Chin J Plant Ecol ›› 2011, Vol. 35 ›› Issue (9): 906-913.DOI: 10.3724/SP.J.1258.2011.00906
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ZHANG Peng, LI Xin-Rong*(), JIA Rong-Liang, HU Yi-Gang, HUANG Lei
Received:
2011-01-30
Accepted:
2011-06-28
Online:
2011-01-30
Published:
2011-09-01
Contact:
LI Xin-Rong
ZHANG Peng, LI Xin-Rong, JIA Rong-Liang, HU Yi-Gang, HUANG Lei. Nitrogenase activity of biological soil crusts and its response to hydrothermic factors in the Shapotou region of northern China[J]. Chin J Plant Ecol, 2011, 35(9): 906-913.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2011.00906
Fig. 1 Characteristics of nitrogenase activity of different biological soil crusts (mean ± SD). Different small letters indicate significant difference in nitrogenase activity between three types of biological soil crusts (p < 0.01).
Fig. 2 Effect of water treatment on nitrogenase activity of different biological soil crusts (mean ± SD). Different capital letters indicate significant difference in nitrogenase activity of the same biological soil crusts among different water treatments; different small letters denote significant difference in nitrogenase activity among different biological soil crusts in the same water treatment (p < 0.01).
Fig. 4 Variations at nitrogenase activity of three biological soil crusts in different temperature ranges (mean ± SD). Different capital letters indicate significant difference in nitrogenase activity of same biological soil crusts among different temperature ranges (p < 0.01); different small letters denote significant difference in nitrogenase activity among different biological soil crusts in the same temperature range (p < 0.01).
变异来源 Source of variation | III型平方和 Type III sum of squares | df | 均方 Mean square | F | p |
---|---|---|---|---|---|
校正模型 Corrected model | 8.46 × 1010 | 134 | 6.31 × 108 | 53.00 | 0.000 |
截距 Intercept | 2.31 × 1011 | 1 | 2.31 × 1011 | 19 365.37 | 0.000 |
结皮类型 Crust type | 1.71 × 1010 | 2 | 8.57 × 109 | 719.66 | 0.000 |
水分处理 Water treatment | 1.14 × 108 | 2 | 5.72 × 107 | 4.81 | 0.009 |
温度 Temperature | 5.77 × 1010 | 14 | 4.12 × 109 | 346.26 | 0.000 |
结皮类型×水分处理 Crust type × Water treatment | 3.88 × 108 | 4 | 9.71 × 107 | 8.15 | 0.000 |
结皮类型×温度 Crust type × Temperature | 6.86 × 109 | 28 | 2.45 × 108 | 20.58 | 0.000 |
水分处理×温度 Water treatment × Temperature | 1.04 × 109 | 28 | 3.72 × 107 | 3.13 | 0.000 |
结皮类型×水分处理×温度 Crust type × Water treatment × Temperature | 1.70 × 109 | 56 | 3.03 × 107 | 2.55 | 0.000 |
误差 Error | 4.29 × 109 | 360 | 1.19 × 107 | ||
总和 Total | 3.20 × 109 | 495 | |||
校正总和 Corrected total | 8.89 × 1010 | 494 |
Table 1 Tests of between-subjects effects
变异来源 Source of variation | III型平方和 Type III sum of squares | df | 均方 Mean square | F | p |
---|---|---|---|---|---|
校正模型 Corrected model | 8.46 × 1010 | 134 | 6.31 × 108 | 53.00 | 0.000 |
截距 Intercept | 2.31 × 1011 | 1 | 2.31 × 1011 | 19 365.37 | 0.000 |
结皮类型 Crust type | 1.71 × 1010 | 2 | 8.57 × 109 | 719.66 | 0.000 |
水分处理 Water treatment | 1.14 × 108 | 2 | 5.72 × 107 | 4.81 | 0.009 |
温度 Temperature | 5.77 × 1010 | 14 | 4.12 × 109 | 346.26 | 0.000 |
结皮类型×水分处理 Crust type × Water treatment | 3.88 × 108 | 4 | 9.71 × 107 | 8.15 | 0.000 |
结皮类型×温度 Crust type × Temperature | 6.86 × 109 | 28 | 2.45 × 108 | 20.58 | 0.000 |
水分处理×温度 Water treatment × Temperature | 1.04 × 109 | 28 | 3.72 × 107 | 3.13 | 0.000 |
结皮类型×水分处理×温度 Crust type × Water treatment × Temperature | 1.70 × 109 | 56 | 3.03 × 107 | 2.55 | 0.000 |
误差 Error | 4.29 × 109 | 360 | 1.19 × 107 | ||
总和 Total | 3.20 × 109 | 495 | |||
校正总和 Corrected total | 8.89 × 1010 | 494 |
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