植物生态学报 ›› 2023, Vol. 47 ›› Issue (4): 546-558.DOI: 10.17521/cjpe.2022.0066
刘婧1, 缑倩倩1,2,*(), 王国华1,2,3, 赵峰侠1
收稿日期:
2022-02-17
接受日期:
2022-07-06
出版日期:
2023-04-20
发布日期:
2022-07-15
通讯作者:
*(gqqqianqian@163.com)
基金资助:
LIU Jing1, GOU Qian-Qian1,2,*(), WANG Guo-Hua1,2,3, ZHAO Feng-Xia1
Received:
2022-02-17
Accepted:
2022-07-06
Online:
2023-04-20
Published:
2022-07-15
Contact:
*(gqqqianqian@163.com)
Supported by:
摘要:
柠条锦鸡儿(Caragana korshinskii)是晋西北丘陵风沙区主要的退耕还林植物, 在维持群落物种多样性、生态系统稳定和土壤环境恢复等方面发挥着非常重要的作用。为探究不同林龄柠条锦鸡儿人工林生态系统碳(C)、氮(N)、磷(P)化学计量特征与叶片光合作用和土壤环境因子之间的相互关系, 该研究以晋西北丘陵风沙区不同林龄(0、6、12、18、40和50年)柠条锦鸡儿人工林植物叶片和土壤为研究对象, 分析了柠条锦鸡儿叶片和土壤C、N、P化学计量的变化特征及其相互关系。结果表明: 1)随着林龄的增加, 柠条锦鸡儿叶片C、N含量显著增加, P含量呈先增加后减少的趋势, 叶片的C、N、P含量分别在434.14-452.26、15.72-28.11、1.32-1.95 g·kg-1之间, 其中叶片C、N含量均在林龄50年达到最大值, 而叶片P含量在林龄18年达到最大值; 叶片C:N呈先增加后减少的趋势, 林龄18年达到最大值, N:P呈显著增加趋势, 林龄50年达到最大值。叶片的光合色素(叶绿素a、叶绿素b、类胡萝卜素和总叶绿素含量)随着林龄增加呈显著下降的趋势, 叶片的C、N含量对光合色素含量变化具有显著的影响。2) 土壤含水量在0-20 cm土层呈先增加后减少趋势, 尤其在林龄18年之后显著下降; 0-20 cm土层中的土壤有机碳(SOC)和全氮(STN)含量随着林龄的增加而增加, 土壤全磷(STP)含量无显著变化。土壤C:N、C:P和N:P随着林龄的增加呈增加的趋势。3)柠条锦鸡儿人工林土壤含水量与SOC和STN含量具有显著正相关关系, SOC和STN含量之间也呈显著的正相关关系; 柠条锦鸡儿叶片N和P含量具有显著正相关关系; 叶片C、N含量与土壤SOC、STN、STP含量之间均呈显著正相关关系, 与土壤含水量呈负相关关系, 叶片化学计量比与土壤化学计量比之间呈显著正相关关系。随着林龄的增加, 柠条锦鸡儿人工林主要受P含量及土壤含水量的影响。该研究结果对系统了解柠条锦鸡儿人工林生态系统的养分变化, 养分调控和抚育管理具有指导意义。
刘婧, 缑倩倩, 王国华, 赵峰侠. 晋西北丘陵风沙区柠条锦鸡儿叶片与土壤生态化学计量特征. 植物生态学报, 2023, 47(4): 546-558. DOI: 10.17521/cjpe.2022.0066
LIU Jing, GOU Qian-Qian, WANG Guo-Hua, ZHAO Feng-Xia. Leaf and soil ecological stoichiometry of Caragana korshinskii in windy and sandy hilly region of northwest Shanxi, China. Chinese Journal of Plant Ecology, 2023, 47(4): 546-558. DOI: 10.17521/cjpe.2022.0066
林龄 Forest age (a) | 经度 Longitude (E) | 纬度 Latitude (N) | 海拔 Altitude (m) | 坡向 Aspect | 坡度 Slope degree (°) | 株高 Plant height (cm) | 生物量 Biomass (kg·m-2) | 郁闭度 Crown density |
---|---|---|---|---|---|---|---|---|
0 (撂荒地) 0 (Abandoned land) | 111.78° | 38.96° | 1 446 | |||||
111.78° | 38.96° | 1 433 | ||||||
111.74° | 38.99° | 1 440 | ||||||
6 | 111.79° | 38.96° | 1 392 | 南 South | 6 | 104.00 ± 15.18a | 0.61 ± 0.22a | 0.06 |
111.79° | 38.97° | 1 390 | 107.00 ± 8.78a | 0.37 ± 0.11a | 0.05 | |||
111.79° | 38.97° | 1 389 | 97.17 ± 5.04a | 0.38 ± 0.12a | 0.04 | |||
平均 Mean | 102.72 ± 9.67a | 0.45 ± 0.15a | 0.05 | |||||
12 | 111.78° | 38.97° | 1 433 | 东南 Southeast | 4 | 138.57 ± 8.00abc | 1.47 ± 0.12ab | 0.73 |
111.77° | 38.77° | 1 440 | 133.15 ± 6.85ab | 1.94 ± 0.85abc | 0.78 | |||
111.76° | 38.98° | 1 446 | 141.65 ± 6.30abc | 0.92 ± 0.18a | 0.61 | |||
平均 Mean | 137.79 ± 7.05abc | 1.44 ± 0.38ab | 0.71 | |||||
18 | 111.77° | 38.98° | 1 435 | 东南 Southeast | 5 | 201.50 ± 12.12cde | 5.02 ± 2.36abcde | 1.05 |
111.78° | 38.98° | 1 447 | 183.92 ± 11.11cde | 2.32 ± 0.44abc | 1.08 | |||
111.78° | 38.98° | 1 453 | 188.48 ± 15.42cde | 4.62 ± 0.89abcd | 1.06 | |||
总计 Total | 191.30 ± 12.88cde | 3.99 ± 1.23abc | 1.06 | |||||
40 | 111.78° | 38.97° | 1 323 | 南 South | 4 | 221.04 ± 8.15e | 7.00 ± 0.98bcdef | 0.98 |
111.79° | 38.97° | 1 396 | 198.00 ± 9.87bcde | 6.83 ± 0.28bcdef | 1.14 | |||
111.79° | 38.97° | 1 404 | 204.22 ± 7.74bcd | 4.69 ± 1.35abcd | 1.23 | |||
平均 Mean | 207.75 ± 8.59bcd | 6.17 ± 0.87bcdef | 1.12 | |||||
50 | 111.78° | 38.98° | 1 428 | 南 South | 4 | 218.17 ± 5.42de | 10.37 ± 6.05def | 1.11 |
111.78° | 38.98° | 1 448 | 237.32 ± 3.81de | 7.70 ± 1.66cdef | 1.07 | |||
111.78° | 38.97° | 1 472 | 225.38 ± 7.65de | 7.43 ± 0.71cdef | 1.05 | |||
平均 Mean | 226.96 ± 5.63de | 8.05 ± 2.81cdef | 1.08 |
表1 晋西北丘陵风沙区柠条锦鸡儿林调查样地基本情况(平均值±标准误)
Table 1 Basic information of the experimental plots of Caragana korshinskii forest in windy and sandy hilly region of northwest Shanxi (mean ± SE)
林龄 Forest age (a) | 经度 Longitude (E) | 纬度 Latitude (N) | 海拔 Altitude (m) | 坡向 Aspect | 坡度 Slope degree (°) | 株高 Plant height (cm) | 生物量 Biomass (kg·m-2) | 郁闭度 Crown density |
---|---|---|---|---|---|---|---|---|
0 (撂荒地) 0 (Abandoned land) | 111.78° | 38.96° | 1 446 | |||||
111.78° | 38.96° | 1 433 | ||||||
111.74° | 38.99° | 1 440 | ||||||
6 | 111.79° | 38.96° | 1 392 | 南 South | 6 | 104.00 ± 15.18a | 0.61 ± 0.22a | 0.06 |
111.79° | 38.97° | 1 390 | 107.00 ± 8.78a | 0.37 ± 0.11a | 0.05 | |||
111.79° | 38.97° | 1 389 | 97.17 ± 5.04a | 0.38 ± 0.12a | 0.04 | |||
平均 Mean | 102.72 ± 9.67a | 0.45 ± 0.15a | 0.05 | |||||
12 | 111.78° | 38.97° | 1 433 | 东南 Southeast | 4 | 138.57 ± 8.00abc | 1.47 ± 0.12ab | 0.73 |
111.77° | 38.77° | 1 440 | 133.15 ± 6.85ab | 1.94 ± 0.85abc | 0.78 | |||
111.76° | 38.98° | 1 446 | 141.65 ± 6.30abc | 0.92 ± 0.18a | 0.61 | |||
平均 Mean | 137.79 ± 7.05abc | 1.44 ± 0.38ab | 0.71 | |||||
18 | 111.77° | 38.98° | 1 435 | 东南 Southeast | 5 | 201.50 ± 12.12cde | 5.02 ± 2.36abcde | 1.05 |
111.78° | 38.98° | 1 447 | 183.92 ± 11.11cde | 2.32 ± 0.44abc | 1.08 | |||
111.78° | 38.98° | 1 453 | 188.48 ± 15.42cde | 4.62 ± 0.89abcd | 1.06 | |||
总计 Total | 191.30 ± 12.88cde | 3.99 ± 1.23abc | 1.06 | |||||
40 | 111.78° | 38.97° | 1 323 | 南 South | 4 | 221.04 ± 8.15e | 7.00 ± 0.98bcdef | 0.98 |
111.79° | 38.97° | 1 396 | 198.00 ± 9.87bcde | 6.83 ± 0.28bcdef | 1.14 | |||
111.79° | 38.97° | 1 404 | 204.22 ± 7.74bcd | 4.69 ± 1.35abcd | 1.23 | |||
平均 Mean | 207.75 ± 8.59bcd | 6.17 ± 0.87bcdef | 1.12 | |||||
50 | 111.78° | 38.98° | 1 428 | 南 South | 4 | 218.17 ± 5.42de | 10.37 ± 6.05def | 1.11 |
111.78° | 38.98° | 1 448 | 237.32 ± 3.81de | 7.70 ± 1.66cdef | 1.07 | |||
111.78° | 38.97° | 1 472 | 225.38 ± 7.65de | 7.43 ± 0.71cdef | 1.05 | |||
平均 Mean | 226.96 ± 5.63de | 8.05 ± 2.81cdef | 1.08 |
图1 晋西北丘陵风沙区不同林龄柠条锦鸡儿叶片碳、氮、磷含量及化学计量特征(平均值±标准误)。 不同小写字母表示林龄间差异显著(p < 0.05)。
Fig. 1 Leaf carbon (C), nitrogen (N), phosphorus (P) contents and stoichiometric characteristics of Caragana korshinskii at different stand ages in windy and sandy hilly region of northwest Shanxi (mean ± SE). Different lowercase letters indicate significant differences among stand ages (p < 0.05).
林龄 Forest age (a) | 叶绿素a Chlorophyll a (mg·kg-1) | 叶绿素b Chlorophyll b (mg·kg-1) | 类胡萝卜素 Carotenoids (mg·kg-1) | 总叶绿素 Total chlorophyll (mg·kg-1) |
---|---|---|---|---|
6 | 1.74 ± 0.041a | 0.58 ± 0.017a | 0.37 ± 0.005a | 2.32 ± 0.058a |
12 | 1.45 ± 0.051ab | 0.52 ± 0.029ab | 0.27 ± 0.007b | 1.95 ± 0.075ab |
18 | 1.28 ± 0.051b | 0.50 ± 0.026b | 0.23 ± 0.009b | 1.80 ± 0.076ab |
40 | 1.18 ± 0.063b | 0.47 ± 0.032b | 0.22 ± 0.007b | 1.65 ± 0.093b |
50 | 1.02 ± 0.049b | 0.39 ± 0.022b | 0.23 ± 0.008b | 1.40 ± 0.070b |
表2 晋西北丘陵风沙区不同林龄人工柠条锦鸡儿叶片光合色素含量特征(平均值±标准误)
Table 2 Characteristics of photosynthetic pigments content in leaves of Caragana korshinskii at different ages in the windy and sandy hilly region of northwest Shanxi (mean ± SE)
林龄 Forest age (a) | 叶绿素a Chlorophyll a (mg·kg-1) | 叶绿素b Chlorophyll b (mg·kg-1) | 类胡萝卜素 Carotenoids (mg·kg-1) | 总叶绿素 Total chlorophyll (mg·kg-1) |
---|---|---|---|---|
6 | 1.74 ± 0.041a | 0.58 ± 0.017a | 0.37 ± 0.005a | 2.32 ± 0.058a |
12 | 1.45 ± 0.051ab | 0.52 ± 0.029ab | 0.27 ± 0.007b | 1.95 ± 0.075ab |
18 | 1.28 ± 0.051b | 0.50 ± 0.026b | 0.23 ± 0.009b | 1.80 ± 0.076ab |
40 | 1.18 ± 0.063b | 0.47 ± 0.032b | 0.22 ± 0.007b | 1.65 ± 0.093b |
50 | 1.02 ± 0.049b | 0.39 ± 0.022b | 0.23 ± 0.008b | 1.40 ± 0.070b |
图2 晋西北丘陵风沙区柠条锦鸡儿叶片化学计量特征与光合色素含量相关性分析。
Fig. 2 Relationships between leaf stoichiometry and photosynthetic pigments contents of Caragana korshinskii forests in the windy and sandy hilly region of northwest Shanxi.
图3 晋西北丘陵风沙区不同林龄柠条锦鸡儿林土壤含水量变化。 A-E, 林龄分别是6、12、18、40、50年。F为撂荒地(0年)。
Fig. 3 Changes in soil water content of Caragana korshinskii forest of different ages in the windy and sandy hilly region of northwest Shanxi. A-E, the stands are 6, 12, 18, 40 and 50 years old respectively. F is abandoned land (0 a).
图4 晋西北丘陵风沙区不同林龄柠条锦鸡儿人工林土壤碳氮磷含量及化学计量特征(平均值±标准误)。 不同小写字母表示林龄间差异显著(p < 0.05)。
Fig. 4 Soil carbon (C), nitrogen (N), phosphorus (P) contents and stoichiometric characteristics of artificial Caragana korshinskii forests at different ages in the windy and sandy hilly region of northwest Shanxi (mean ± SE). Different lowercase letters indicate significant difference among stand ages (p < 0.05). SOC, soil organic carbon; STN, soil total nitrogen; STP, soil total phosphorus.
含水量 SWC | 有机碳含量 SOC content | 全氮含量 STN content | 全磷含量 STP content | C:N | C:P | N:P | |
---|---|---|---|---|---|---|---|
含水量 SWC | 1 | ||||||
有机碳含量 SOC content | 0.412* | 1 | |||||
全氮含量 STN content | 0.559** | 0.357** | 1 | ||||
全磷含量 STP content | 0.614** | 0.033 | 0.298* | 1 | |||
C:N | -0.223* | 0.295* | -0.276* | -0.188 | 1 | ||
C:P | 0.034 | 0.653** | 0.167 | -0.323* | 0.271* | 1 | |
N:P | 0.023 | 0.485** | 0.377** | -0.257* | 0.222* | 0.889** | 1 |
表3 晋西北丘陵风沙区柠条锦鸡儿人工林土壤含水量、碳(C)、氮(N)、磷(P)含量及化学计量比之间的相关分析
Table 3 Correlation analysis of the soil water content (SWC), carbon (C), nitrogen (N), phosphorus (P) contents and stoichiometric ratio in the artificial Caragana korshinskii forest in the windy and sandy hilly region of northwest Shanxi
含水量 SWC | 有机碳含量 SOC content | 全氮含量 STN content | 全磷含量 STP content | C:N | C:P | N:P | |
---|---|---|---|---|---|---|---|
含水量 SWC | 1 | ||||||
有机碳含量 SOC content | 0.412* | 1 | |||||
全氮含量 STN content | 0.559** | 0.357** | 1 | ||||
全磷含量 STP content | 0.614** | 0.033 | 0.298* | 1 | |||
C:N | -0.223* | 0.295* | -0.276* | -0.188 | 1 | ||
C:P | 0.034 | 0.653** | 0.167 | -0.323* | 0.271* | 1 | |
N:P | 0.023 | 0.485** | 0.377** | -0.257* | 0.222* | 0.889** | 1 |
C | N | P | C:N | C:P | N:P | |
---|---|---|---|---|---|---|
C | 1 | |||||
N | 0.145 | 1 | ||||
P | 0.077 | -0.262* | 1 | |||
C:N | 0.014 | -0.913** | 0.221* | 1 | ||
C:P | 0.103 | 0.750* | -0.782* | -0.645 | 1 | |
N:P | 0.066 | 0.355* | -0.942 | -0.290* | 0.874** | 1 |
表4 晋西北丘陵风沙区柠条锦鸡儿人工林叶片碳(C)、氮(N)、磷(P)含量及化学计量比之间的相关分析
Table 4 Correlation analysis of leaf carbon (C), nitrogen (N), phosphorus (P) contents and their stoichiometric ratios in the artificial Caragana korshinskii forest in the windy and sandy hilly region of northwest Shanxi
C | N | P | C:N | C:P | N:P | |
---|---|---|---|---|---|---|
C | 1 | |||||
N | 0.145 | 1 | ||||
P | 0.077 | -0.262* | 1 | |||
C:N | 0.014 | -0.913** | 0.221* | 1 | ||
C:P | 0.103 | 0.750* | -0.782* | -0.645 | 1 | |
N:P | 0.066 | 0.355* | -0.942 | -0.290* | 0.874** | 1 |
图5 晋西北丘陵风沙区土壤与植物碳(C)、氮(N)、磷(P)化学计量特征冗余分析(RDA)。 Car, 类胡萝卜素含量; Chl, 总叶绿素含量; Chl a, 叶绿素a含量; Chl b, 叶绿素b含量; LC, 叶片C含量; LCN, 叶片C:N; LCP, 叶片C:P; LN, 叶片N含量; LNP, 叶片N:P; LP, 叶片P含量; SCN, 土壤C:N; SCP, 土壤C:P; SNP, 土壤N:P; SOC, 土壤有机碳含量; STN, 土壤总氮含量; STP, 土壤总磷含量; SWC, 土壤含水量。
Fig. 5 Redundancy analysis (RDA) of soil and plant carbon (C), nitrogen (N), phosphorus (P) stoichiometric characteristics in the windy and sandy hilly region of northwest Shanxi. Car, carotenoid content; Chl, chlorophyll content; Chl a, chlorophyll a content; Chl b, chlorophyll b content; LC, leaf C content; LCN, leaf C:N; LCP, leaf C:P; LN, leaf N content; LNP, leaf N:P; LP, leaf P content; SCN, soil C:N; SCP, soil C:P; SNP, soil N:P; SOC, soil carbon content; STN, soil N content; STP, soil P content; SWC, soil water content.
地区 Region | 研究对象 Research object | C (mg·kg-1) | N (mg·kg-1) | P (mg·kg-1) | C:N | C:P | N:P | 参考文献 References |
---|---|---|---|---|---|---|---|---|
本研究区 This study area | 柠条锦鸡儿 Caragana korshinskii | 449.07 ± 1.28 (n = 50) | 23.42 ± 0.91 (n = 50) | 1.64 ± 0.07 (n = 50) | 21.28 ± 0.21 (n = 50) | 298.28 ± 13.09 (n = 50) | 16.01 ± 1.11 (n = 50) | 本研究 This study |
黄土丘陵 The loess hill | 油松 Pinus tabulaeformis | 526.18 ± 11.99 (n = 12) | 10.61 ± 0.74 (n = 12) | 0.88 ± 0.18 (n = 12) | 49.85 ± 4.31 (n = 12) | 619.16 ± 116.55 (n = 12) | 12.53 ± 2.60 (n = 12) | Jiang et al., |
阿拉善 Alxa | 植物 Plant | 397.01 ± 55.42 (n = 54) | 10.65 ± 7.91 (n = 54) | 1.04 ± 0.81 (n = 54) | 66.70 ± 60.81 (n = 54) | 683.16 ± 561.94 (n = 54) | 11.53 ± 5.06 (n = 54) | Zhang et al., |
亚热带 Subtropic | 油茶 Camellia oleifera | 503.47 ± 11.76 (n = 96) | 13.49 ± 2.65 (n = 96) | 0.77 ± 0.18 (n = 96) | 39.33 ± 7.93 (n = 96) | 701.86 ± 172.92 (n = 96) | 18.05 ± 3.92 (n = 96) | Deng et al., |
中国 China | 植物 Plant | - | 20.20 ± 8.40 (n = 554) | 1.46 ± 0.99 (n = 754) | - | - | 16.30 ± 9.32 (n = 547) | Han et al., |
全球 World | 植物 Plant | 464.00 ± 32.10 (n = 492) | 20.60 ± 12.20 (n = 492) | 1.99 ± 1.49 (n = 492) | 22.50 ± 10.60 (n = 492) | 232.00 ± 145.00 (n = 492) | 12.70 ± 6.82 (n = 492) | Elser et al., |
表5 晋西北丘陵风沙区植物叶片碳(C)、氮(N)、磷(P)含量及化学计量特征与其他区域的比较(平均值±标准误)
Table 5 Comparisons of leaf carbon (C), nitrogen (N), phosphorus (P) contents and stoichiometric characteristics in the windy and sandy hilly region of northwest Shanxi with findings in other studies (mean ± SE)
地区 Region | 研究对象 Research object | C (mg·kg-1) | N (mg·kg-1) | P (mg·kg-1) | C:N | C:P | N:P | 参考文献 References |
---|---|---|---|---|---|---|---|---|
本研究区 This study area | 柠条锦鸡儿 Caragana korshinskii | 449.07 ± 1.28 (n = 50) | 23.42 ± 0.91 (n = 50) | 1.64 ± 0.07 (n = 50) | 21.28 ± 0.21 (n = 50) | 298.28 ± 13.09 (n = 50) | 16.01 ± 1.11 (n = 50) | 本研究 This study |
黄土丘陵 The loess hill | 油松 Pinus tabulaeformis | 526.18 ± 11.99 (n = 12) | 10.61 ± 0.74 (n = 12) | 0.88 ± 0.18 (n = 12) | 49.85 ± 4.31 (n = 12) | 619.16 ± 116.55 (n = 12) | 12.53 ± 2.60 (n = 12) | Jiang et al., |
阿拉善 Alxa | 植物 Plant | 397.01 ± 55.42 (n = 54) | 10.65 ± 7.91 (n = 54) | 1.04 ± 0.81 (n = 54) | 66.70 ± 60.81 (n = 54) | 683.16 ± 561.94 (n = 54) | 11.53 ± 5.06 (n = 54) | Zhang et al., |
亚热带 Subtropic | 油茶 Camellia oleifera | 503.47 ± 11.76 (n = 96) | 13.49 ± 2.65 (n = 96) | 0.77 ± 0.18 (n = 96) | 39.33 ± 7.93 (n = 96) | 701.86 ± 172.92 (n = 96) | 18.05 ± 3.92 (n = 96) | Deng et al., |
中国 China | 植物 Plant | - | 20.20 ± 8.40 (n = 554) | 1.46 ± 0.99 (n = 754) | - | - | 16.30 ± 9.32 (n = 547) | Han et al., |
全球 World | 植物 Plant | 464.00 ± 32.10 (n = 492) | 20.60 ± 12.20 (n = 492) | 1.99 ± 1.49 (n = 492) | 22.50 ± 10.60 (n = 492) | 232.00 ± 145.00 (n = 492) | 12.70 ± 6.82 (n = 492) | Elser et al., |
地区 Region | 研究对象 Research object | 含水量 Water content (%) | C (mg·kg-1) | N (mg·kg-1) | P (mg·kg-1) | C:N | C:P | N:P | 参考文献 Reference |
---|---|---|---|---|---|---|---|---|---|
本研究区 This study area | 柠条锦鸡儿 Caragana korshinskii | 11.75 ± 0.25 (n = 50) | 3.07 ± 0.09 (n = 50) | 0.48 ± 0.02 (n = 50) | 0.62 ± 0.01 (n = 50) | 10.27 ± 1.78 (n = 50) | 7.55 ± 0.89 (n = 50) | 1.16 ± 0.15 (n = 50) | 本研究 This study |
黄土丘陵 The loess hill | 油松 Pinus tabulaeformis | - | 35.65 ± 9.34 (n = 12) | 1.67 ± 0.25 (n = 12) | 0.57 ± 0.30 (n = 12) | 21.35 ± 7.26 (n = 12) | 62.54 ± 6.65 (n = 12) | 2.92 ± 0.41 (n = 12) | Jiang et al., |
亚热带 Subtropic | 油茶 Camellia oleifera | - | 17.37 ± 4.08 (n = 96) | 1.52 ± 0.41 (n = 96) | 0.36 ± 0.17 (n = 96) | 11.23 ± 1.65 (n = 96) | 57.20 ± 25.09 (n = 96) | 5.00 ± 2.02 (n = 96) | Zhang et al., |
全球 World | 植物 Plant | - | - | - | 2.81 ± 0.71 (n = 492) | 66.20 ± 6.30 (n = 492) | 314.12 ± 34.19 (n = 492) | 45.50 ± 3.21 (n = 492) | Elser et al., |
表6 晋西北丘陵风沙区土壤碳(C)、氮(N)、磷(P)含量及化学计量特征与其他区域的比较(平均值±标准误)
Table 6 Comparisons of soil carbon (C), nitrogen (N), phosphorus (P) contents and stoichiometric characteristics in the windy and sandy hilly region of northwest Shanxi with findings in other studies (mean ± SE)
地区 Region | 研究对象 Research object | 含水量 Water content (%) | C (mg·kg-1) | N (mg·kg-1) | P (mg·kg-1) | C:N | C:P | N:P | 参考文献 Reference |
---|---|---|---|---|---|---|---|---|---|
本研究区 This study area | 柠条锦鸡儿 Caragana korshinskii | 11.75 ± 0.25 (n = 50) | 3.07 ± 0.09 (n = 50) | 0.48 ± 0.02 (n = 50) | 0.62 ± 0.01 (n = 50) | 10.27 ± 1.78 (n = 50) | 7.55 ± 0.89 (n = 50) | 1.16 ± 0.15 (n = 50) | 本研究 This study |
黄土丘陵 The loess hill | 油松 Pinus tabulaeformis | - | 35.65 ± 9.34 (n = 12) | 1.67 ± 0.25 (n = 12) | 0.57 ± 0.30 (n = 12) | 21.35 ± 7.26 (n = 12) | 62.54 ± 6.65 (n = 12) | 2.92 ± 0.41 (n = 12) | Jiang et al., |
亚热带 Subtropic | 油茶 Camellia oleifera | - | 17.37 ± 4.08 (n = 96) | 1.52 ± 0.41 (n = 96) | 0.36 ± 0.17 (n = 96) | 11.23 ± 1.65 (n = 96) | 57.20 ± 25.09 (n = 96) | 5.00 ± 2.02 (n = 96) | Zhang et al., |
全球 World | 植物 Plant | - | - | - | 2.81 ± 0.71 (n = 492) | 66.20 ± 6.30 (n = 492) | 314.12 ± 34.19 (n = 492) | 45.50 ± 3.21 (n = 492) | Elser et al., |
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