植物生态学报 ›› 2014, Vol. 38 ›› Issue (9): 941-948.DOI: 10.3724/SP.J.1258.2014.00088
所属专题: 生态化学计量
收稿日期:
2014-02-24
接受日期:
2014-07-25
出版日期:
2014-02-24
发布日期:
2014-09-22
通讯作者:
周玉梅
基金资助:
JIANG Xiao-Jie1,HU Yan-Ling2,HAN Jian-Qiu1,ZHOU Yu-Mei1,*()
Received:
2014-02-24
Accepted:
2014-07-25
Online:
2014-02-24
Published:
2014-09-22
Contact:
ZHOU Yu-Mei
摘要:
为探讨苔原植被对气候变暖的响应模式, 采用开顶箱增温法, 研究了3个生长季增温对长白山苔原3种代表植物——牛皮杜鹃(Rhododendron aureum)、笃斯越桔(Vaccinium uliginosum)和东亚仙女木(Dryas octopetala var. asiatica)的叶片及土壤碳(C)、氮(N)、磷(P)含量及其比值的影响。结果表明: 增温使土壤N和P的含量分别增加5.88%和4.83%, C含量降低13.19%; 增温和对照(不增温)条件下, 植物叶片的C、N、P含量及其比值在生长季有明显的变化。增温使笃斯越桔和东亚仙女木叶片的P含量分别增加10.34%和12.87%, 牛皮杜鹃则降低了16.26%, 增温并没有明显改变3种植物叶片的C、N含量, 但牛皮杜鹃和东亚仙女木叶片的C:N值在增温条件下呈现增加趋势。增温使土壤可利用的N、P含量增加。增温对3种植物的C:N值, 牛皮杜鹃、笃斯越桔的P含量, 以及东亚仙女木的C:P值都产生了显著的影响。结果表明增温增加了长白山苔原P元素对植物生长的限制, 且3种植物叶片的C、N、P化学计量学特性对增温的响应模式和尺度没有表现出一致性。
江肖洁,胡艳玲,韩建秋,周玉梅. 增温对苔原土壤和典型植物叶片碳、氮、磷化学计量学特征的影响. 植物生态学报, 2014, 38(9): 941-948. DOI: 10.3724/SP.J.1258.2014.00088
JIANG Xiao-Jie,HU Yan-Ling,HAN Jian-Qiu,ZHOU Yu-Mei. Effects of warming on carbon, nitrogen and phosphorus stoichiometry in tundra soil and leaves of typical plants. Chinese Journal of Plant Ecology, 2014, 38(9): 941-948. DOI: 10.3724/SP.J.1258.2014.00088
开顶箱 Open-top chamber | 对照样地 Control plot | 差值 Difference | |
---|---|---|---|
空气温度 Air temperature (°C) | 24.13 | 22.72 | +1.41 |
空气相对湿度 Air relative humidity (%) | 86.56 | 85.37 | +1.19 |
地下5 cm土壤温度 Soil temperature at 5 cm depth (°C) | 22.66 | 20.92 | +1.74 |
地下10 cm土壤温度 Soil temperature at 10 cm depth (°C) | 21.74 | 19.96 | +1.78 |
表1 生长季增温与对照条件下空气温度、空气相对湿度、地下5 cm和10 cm土壤温度
Table 1 Air temperature, air relative humidity, soil temperature at 5 cm and 10 cm depths in the open-top chambers and control plots during growing season
开顶箱 Open-top chamber | 对照样地 Control plot | 差值 Difference | |
---|---|---|---|
空气温度 Air temperature (°C) | 24.13 | 22.72 | +1.41 |
空气相对湿度 Air relative humidity (%) | 86.56 | 85.37 | +1.19 |
地下5 cm土壤温度 Soil temperature at 5 cm depth (°C) | 22.66 | 20.92 | +1.74 |
地下10 cm土壤温度 Soil temperature at 10 cm depth (°C) | 21.74 | 19.96 | +1.78 |
开顶箱 Open-top chamber | 对照样地 Control plot | |
---|---|---|
总碳含量 Total carbon content (%) | 6.14 ± 3.12A | 6.95 ± 2.07B |
总氮含量 Total nitrogen content (%) | 0.40 ± 0.09A | 0.37 ± 0.03B |
总磷含量 Total phosphorus content (%) | 0.56 ± 0.11A | 0.54 ± 0.03B |
表2 增温与对照条件下土壤碳(C)、氮(N)、磷(P)含量(平均值±标准偏差)
Table 2 Contents of carbon (C), nitrogen (N) and phosphorus (P) of soil in open-top chambers and control plots (mean ± SD)
开顶箱 Open-top chamber | 对照样地 Control plot | |
---|---|---|
总碳含量 Total carbon content (%) | 6.14 ± 3.12A | 6.95 ± 2.07B |
总氮含量 Total nitrogen content (%) | 0.40 ± 0.09A | 0.37 ± 0.03B |
总磷含量 Total phosphorus content (%) | 0.56 ± 0.11A | 0.54 ± 0.03B |
变异来源 Source of variation | C | N | P | C:N | C:P | N:P |
---|---|---|---|---|---|---|
牛皮杜鹃 Rhododendron aureum | ||||||
增温 Warming (W) | ns | ns | * | * | ns | ns |
月份 Month (M) | ** | ** | ** | ** | ** | ** |
增温×月份 W × M | ns | ns | ** | ns | * | * |
笃斯越桔 Vaccinium uliginosum | ||||||
增温 Warming (W) | ns | ns | * | * | ns | ns |
月份 Month (M) | ** | ** | ** | ** | ** | ** |
增温×月份 W × M | ns | ns | ** | ns | * | * |
东亚仙女木 Dryas octopetala var. asiatica | ||||||
增温 Warming (W) | ns | ns | ns | * | * | ns |
月份 Month (M) | ** | ** | ** | ** | ** | ** |
增温×月份 W × M | ns | ns | ** | ns | * | * |
表3 双因素方差法分析增温、月份对牛皮杜鹃、笃斯越桔和东亚仙女木叶片碳(C)、氮(N)、磷(P)含量及其比值的影响
Table 3 Effects of warming and month on carbon (C), nitrogen (N) and phosphorus (P) contents and their ratios in leaves of Rhododendron aureum, Vaccinium uliginosum and Dryas octopetala var. asiatica using two-way ANOVA
变异来源 Source of variation | C | N | P | C:N | C:P | N:P |
---|---|---|---|---|---|---|
牛皮杜鹃 Rhododendron aureum | ||||||
增温 Warming (W) | ns | ns | * | * | ns | ns |
月份 Month (M) | ** | ** | ** | ** | ** | ** |
增温×月份 W × M | ns | ns | ** | ns | * | * |
笃斯越桔 Vaccinium uliginosum | ||||||
增温 Warming (W) | ns | ns | * | * | ns | ns |
月份 Month (M) | ** | ** | ** | ** | ** | ** |
增温×月份 W × M | ns | ns | ** | ns | * | * |
东亚仙女木 Dryas octopetala var. asiatica | ||||||
增温 Warming (W) | ns | ns | ns | * | * | ns |
月份 Month (M) | ** | ** | ** | ** | ** | ** |
增温×月份 W × M | ns | ns | ** | ns | * | * |
图1 生长季增温与对照条件下牛皮杜鹃、笃斯越桔和东亚仙女木叶片碳(C)、氮(N)、磷(P)含量(平均值±标准偏差)。不同字母表示每个月份不同处理间差异显著(p < 0.05)。
Fig. 1 Carbon (C), nitrogen (N) and phosphorus (P) contents in leaves of Vaccinium uliginosum, Rhododendron aureum, and Dryas octopetala var. asiatica grown in open top chambers (OTC) and control plots during growing season (mean ± SD). Different letters indicate significant difference between OTC and control in the same month at the level of 0.05.
月份 Month | C:N | C:P | N:P | ||||||
---|---|---|---|---|---|---|---|---|---|
开顶箱 Open-top chamber | 对照样地 Control plot | 开顶箱 Open-top chamber | 对照样地 Control plot | 开顶箱 Open-top chamber | 对照样地 Control plot | ||||
牛皮杜鹃 Rhododendron aureum | 7 | 20.02 ± 0.23A | 9.11 ± 0.92B | 513.78 ± 8.41A | 346.75 ± 1.19B | 27.57 ± 1.19A | 38.45 ± 4.00B | ||
8 | 32.16 ± 2.69A | 27.73 ± 0.20B | 326.42 ± 19.08A | 281.95 ± 11.56B | 11.14 ± 0.50A | 10.54 ± 0.40B | |||
9 | 27.14 ± 0.17A | 22.68 ± 0.91B | 246.72 ± 1.32A | 223.45 ± 0.14B | 9.09 ± 0.03A | 10.20 ± 0.19B | |||
笃斯越桔 Vaccinium Uliginosum | 7 | 14.79 ± 0.72A | 21.31 ± 0.30B | 424.96 ± 17.46A | 457.97 ± 11.19B | 33.63 ± 1.43A | 20.70 ± 0.07B | ||
8 | 37.60 ± 0.81A | 32.28 ± 0.13B | 344.74 ± 7.67A | 376.66 ± 1.67B | 9.53 ± 0.49A | 11.86 ± 0.16B | |||
9 | 20.21 ± 1.19A | 24.57 ± 0.08B | 460.24 ± 18.50A | 530.88 ± 41.74B | 20.66 ± 1.66A | 23.52 ± 0.60B | |||
东亚仙女木 Dryas octopetala var. asiatica | 7 | 16.66 ± 0.10A | 13.70 ± 0.10B | 309.90 ± 4.85A | 375.65 ± 0.68B | 19.36 ± 1.15A | 27.42 ± 0.05B | ||
8 | 27.43 ± 0.38A | 26.20 ± 0.32B | 207.67 ± 3.59A | 263.74 ± 3.10B | 7.57 ± 0.14A | 10.18 ± 0.05B | |||
9 | 28.49 ± 1.02A | 22.60 ± 0.60B | 365.14 ± 0.03A | 317.03 ± 11.65B | 12.13 ± 0.24A | 15.80 ± 0.86B |
表4 生长季增温与对照条件下牛皮杜鹃、笃斯越桔和东亚仙女木叶片C:N、C:P、N:P比值(平均值±标准偏差)
Table 4 C:N, C:P, and N:P ratios in Vaccinium uliginosum, Rhododendron aureum, and Dryas octopetala var. asiatica grown in open top chambers and control plots during growing season (mean ± SD)
月份 Month | C:N | C:P | N:P | ||||||
---|---|---|---|---|---|---|---|---|---|
开顶箱 Open-top chamber | 对照样地 Control plot | 开顶箱 Open-top chamber | 对照样地 Control plot | 开顶箱 Open-top chamber | 对照样地 Control plot | ||||
牛皮杜鹃 Rhododendron aureum | 7 | 20.02 ± 0.23A | 9.11 ± 0.92B | 513.78 ± 8.41A | 346.75 ± 1.19B | 27.57 ± 1.19A | 38.45 ± 4.00B | ||
8 | 32.16 ± 2.69A | 27.73 ± 0.20B | 326.42 ± 19.08A | 281.95 ± 11.56B | 11.14 ± 0.50A | 10.54 ± 0.40B | |||
9 | 27.14 ± 0.17A | 22.68 ± 0.91B | 246.72 ± 1.32A | 223.45 ± 0.14B | 9.09 ± 0.03A | 10.20 ± 0.19B | |||
笃斯越桔 Vaccinium Uliginosum | 7 | 14.79 ± 0.72A | 21.31 ± 0.30B | 424.96 ± 17.46A | 457.97 ± 11.19B | 33.63 ± 1.43A | 20.70 ± 0.07B | ||
8 | 37.60 ± 0.81A | 32.28 ± 0.13B | 344.74 ± 7.67A | 376.66 ± 1.67B | 9.53 ± 0.49A | 11.86 ± 0.16B | |||
9 | 20.21 ± 1.19A | 24.57 ± 0.08B | 460.24 ± 18.50A | 530.88 ± 41.74B | 20.66 ± 1.66A | 23.52 ± 0.60B | |||
东亚仙女木 Dryas octopetala var. asiatica | 7 | 16.66 ± 0.10A | 13.70 ± 0.10B | 309.90 ± 4.85A | 375.65 ± 0.68B | 19.36 ± 1.15A | 27.42 ± 0.05B | ||
8 | 27.43 ± 0.38A | 26.20 ± 0.32B | 207.67 ± 3.59A | 263.74 ± 3.10B | 7.57 ± 0.14A | 10.18 ± 0.05B | |||
9 | 28.49 ± 1.02A | 22.60 ± 0.60B | 365.14 ± 0.03A | 317.03 ± 11.65B | 12.13 ± 0.24A | 15.80 ± 0.86B |
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