Chin J Plant Ecol ›› 2009, Vol. 33 ›› Issue (6): 1015-1022.DOI: 10.3773/j.issn.1005-264x.2009.06.001
• Original article • Next Articles
LI Hai-Fang1,2, XIA Han-Ping1,*(), FU Sheng-Lei1, ZHANG Xing-Feng1
Received:
2009-03-04
Accepted:
2009-08-03
Online:
2009-03-04
Published:
2021-04-29
Contact:
XIA Han-Ping
LI Hai-Fang, XIA Han-Ping, FU Sheng-Lei, ZHANG Xing-Feng. EMISSIONS OF SOIL GREENHOUSE GASES IN RESPONSE TO UNDERSTORY REMOVAL AND CASSIA ALATAADDITION IN AN EUCALYPTUS UROPHYLLA PLANTATION IN GUANGDONG PROVINCE, CHINA[J]. Chin J Plant Ecol, 2009, 33(6): 1015-1022.
变量 Variable | 处理 Treatment | p | |||
---|---|---|---|---|---|
A | B | C | CK | ||
土壤温度 Soil temperature (℃) | 23.07 a b | 23.33a | 22.98a b | 22.68b | <0.05 |
土壤湿度 Soil moisture (%) | 17.27a | 14.08b | 16.72a | 17.24a | <0.01 |
pH | 4.25 | 4.17 | 4.21 | 4.26 | ns |
土壤有机C Soil organic carbon (%) | 1.96a | 1.44b | 1.90a | 1.97a | <0.05 |
NO3-N (mg·kg-1) | 7.13a | 5.702b | 5.44b | 5.07b | <0.05 |
NH4-N (mg·kg-1) | 4.91 | 6.41 | 4.97 | 6.88 | ns |
根系生物量 Fine root biomass (g·m-2) | 116.15b | 156.502b | 360.01a | 352.02a | <0.01 |
微生物碳 Microbial biomass carbon (mg·kg-1) | 398.02a | 329.34a b | 309.43a b | 219.15b | <0.01 |
Table 1 Average of soil CO2, CH4 and N2O fluxes and soil properties under four treatments
变量 Variable | 处理 Treatment | p | |||
---|---|---|---|---|---|
A | B | C | CK | ||
土壤温度 Soil temperature (℃) | 23.07 a b | 23.33a | 22.98a b | 22.68b | <0.05 |
土壤湿度 Soil moisture (%) | 17.27a | 14.08b | 16.72a | 17.24a | <0.01 |
pH | 4.25 | 4.17 | 4.21 | 4.26 | ns |
土壤有机C Soil organic carbon (%) | 1.96a | 1.44b | 1.90a | 1.97a | <0.05 |
NO3-N (mg·kg-1) | 7.13a | 5.702b | 5.44b | 5.07b | <0.05 |
NH4-N (mg·kg-1) | 4.91 | 6.41 | 4.97 | 6.88 | ns |
根系生物量 Fine root biomass (g·m-2) | 116.15b | 156.502b | 360.01a | 352.02a | <0.01 |
微生物碳 Microbial biomass carbon (mg·kg-1) | 398.02a | 329.34a b | 309.43a b | 219.15b | <0.01 |
Fig. 2 Comparisons of soil CO2, CH4 and N2O fluxes under four treatments in pure Eucalyptus urophylla plantation Column superscript letters indicate significant differences within four treatments (p<0.05)
因子 Factor | CO2通量 CO2flux (Y1) (mg·m-2·h-1) | CH4通量 CH4flux (Y2) (μg·m-2·h-1) | N2O通量 N2O flux (Y3) (mg·m-2·h-1) |
---|---|---|---|
土壤温度 Soil temperature (X1) (℃) | Y1=35.91e0.05X1 (R2=0.25; p<0.01;n=408) | Y2=-31.34+1.40X1 (R2=0.03; p<0.01;n=408) | Y3=6.28+0.27X1 (R2=0.07; p<0.01;n=408) |
土壤湿度 Soil moisture (X2) (%) | Y1=94.73+1.76 X2 (R2=0.04;p <0.01; n=408) | Y2=-4.12+0.42X2 (R2=0.08; p<0.01;n=408) | Y3=18.46-0.31X2 (R2=0.02; p<0.01;n=408) |
NO3-N (X3) (mg·kg-1) | – | – | Y3=6.11+0.67X3 (R2=0.31; p<0.05;n=6) |
微生物C Microbial biomass carbon (X4) (mg·kg-1) | Y1=84.35+0.16X3 (R2=0.39; p<0.01;n=6) | – | – |
Table 2 Relationships between soil CO2, CH4 and N2O fluxes and environmental factors
因子 Factor | CO2通量 CO2flux (Y1) (mg·m-2·h-1) | CH4通量 CH4flux (Y2) (μg·m-2·h-1) | N2O通量 N2O flux (Y3) (mg·m-2·h-1) |
---|---|---|---|
土壤温度 Soil temperature (X1) (℃) | Y1=35.91e0.05X1 (R2=0.25; p<0.01;n=408) | Y2=-31.34+1.40X1 (R2=0.03; p<0.01;n=408) | Y3=6.28+0.27X1 (R2=0.07; p<0.01;n=408) |
土壤湿度 Soil moisture (X2) (%) | Y1=94.73+1.76 X2 (R2=0.04;p <0.01; n=408) | Y2=-4.12+0.42X2 (R2=0.08; p<0.01;n=408) | Y3=18.46-0.31X2 (R2=0.02; p<0.01;n=408) |
NO3-N (X3) (mg·kg-1) | – | – | Y3=6.11+0.67X3 (R2=0.31; p<0.05;n=6) |
微生物C Microbial biomass carbon (X4) (mg·kg-1) | Y1=84.35+0.16X3 (R2=0.39; p<0.01;n=6) | – | – |
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