植物生态学报 ›› 2018, Vol. 42 ›› Issue (1): 133-142.DOI: 10.17521/cjpe.2017.0120
所属专题: 青藏高原植物生态学:植物-土壤-微生物
• 研究论文 • 上一篇
苟小林1,2,周青平1,2,*(),陈有军1,2,魏小星1,涂卫国3
出版日期:
2018-01-20
发布日期:
2018-01-18
通讯作者:
周青平
基金资助:
GOU Xiao-Lin1,2,ZHOU Qing-Ping1,2,*(),CHEN You-Jun1,2,WEI Xiao-Xing1,TU Wei-Guo3
Online:
2018-01-20
Published:
2018-01-18
Contact:
Qing-Ping ZHOU
Supported by:
摘要:
为了探究青藏高原寒冷沙地上优势植物及其根际土壤的养分对不同气候的响应过程, 选取半干旱和半湿润沙地上的优势植物中国沙棘(Hippophae rhamnoides subsp. sinensis)和沙蒿(Artemisia desertorum)为对象, 调查自然条件下青藏高原半干旱和半湿润沙地上两种植物枝叶和根的碳、氮、磷含量, 及其根际0-10 cm和10-20 cm土壤的有机碳、全氮、全磷、铵态氮、硝态氮、有效磷含量, 并探讨两种优势植物和根际土壤的养分含量的关系及其影响因子。结果表明, 半干旱和半湿润条件下中国沙棘和沙蒿及其根际土壤的养分差异明显。半干旱和半湿润气候条件下两种植物碳、氮、磷的积累差异显著。半湿润条件下, 沙蒿根际土壤中的有机碳、全氮、铵态氮、硝态氮、有效磷的含量高于半干旱条件, 而中国沙棘根际土壤养分的结果却相反。不同气候条件下, 沙蒿和沙棘的养分和根际土壤的养分显著相关, 两种植物的养分比差异显著, 沙蒿氮磷比与其根际土壤的氮磷比以及中国沙棘的碳氮比与其根际土壤的碳氮比显著负相关。
苟小林, 周青平, 陈有军, 魏小星, 涂卫国. 青藏高原不同气候区高寒沙地两种优势植物及其根际土壤的养分特征. 植物生态学报, 2018, 42(1): 133-142. DOI: 10.17521/cjpe.2017.0120
GOU Xiao-Lin, ZHOU Qing-Ping, CHEN You-Jun, WEI Xiao-Xing, TU Wei-Guo. Characteristics of nutrients in two dominant plant species and rhizospheric soils in alpine desert of the Qinghai-Xizang Plateau under contrasting climates. Chinese Journal of Plant Ecology, 2018, 42(1): 133-142. DOI: 10.17521/cjpe.2017.0120
图1 两种气候条件下植物器官主要养分含量的比较(平均值±标准偏差, n = 3)。*、**和ns分别代表半干旱和半湿润条件下显著性水平小于0.05、小于0.01和不显著。BL, 枝和叶; Root, 根系。SA, 半干旱; SH, 半湿润。
Fig. 1 Comparisons of major nutrients in plant tissues between two different climatic conditions (mean ± SD, n = 3). *, ** and ns indicate that the differences between semi-arid and sub-humid conditions are significant at the levels of 0.05 and 0.01, and not significant, respectively. BL, branches and leaves; Root, roots. SA, semi-arid; SH, semi-humid.
图2 两种气候条件下植物根际土壤主要养分含量和pH值的比较(平均值±标准偏差, n = 3)。**和ns分别代表半干旱和半湿润环境下显著性水平小于0.01和不显著。SA, 半干旱; SH, 半湿润。
Fig. 2 Comparisons of major nutrients and pH value in rhizospheric soils between two different climatic conditions (mean ± SD, n = 3). ** and ns indicate that the differences between semi-arid and sub-humid conditions are significant at the 0.01 level, and not significant, respectively. SA, semi-arid; SH, sub-humid.
图3 两种气候条件下植物根际土壤溶解性养分的比较(平均值±标准偏差, n = 3)。**代表半干旱和半湿润件下显著性水平小于0.01。SA, 半干旱; SH, 半湿润。
Fig. 3 Comparisons of dissolved nutrients in rhizospheric soils between two climatic conditions (mean ± SD, n = 3). ** indicate that the differences between semi-arid and sub-humid conditions are significant at the 0.01 level. SA, semi-arid; SH, sub-humid.
植物或根际土壤类型 Plant or rhizospheric soil | 器官或土层 Tissue or soil layer | 气候 Climate | 碳氮比 C:N (SC:SN) | 碳磷比 C:P (SC:SP) | 氮磷比 N:P (SN:SP) | |||
---|---|---|---|---|---|---|---|---|
M | SD | M | SD | M | SD | |||
沙蒿 Artemisia desertorum | 根 Roots | SA | 39.493b | 0.906 | 199.046b | 5.998 | 5.039a | 0.037 |
SH | 87.596a | 1.527 | 284.528a | 10.402 | 3.247b | 0.063 | ||
枝叶 Branches and leaves | SA | 28.666b | 0.531 | 166.050b | 6.180 | 5.791a | 0.120 | |
SH | 66.201a | 2.762 | 289.091a | 19.047 | 4.366b | 0.175 | ||
中国沙棘 Hippophae rhamnoides subsp. sinensis | 根 Roots | SA | 30.730b | 0.514 | 344.732b | 23.832 | 11.213a | 0.634 |
SH | 38.210a | 0.489 | 425.255a | 38.610 | 11.139a | 1.155 | ||
枝叶 Branches and leaves | SA | 26.596b | 0.755 | 174.307a | 6.129 | 6.561a | 0.384 | |
SH | 32.697a | 0.497 | 178.604a | 7.098 | 5.461b | 0.137 | ||
沙蒿根际土壤 Rhizospheric soil of Artemisia desertorum | 0-10 cm | SA | 7.950a | 0.752 | 11.528b | 1.336 | 1.448b | 0.048 |
SH | 8.481a | 0.519 | 15.761a | 2.008 | 1.860a | 0.215 | ||
10-20 cm | SA | 9.694a | 1.384 | 16.668b | 3.595 | 1.709b | 0.180 | |
SH | 9.233a | 1.247 | 32.617a | 7.558 | 3.540a | 0.787 | ||
中国沙棘根际土壤 Rhizospheric soil of Hippophae rhamnoides subsp. sinensis | 0-10 cm | SA | 16.085a | 0.334 | 25.857a | 1.315 | 1.607a | 0.066 |
SH | 8.266b | 0.440 | 9.920b | 0.242 | 1.202b | 0.061 | ||
10-20 cm | SA | 10.999a | 0.486 | 24.849a | 2.788 | 2.265a | 0.305 | |
SH | 9.567b | 0.303 | 16.118b | 3.423 | 1.679a | 0.309 |
表1 两种气候条件下植物器官及土壤养分比的比较
Table 1 Comparisons of nutrient ratios in tissues and rhizospheric soils between two climatic conditions
植物或根际土壤类型 Plant or rhizospheric soil | 器官或土层 Tissue or soil layer | 气候 Climate | 碳氮比 C:N (SC:SN) | 碳磷比 C:P (SC:SP) | 氮磷比 N:P (SN:SP) | |||
---|---|---|---|---|---|---|---|---|
M | SD | M | SD | M | SD | |||
沙蒿 Artemisia desertorum | 根 Roots | SA | 39.493b | 0.906 | 199.046b | 5.998 | 5.039a | 0.037 |
SH | 87.596a | 1.527 | 284.528a | 10.402 | 3.247b | 0.063 | ||
枝叶 Branches and leaves | SA | 28.666b | 0.531 | 166.050b | 6.180 | 5.791a | 0.120 | |
SH | 66.201a | 2.762 | 289.091a | 19.047 | 4.366b | 0.175 | ||
中国沙棘 Hippophae rhamnoides subsp. sinensis | 根 Roots | SA | 30.730b | 0.514 | 344.732b | 23.832 | 11.213a | 0.634 |
SH | 38.210a | 0.489 | 425.255a | 38.610 | 11.139a | 1.155 | ||
枝叶 Branches and leaves | SA | 26.596b | 0.755 | 174.307a | 6.129 | 6.561a | 0.384 | |
SH | 32.697a | 0.497 | 178.604a | 7.098 | 5.461b | 0.137 | ||
沙蒿根际土壤 Rhizospheric soil of Artemisia desertorum | 0-10 cm | SA | 7.950a | 0.752 | 11.528b | 1.336 | 1.448b | 0.048 |
SH | 8.481a | 0.519 | 15.761a | 2.008 | 1.860a | 0.215 | ||
10-20 cm | SA | 9.694a | 1.384 | 16.668b | 3.595 | 1.709b | 0.180 | |
SH | 9.233a | 1.247 | 32.617a | 7.558 | 3.540a | 0.787 | ||
中国沙棘根际土壤 Rhizospheric soil of Hippophae rhamnoides subsp. sinensis | 0-10 cm | SA | 16.085a | 0.334 | 25.857a | 1.315 | 1.607a | 0.066 |
SH | 8.266b | 0.440 | 9.920b | 0.242 | 1.202b | 0.061 | ||
10-20 cm | SA | 10.999a | 0.486 | 24.849a | 2.788 | 2.265a | 0.305 | |
SH | 9.567b | 0.303 | 16.118b | 3.423 | 1.679a | 0.309 |
土层 Soil layer | 养分 Nutrient | 沙蒿 Artemisia desertorum | 中国沙棘 Hippophae rhamnoides subsp. sinensis | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
枝叶 Branches and leaves | 根 Roots | 枝叶 Branches and leaves | 根 Roots | ||||||||||
C | N | P | C | N | P | C | N | P | C | N | P | ||
0-10 cm | SOC | 0.96** | -0.975** | -0.953** | 0.827* | -0.976** | -0.949** | 0.983*** | 0.992*** | 0.802ns | -0.972** | 0.986*** | 0.765ns |
STN | 0.989*** | -0.985*** | -0.991*** | 0.861* | -0.979** | -0.986*** | 0.979** | 0.968** | 0.799ns | -0.954** | 0.994*** | 0.707ns | |
STP | 0.42ns | -0.348ns | -0.427ns | 0.596ns | -0.333ns | -0.308ns | -0.415ns | -0.654ns | -0.425ns | 0.65ns | -0.481ns | -0.293ns | |
SNN | 0.915* | -0.942** | -0.908* | 0.77ns | -0.951** | -0.926** | 0.982*** | 0.991*** | 0.816* | -0.967** | 0.985*** | 0.768ns | |
SAN | 0.997** | -0.996*** | -0.990*** | 0.906* | -0.993*** | -0.979** | 0.974** | 0.996*** | 0.779ns | -0.98** | 0.978** | 0.752ns | |
SAP | 0.906* | -0.866* | -0.899* | 0.903* | -0.848* | -0.833* | 0.966** | 0.99*** | 0.746ns | -0.974** | 0.968** | 0.712ns | |
10-20 cm | SOC | 0.945** | -0.963** | -0.939** | 0.761ns | -0.96** | -0.955** | 0.982*** | 0.964** | 0.781ns | -0.954** | 0.969** | 0.845* |
STN | 0.995*** | -0.996*** | -0.997*** | 0.867* | -0.994*** | -0.994*** | 0.982*** | 0.958** | 0.813* | -0.931** | 0.963** | 0.849* | |
STP | 0.239ns | -0.193ns | -0.192ns | 0.615ns | -0.185ns | -0.112ns | 0.576ns | 0.703ns | 0.376ns | -0.77ns | 0.664ns | 0.253ns | |
SNN | 0.993*** | -0.999*** | -0.987*** | 0.875* | -0.997*** | -0.987*** | 0.991*** | 0.983*** | 0.798ns | -0.97** | 0.995*** | 0.761ns | |
SAN | 0.994*** | -0.996*** | -0.986*** | 0.9* | -0.995*** | -0.979** | 0.963** | 0.99*** | 0.732ns | -0.98** | 0.961** | 0.738ns | |
SAP | 0.986*** | -0.98** | -0.989*** | 0.902* | -0.977** | -0.982** | 0.933** | 0.994*** | 0.75ns | -0.993** | 0.956** | 0.714ns |
表2 两种植物养分含量与土壤养分含量之间的相关系数
Table 2 Pearson’s correlations of nutrients between plant tissues and rhizospheric soils
土层 Soil layer | 养分 Nutrient | 沙蒿 Artemisia desertorum | 中国沙棘 Hippophae rhamnoides subsp. sinensis | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
枝叶 Branches and leaves | 根 Roots | 枝叶 Branches and leaves | 根 Roots | ||||||||||
C | N | P | C | N | P | C | N | P | C | N | P | ||
0-10 cm | SOC | 0.96** | -0.975** | -0.953** | 0.827* | -0.976** | -0.949** | 0.983*** | 0.992*** | 0.802ns | -0.972** | 0.986*** | 0.765ns |
STN | 0.989*** | -0.985*** | -0.991*** | 0.861* | -0.979** | -0.986*** | 0.979** | 0.968** | 0.799ns | -0.954** | 0.994*** | 0.707ns | |
STP | 0.42ns | -0.348ns | -0.427ns | 0.596ns | -0.333ns | -0.308ns | -0.415ns | -0.654ns | -0.425ns | 0.65ns | -0.481ns | -0.293ns | |
SNN | 0.915* | -0.942** | -0.908* | 0.77ns | -0.951** | -0.926** | 0.982*** | 0.991*** | 0.816* | -0.967** | 0.985*** | 0.768ns | |
SAN | 0.997** | -0.996*** | -0.990*** | 0.906* | -0.993*** | -0.979** | 0.974** | 0.996*** | 0.779ns | -0.98** | 0.978** | 0.752ns | |
SAP | 0.906* | -0.866* | -0.899* | 0.903* | -0.848* | -0.833* | 0.966** | 0.99*** | 0.746ns | -0.974** | 0.968** | 0.712ns | |
10-20 cm | SOC | 0.945** | -0.963** | -0.939** | 0.761ns | -0.96** | -0.955** | 0.982*** | 0.964** | 0.781ns | -0.954** | 0.969** | 0.845* |
STN | 0.995*** | -0.996*** | -0.997*** | 0.867* | -0.994*** | -0.994*** | 0.982*** | 0.958** | 0.813* | -0.931** | 0.963** | 0.849* | |
STP | 0.239ns | -0.193ns | -0.192ns | 0.615ns | -0.185ns | -0.112ns | 0.576ns | 0.703ns | 0.376ns | -0.77ns | 0.664ns | 0.253ns | |
SNN | 0.993*** | -0.999*** | -0.987*** | 0.875* | -0.997*** | -0.987*** | 0.991*** | 0.983*** | 0.798ns | -0.97** | 0.995*** | 0.761ns | |
SAN | 0.994*** | -0.996*** | -0.986*** | 0.9* | -0.995*** | -0.979** | 0.963** | 0.99*** | 0.732ns | -0.98** | 0.961** | 0.738ns | |
SAP | 0.986*** | -0.98** | -0.989*** | 0.902* | -0.977** | -0.982** | 0.933** | 0.994*** | 0.75ns | -0.993** | 0.956** | 0.714ns |
植物 Plant | 土层 Soil layer (cm) | 养分比 Nutrient ratio | 枝叶 Branches and leaves | 根 Roots | ||||
---|---|---|---|---|---|---|---|---|
C:N | C:P | N:P | C:N | C:P | N:P | |||
沙蒿 Artemisia desertorum | 0-10 | SC:SN | 0.397ns | 0.332ns | -0.505ns | 0.422ns | 0.336ns | -0.482ns |
SC:SP | 0.826* | 0.758ns | -0.901* | 0.833* | 0.807ns | -0.842* | ||
SN:SP | 0.864* | 0.814* | -0.902* | 0.86* | 0.87* | -0.843* | ||
10-20 | SC:SN | -0.218ns | -0.29ns | 0.114ns | -0.22ns | -0.261ns | 0.189ns | |
SC:SP | 0.884* | 0.869* | -0.865* | 0.866* | 0.89* | -0.843* | ||
SN:SP | 0.923** | 0.937* | -0.865* | 0.906* | 0.94** | -0.873* | ||
中国沙棘 Hippophae rhamnoides subsp. sinensis | 0-10 | SC:SN | -0.983*** | -0.358ns | 0.919* | -0.983*** | -0.85* | 0.015ns |
SC:SP | -0.993*** | -0.35ns | 0.938** | -0.981** | -0.815* | 0.076ns | ||
SN:SP | -0.991*** | -0.369ns | 0.933** | -0.959** | -0.738ns | 0.183ns | ||
10-20 | SC:SN | -0.892* | -0.152ns | 0.895* | -0.907* | -0.862* | -0.118ns | |
SC:SP | -0.8ns | -0.359ns | 0.709ns | -0.843* | -0.909* | -0.316ns | ||
SN:SP | -0.689ns | -0.373ns | 0.583ns | -0.731ns | -0.843* | -0.374ns |
表3 气候条件下植物器官及根际土壤的养分比的相关系数
Table 3 Pearson’s correlations of nutrient ratios between plant tissues and rhizospheric soils under two climatic conditions
植物 Plant | 土层 Soil layer (cm) | 养分比 Nutrient ratio | 枝叶 Branches and leaves | 根 Roots | ||||
---|---|---|---|---|---|---|---|---|
C:N | C:P | N:P | C:N | C:P | N:P | |||
沙蒿 Artemisia desertorum | 0-10 | SC:SN | 0.397ns | 0.332ns | -0.505ns | 0.422ns | 0.336ns | -0.482ns |
SC:SP | 0.826* | 0.758ns | -0.901* | 0.833* | 0.807ns | -0.842* | ||
SN:SP | 0.864* | 0.814* | -0.902* | 0.86* | 0.87* | -0.843* | ||
10-20 | SC:SN | -0.218ns | -0.29ns | 0.114ns | -0.22ns | -0.261ns | 0.189ns | |
SC:SP | 0.884* | 0.869* | -0.865* | 0.866* | 0.89* | -0.843* | ||
SN:SP | 0.923** | 0.937* | -0.865* | 0.906* | 0.94** | -0.873* | ||
中国沙棘 Hippophae rhamnoides subsp. sinensis | 0-10 | SC:SN | -0.983*** | -0.358ns | 0.919* | -0.983*** | -0.85* | 0.015ns |
SC:SP | -0.993*** | -0.35ns | 0.938** | -0.981** | -0.815* | 0.076ns | ||
SN:SP | -0.991*** | -0.369ns | 0.933** | -0.959** | -0.738ns | 0.183ns | ||
10-20 | SC:SN | -0.892* | -0.152ns | 0.895* | -0.907* | -0.862* | -0.118ns | |
SC:SP | -0.8ns | -0.359ns | 0.709ns | -0.843* | -0.909* | -0.316ns | ||
SN:SP | -0.689ns | -0.373ns | 0.583ns | -0.731ns | -0.843* | -0.374ns |
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