Chin J Plant Ecol ›› 2011, Vol. 35 ›› Issue (2): 159-166.DOI: 10.3724/SP.J.1258.2011.00159
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XU Qian-Qian, LIU Qi-Jing*(), ZHANG Guo-Chun
Received:
2010-01-28
Accepted:
2010-05-07
Online:
2011-01-28
Published:
2011-01-21
Contact:
LIU Qi-Jing
XU Qian-Qian, LIU Qi-Jing, ZHANG Guo-Chun. Soil nitrogen dynamics and productivity of snowpack Sanguisorba sitchensis community in alpine tundra of Changbai Mountain, China[J]. Chin J Plant Ecol, 2011, 35(2): 159-166.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2011.00159
项目 Item | 样点06 Sampling point 06 | 样点070601 Sampling point 070601 | 样点070603 Sampling point 070603 |
---|---|---|---|
年平均温度 Yearly average temperature (℃) | 2.5 | 3.9 | -0.1 |
最冷月平均温度 Mean temperature of coldest month (℃) | -1.4 | -1.0 | -14.7 |
最热月平均温度 Mean temperature of warmest month (℃) | 12.3 | 13.6 | 13.0 |
最低日平均温度 Minimum daily mean temperature (℃) | -1.5 | -1.3 | -16.9 |
最高日平均温度Maximum daily mean temperature (℃) | 15.1 | 16.9 | 16.3 |
日极端最高温度 Extreme high mean temperature (℃) | 20.5 | 19.3 | 21.8 |
日极端最低温度 Extreme low daily temperature (℃) | -1.5 | -1.3 | -17.8 |
温暖指数 Warmth index (℃) | 15.6 | 25.4 | 21.2 |
寒冷指数 Coldness index (℃) | 0.0 | 0.0 | -22.9 |
平均温度>0 ℃日数 Number of days with daily temperature > 0 ℃ | 187 | 279 | 179 |
平均温度≥1 ℃日数 Number of days with daily temperature ≥1 ℃ | 109 | 142 | 151 |
平均温度[-0.99, 0.99 ℃]日数Number of days with daily temperature at [-0.99, 0.99 ℃] | 178 | 193 | 74 |
平均温度≤-1 ℃日数 Number of days with daily temperature ≤-1 ℃ | 79 | 31 | 141 |
平均温度≤0 ℃日数 Number of days with daily temperature ≤0 ℃ | 179 | 87 | 187 |
极端最低温度≤0 ℃日数 Number of days with extreme low temperature ≤ 0 ℃ | 179 | 91 | 211 |
Table 1 Soil temperature characteristics in alpine tundra of Changbai Mountain
项目 Item | 样点06 Sampling point 06 | 样点070601 Sampling point 070601 | 样点070603 Sampling point 070603 |
---|---|---|---|
年平均温度 Yearly average temperature (℃) | 2.5 | 3.9 | -0.1 |
最冷月平均温度 Mean temperature of coldest month (℃) | -1.4 | -1.0 | -14.7 |
最热月平均温度 Mean temperature of warmest month (℃) | 12.3 | 13.6 | 13.0 |
最低日平均温度 Minimum daily mean temperature (℃) | -1.5 | -1.3 | -16.9 |
最高日平均温度Maximum daily mean temperature (℃) | 15.1 | 16.9 | 16.3 |
日极端最高温度 Extreme high mean temperature (℃) | 20.5 | 19.3 | 21.8 |
日极端最低温度 Extreme low daily temperature (℃) | -1.5 | -1.3 | -17.8 |
温暖指数 Warmth index (℃) | 15.6 | 25.4 | 21.2 |
寒冷指数 Coldness index (℃) | 0.0 | 0.0 | -22.9 |
平均温度>0 ℃日数 Number of days with daily temperature > 0 ℃ | 187 | 279 | 179 |
平均温度≥1 ℃日数 Number of days with daily temperature ≥1 ℃ | 109 | 142 | 151 |
平均温度[-0.99, 0.99 ℃]日数Number of days with daily temperature at [-0.99, 0.99 ℃] | 178 | 193 | 74 |
平均温度≤-1 ℃日数 Number of days with daily temperature ≤-1 ℃ | 79 | 31 | 141 |
平均温度≤0 ℃日数 Number of days with daily temperature ≤0 ℃ | 179 | 87 | 187 |
极端最低温度≤0 ℃日数 Number of days with extreme low temperature ≤ 0 ℃ | 179 | 91 | 211 |
样点 Sampling point | 状态 Status | 培养时间 Incubation period | 水解N含量 Hydrolyzable N content (kg·hm-2) |
---|---|---|---|
06 | 原位 On site | 2006-06-28- 2008-08-23 | 441 |
06 | 移位 Off site | 2006-06-28- 2008-08-23 | 392 |
070601 | 原位 On site | 2007-08-30- 2008-08-21 | 257 |
070601 | 移位 Off site | 2007-08-30- 2008-08-21 | 237 |
Table 3 Soil hydrolyzable nitrogen contents of soil of on-site and off-site incubation
样点 Sampling point | 状态 Status | 培养时间 Incubation period | 水解N含量 Hydrolyzable N content (kg·hm-2) |
---|---|---|---|
06 | 原位 On site | 2006-06-28- 2008-08-23 | 441 |
06 | 移位 Off site | 2006-06-28- 2008-08-23 | 392 |
070601 | 原位 On site | 2007-08-30- 2008-08-21 | 257 |
070601 | 移位 Off site | 2007-08-30- 2008-08-21 | 237 |
时期 Period | 分解率 Decomposition ratio (%) |
---|---|
2008-08-24-2008-10-16 | 0.086 |
2008-08-24-2009-07-03 | 0.184 |
2008-08-24-2009-10-14 | 0.373 |
Table 4 Litter decomposition rate of Sanguisorba sitchensis community
时期 Period | 分解率 Decomposition ratio (%) |
---|---|
2008-08-24-2008-10-16 | 0.086 |
2008-08-24-2009-07-03 | 0.184 |
2008-08-24-2009-10-14 | 0.373 |
样点070601 Sampling point 070601 | 2009-07-05 | 2009-08-01 | 2008-08-24 |
---|---|---|---|
密度 Density (stem·m-2) | 392 | 920 | 615 |
高度 Height (cm) | 9 | 50 | 40 |
盖度 Coverage (%) | 76.7 | 100.0 | 98.0 |
单株干重 Individual dry weight (g·stem-1) | 0.072 | 0.353 | 0.637 |
年生长量 Annual growth (kg·hm-2·a-1) | 280 | 3 250 | 3 920 |
Table 5 Structure of Sanguisorba sitchensis community
样点070601 Sampling point 070601 | 2009-07-05 | 2009-08-01 | 2008-08-24 |
---|---|---|---|
密度 Density (stem·m-2) | 392 | 920 | 615 |
高度 Height (cm) | 9 | 50 | 40 |
盖度 Coverage (%) | 76.7 | 100.0 | 98.0 |
单株干重 Individual dry weight (g·stem-1) | 0.072 | 0.353 | 0.637 |
年生长量 Annual growth (kg·hm-2·a-1) | 280 | 3 250 | 3 920 |
采样日期 Sampling date | 地上生物量 Aboveground biomass (kg·hm-2·a-1) | 植物有机C Organic C content in plant (kg·hm-2·a-1) | 植物有机N Organic N content in plant (kg·hm-2·a-1) |
---|---|---|---|
2009-07-05 | 284 | 142 | 11 |
2009-08-01 | 3 247 | 1 624 | 129 |
2008-08-24 | 3 979 | 1 990 | 158 |
2007-08-29 | 4 046 | 2 023 | 161 |
Table 6 Biomass, organic C and N content of Sanguisorba sitchensis community
采样日期 Sampling date | 地上生物量 Aboveground biomass (kg·hm-2·a-1) | 植物有机C Organic C content in plant (kg·hm-2·a-1) | 植物有机N Organic N content in plant (kg·hm-2·a-1) |
---|---|---|---|
2009-07-05 | 284 | 142 | 11 |
2009-08-01 | 3 247 | 1 624 | 129 |
2008-08-24 | 3 979 | 1 990 | 158 |
2007-08-29 | 4 046 | 2 023 | 161 |
样地 Site | 采样日期 Sampling date | 全氮 Total N (g·kg-1) | 有机质 Organic matter (g·kg-1) | 有机碳 Organic C (g·kg-1) | 碳氮比 C/N |
---|---|---|---|---|---|
雪斑 Snowpack | 2007-06-26 | 4.66 | 103 | 59 | 12.77 |
雪斑 Snowpack | 2008-08-22 | 3.74 | 85 | 49 | 13.14 |
雪斑 Snowpack | 2007-10-16 | 2.91 | 60 | 35 | 11.93 |
平均 Mean | 3.77 | 82 | 48 | 12.61 | |
非雪斑 Snow-free | 2007-06-26 | 2.98 | 135 | 78 | 26.32 |
非雪斑 Snow-free | 2008-08-22 | 3.42 | 133 | 77 | 22.59 |
非雪斑 Snow-free | 2007-10-16 | 3.99 | 156 | 90 | 22.66 |
平均 Mean | 3.46 | 141 | 82 | 23.86 |
Table 2 Soil nutrients and organic matter content
样地 Site | 采样日期 Sampling date | 全氮 Total N (g·kg-1) | 有机质 Organic matter (g·kg-1) | 有机碳 Organic C (g·kg-1) | 碳氮比 C/N |
---|---|---|---|---|---|
雪斑 Snowpack | 2007-06-26 | 4.66 | 103 | 59 | 12.77 |
雪斑 Snowpack | 2008-08-22 | 3.74 | 85 | 49 | 13.14 |
雪斑 Snowpack | 2007-10-16 | 2.91 | 60 | 35 | 11.93 |
平均 Mean | 3.77 | 82 | 48 | 12.61 | |
非雪斑 Snow-free | 2007-06-26 | 2.98 | 135 | 78 | 26.32 |
非雪斑 Snow-free | 2008-08-22 | 3.42 | 133 | 77 | 22.59 |
非雪斑 Snow-free | 2007-10-16 | 3.99 | 156 | 90 | 22.66 |
平均 Mean | 3.46 | 141 | 82 | 23.86 |
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