缩写 Abbreviation | 功能 Function |
---|---|---|
β-葡萄糖苷酶 β-glucosidase | BG | 分解易降解碳 Decomposition of labile carbon |
多酚氧化酶 Polyphenol oxidase | POX | 分解难降解碳 Decomposition of recalcitrant carbon |
过氧化物酶 Peroxidase | PER | 分解难降解碳 Decomposition of recalcitrant carbon |
β-1,4-N-乙酰氨基葡萄糖苷酶 β-1,4-N-acetylglucosaminidase | NAG | 分解氮 Hydrolyze nitrogen |
酸性磷酸酶 Acid phosphatase | AP | 分解磷 Hydrolyze phosphorus |
Table 1 Name, abbreviation and function of soil enzymes
酶 Enzyme | 缩写 Abbreviation | 功能 Function |
---|---|---|
β-葡萄糖苷酶 β-glucosidase | BG | 分解易降解碳 Decomposition of labile carbon |
多酚氧化酶 Polyphenol oxidase | POX | 分解难降解碳 Decomposition of recalcitrant carbon |
过氧化物酶 Peroxidase | PER | 分解难降解碳 Decomposition of recalcitrant carbon |
β-1,4-N-乙酰氨基葡萄糖苷酶 β-1,4-N-acetylglucosaminidase | NAG | 分解氮 Hydrolyze nitrogen |
酸性磷酸酶 Acid phosphatase | AP | 分解磷 Hydrolyze phosphorus |
观测项目 Observation item | 测定值 Value |
---|---|
酸碱度 pH | 4.25 ± 0.05 |
容重 Bulk density (g·cm-3) | 0.54 ± 0.02 |
总孔隙度 Total porosity (%) | 71.7 ± 2.0 |
土壤最大持水量 Maximum water capacity of soil (%) | 119.1 ± 6.0 |
有机质含量 Organic matter content (g·kg-1) | 175.1 ± 11.7 |
总氮含量 Total nitrogen content (g·kg-1) | 7.18 ± 0.34 |
碳氮比 C:N | 14.1 ± 1.6 |
Table 2 Basic physical and chemical properties of soil before the experiment started in 2010 (mean ± SD)
观测项目 Observation item | 测定值 Value |
---|---|
酸碱度 pH | 4.25 ± 0.05 |
容重 Bulk density (g·cm-3) | 0.54 ± 0.02 |
总孔隙度 Total porosity (%) | 71.7 ± 2.0 |
土壤最大持水量 Maximum water capacity of soil (%) | 119.1 ± 6.0 |
有机质含量 Organic matter content (g·kg-1) | 175.1 ± 11.7 |
总氮含量 Total nitrogen content (g·kg-1) | 7.18 ± 0.34 |
碳氮比 C:N | 14.1 ± 1.6 |
处理 Treatment | 土壤含水量 Soil water content (%) | 铵态氮含量 NH4+-N content (mg·kg-1) | 硝态氮含量 NO3--N content (mg·kg-1) | 溶解有机碳含量 Dissolved organic carbon content (mg·kg-1) | 溶解总氮含量 Total dissolved nitrogen content (mg·kg-1) | 溶解有机氮含量 Dissolved organic nitrogen content (mg·kg-1) | 矿质氮含量 Mineral-N content (mg·kg-1) |
---|---|---|---|---|---|---|---|
0-5 cm | |||||||
CK | 34.35 ± 2.30aA | 61.11 ± 11.30abA | 10.26 ± 3.75aA | 235.88 ± 21.76aA | 118.79 ± 16.82abA | 47.43 ± 7.77aA | 71.36 ± 9.19abA |
LR | 26.35 ± 0.81bA | 43.74 ± 4.55bA | 10.03 ± 3.31aA | 267.48 ± 21.10aA | 93.92 ± 4.01bA | 40.16 ± 3.41aA | 53.76 ± 1.49bA |
TR | 33.65 ± 1.35aA | 89.08 ± 6.10aA | 2.49 ± 0.27aA | 259.62 ± 17.47aA | 143.56 ± 7.52aA | 51.99 ± 8.12aA | 91.57 ± 5.93aA |
TR+W | 29.41 ± 1.16abA | 52.56 ± 1.19bA | 3.90 ± 0.16aA | 232.33 ± 20.29aA | 103.89 ± 7.87abA | 47.44 ± 8.38aA | 56.45 ± 1.31bA |
5-10 cm | |||||||
CK | 32.44 ± 1.07aA | 29.12 ± 3.22aB | 5.73 ± 0.23bA | 207.73 ± 13.46bA | 48.11 ± 2.88bB | 13.27 ± 4.96aB | 34.84 ± 3.09aB |
LR | 30.00 ± 0.58bB | 28.72 ± 1.68aA | 7.55 ± 0.74abA | 269.07 ± 13.14aA | 61.43 ± 2.79aB | 25.16 ± 1.52aB | 36.27 ± 2.34aB |
TR | 32.56 ± 0.72aA | 28.88 ± 1.77aB | 9.35 ± 0.90aB | 189.94 ± 10.05bB | 52.78 ± 4.49abB | 14.55 ± 3.98aB | 38.23 ± 1.73aB |
TR+W | 30.95 ± 0.37abA | 33.42 ± 1.94aB | 5.18 ± 0.75bA | 214.82 ± 9.62bA | 53.44 ± 3.15abB | 14.83 ± 2.20aB | 38.60 ± 2.01aB |
Table 3 Basic physical and chemical properties of soil in the subtropical evergreen broad-leaved forest under different treatments (mean ± SD, n = 5)
处理 Treatment | 土壤含水量 Soil water content (%) | 铵态氮含量 NH4+-N content (mg·kg-1) | 硝态氮含量 NO3--N content (mg·kg-1) | 溶解有机碳含量 Dissolved organic carbon content (mg·kg-1) | 溶解总氮含量 Total dissolved nitrogen content (mg·kg-1) | 溶解有机氮含量 Dissolved organic nitrogen content (mg·kg-1) | 矿质氮含量 Mineral-N content (mg·kg-1) |
---|---|---|---|---|---|---|---|
0-5 cm | |||||||
CK | 34.35 ± 2.30aA | 61.11 ± 11.30abA | 10.26 ± 3.75aA | 235.88 ± 21.76aA | 118.79 ± 16.82abA | 47.43 ± 7.77aA | 71.36 ± 9.19abA |
LR | 26.35 ± 0.81bA | 43.74 ± 4.55bA | 10.03 ± 3.31aA | 267.48 ± 21.10aA | 93.92 ± 4.01bA | 40.16 ± 3.41aA | 53.76 ± 1.49bA |
TR | 33.65 ± 1.35aA | 89.08 ± 6.10aA | 2.49 ± 0.27aA | 259.62 ± 17.47aA | 143.56 ± 7.52aA | 51.99 ± 8.12aA | 91.57 ± 5.93aA |
TR+W | 29.41 ± 1.16abA | 52.56 ± 1.19bA | 3.90 ± 0.16aA | 232.33 ± 20.29aA | 103.89 ± 7.87abA | 47.44 ± 8.38aA | 56.45 ± 1.31bA |
5-10 cm | |||||||
CK | 32.44 ± 1.07aA | 29.12 ± 3.22aB | 5.73 ± 0.23bA | 207.73 ± 13.46bA | 48.11 ± 2.88bB | 13.27 ± 4.96aB | 34.84 ± 3.09aB |
LR | 30.00 ± 0.58bB | 28.72 ± 1.68aA | 7.55 ± 0.74abA | 269.07 ± 13.14aA | 61.43 ± 2.79aB | 25.16 ± 1.52aB | 36.27 ± 2.34aB |
TR | 32.56 ± 0.72aA | 28.88 ± 1.77aB | 9.35 ± 0.90aB | 189.94 ± 10.05bB | 52.78 ± 4.49abB | 14.55 ± 3.98aB | 38.23 ± 1.73aB |
TR+W | 30.95 ± 0.37abA | 33.42 ± 1.94aB | 5.18 ± 0.75bA | 214.82 ± 9.62bA | 53.44 ± 3.15abB | 14.83 ± 2.20aB | 38.60 ± 2.01aB |
Fig. 1 Changes of enzyme activities under different treatments and depths in the subtropical evergreen broad-leaved forest (mean + SD, n = 5). CK, control; LR, litter removal; TR, root removal; TR+W, root removal + warming. Different lowercase letters indicate significant differences among different treatments at the same soil depth (p < 0.05). Different uppercase letters indicate significant differences among different soil depths in the same treatment (p < 0.05). AP, acid phosphatase; BG, β-glucosidase; NAG, β-1,4-N- acetylglucosaminidase; PER, peroxidase; POX, polyphenol oxidase.
Fig. 2 Stoichiometric ratios of soil enzymes at different treatments and depths in the subtropical evergreen broad-leaved forest (mean + SD, n = 5). CK, control; LR, litter removal; TR, root removal; TR+W, root removal + warming. Different lowercase letters indicate significant differences among different treatments at the same soil depth (p < 0.05). Different uppercase letters indicate significant differences among different soil depths in the same treatment (p < 0.05). AP, acid phosphatase; BG, β-glucosidase; NAG, β-1,4-N-acetylglucosaminidase.
Fig. 3 Standardized major axis regressions of the log-transformed soil BG, NAG and AP activities in 0-5 (A, B, C) and 5-10 cm (D, E, F) soil layers in the subtropical evergreen broad-leaved forest (n = 20). CK, control; LR, litter removal; TR, root removal; TR+W, root removal + warming. AP, acid phosphatase; BG, β-glucosidase; NAG, β-1,4-N-acetylglucosaminidase.
Fig. 4 Redundancy analysis (RDA) of soil enzyme activities and physical and chemical properties in the subtropical evergreen broad-leaved forest. NH4+-N, ammonium nitrogen content; NO3--N, nitrate nitrogen content; DOC, dissolved organic carbon content; SWC, soil water content. AP, acid phosphatase; BG, β-glucosidase; NAG, β-1,4-N-acetylglucosaminidase; PER, Peroxidase; POX, Polyphenol oxidase.
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