阿拉善荒漠区6种主要灌木植物叶片C:N:P化学计量比的季节变化

doi:10.3724/SP.J.1258.2013.00031

植物生态学报 ›› 2013, Vol. 37 ›› Issue (4): 317-325.DOI: 10.3724/SP.J.1258.2013.00031

所属专题：生态化学计量

阿拉善荒漠区6种主要灌木植物叶片C:N:P化学计量比的季节变化

牛得草¹, 李茜¹, 江世高¹, 常佩静², 傅华¹^,^*()

¹草地农业生态系统国家重点实验室, 兰州大学草地农业科技学院, 兰州 730020
²内蒙古阿拉善盟气象局, 内蒙古巴彦浩特 750306

收稿日期:2012-09-04 接受日期:2013-03-05 出版日期:2013-09-04 发布日期:2013-04-09
通讯作者: 傅华
作者简介:*(E-mail:fuhua@lzu.edu.cn)
基金资助:
中国科学院战略性先导科技专项-应对气候变化的碳收支认证及相关问题(XDA05050406-8);国家科技基础性工作专项(2012FY111900);国家自然科学基金(31070412);兰州大学中央高校基本科研业务费专项资金(lzujbky-2012-98);高等学校博士学科点专项科研基金(20120211110029)

Seasonal variations of leaf C:N:P stoichiometry of six shrubs in desert of China’s Alxa Plateau

NIU De-Cao¹, LI Qian¹, JIANG Shi-Gao¹, CHANG Pei-Jing², FU Hua¹^,^*()

¹State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
²Alxa League Meteorological Bureau of Inner Mongolia, Bayan Hot, Inner Mongolia 750306, China

Received:2012-09-04 Accepted:2013-03-05 Online:2013-09-04 Published:2013-04-09
Contact: FU Hua

摘要/Abstract

摘要：

为了解同一生活型不同种植物叶片碳(C)、氮(N)、磷(P)生态化学计量学特征随季节变化的响应规律, 在生长季不同月份, 对阿拉善荒漠区6种主要灌木植物霸王(Zygophyllum xanthoxylum)、白刺(Nitraria tangutorum)、红砂(Reaumuria soongorica)、驼绒藜(Ceratoides latens)、猫头刺(Oxytropis aciphylla)、沙冬青(Ammopiptanthus mongolicus)的物候期进行了连续的观察, 并采集植物叶片, 分析了其C、N、P含量及计量比在不同月份的变化。结果显示: 1)同一生活型的6种植物的叶片C、N、P及C:N、C:P和N:P在整个生长季内的变化规律不同, 且以上各指标季节间的变异系数在6种植物之间也存在差异; 2)单个植物种叶片C、N、P含量及其计量比的季节变异分析显示, 叶片C、N含量及C:N的季节变异较小, 叶片P含量及C:P和N:P的季节变异较大, 6种植物叶片C、N含量及C:N由于季节变异所计算的变异系数变化范围分别为0.60%-10.20%、6.09%-20.50%和5.87%-18.78%, 6种植物叶片P含量的季节变异所产生的变异系数范围为16.43%-43.43%, 叶片C:P和N:P的变异系数范围分别为8.48%-31.95%和11.86%-40.73%; 3)综合分析6种植物叶片C、N、P及其计量比各指标在整个生长季节内的变异, 变异系数由大到小排序为: P (28.85%) > C:P (25.02%) > N:P (22.18%) > N (14.22%) > C:N (12.48%) > C (4.62%); 4) 生长季节与植物种类对植物叶片C、N、P及其计量比影响的交叉分析显示, 植物叶片C、N含量的变异主要受植物种类影响, 植物叶片P含量的变异主要受生长季节影响, 植物叶片C:N、C:P和N:P的变异都主要受植物种类影响。

关键词: 荒漠, 生态化学计量学, 生活型, 灌木

Abstract:

Aims Our objective was to explore seasonal variations of leaf C:N:P stoichiometry in plants with the same growth form.
Methods We chose six shrubs in the desert of the Alxa Plateau in north-central China (Zygophyllum xanthoxylum, Nitraria tangutorum, Reaumuria soongorica, Ceratoides lateens, Oxytropis aciphylla and Ammopiptanthus mongolicus) and observed their phenological stages from May to October 2010. Leaf samples were collected during this period, and leaf C, N and P contents and C:N:P stoichiometry were monitored.
Important findings Seasonal dynamics of leaf C, N and P contents and C:N, C:P and N:P mass ratio in the six shrubs were species-specifics, and the variation of leaf C, N and P and C:N, C:P and N:P mass ratios in different species were also dramatically different. Based on variation analysis among different seasons within species, there were less seasonal dynamics in C and N contents and C:N mass ratio than the other three parameters including P contents and C:P and N:P mass ratios. The range of values of coefficient of variation (CV) for C and N contents and N:P mass ratio was 0.60%-10.20%, 6.09%-20.50% and 5.87%-18.78%, respectively. For the other three parameters, the range of CV values for P content was 16.43%-43.43%, and C:P and N:P mass ratios were 8.48%-31.95% and 11.86%-40.73%, respectively. With the comprehensive analysis based on the total variation (resulting from two factors: season and species) for each parameter in these six shrubs, the rank of CV for each parameter was P (28.85%) > C:P (25.02%) > N:P (22.18%) > N (14.22%) > C:N (12.48%) > C (4.62%). Factorial analysis of variation for each parameter, with sampling date (season) and species as independent variables, showed that leaf C and N contents and leaf C:N, C:P and N:P mass ratios were mainly determined by plant species. For leaf P contents, it was the sampling date (season).

Key words: desert, ecological stoichiometry, life form, shrub

牛得草, 李茜, 江世高, 常佩静, 傅华. 阿拉善荒漠区6种主要灌木植物叶片C:N:P化学计量比的季节变化. 植物生态学报, 2013, 37(4): 317-325. DOI: 10.3724/SP.J.1258.2013.00031

NIU De-Cao, LI Qian, JIANG Shi-Gao, CHANG Pei-Jing, FU Hua. Seasonal variations of leaf C:N:P stoichiometry of six shrubs in desert of China’s Alxa Plateau. Chinese Journal of Plant Ecology, 2013, 37(4): 317-325. DOI: 10.3724/SP.J.1258.2013.00031

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https://www.plant-ecology.com/CN/Y2013/V37/I4/317

图/表 4

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物种 Species	5月 May	6月 Jun.	7月 Jul.	8月 Aug.	9月 Sept.	10月 Oct.
霸王 Zygophyllum xanthoxylon	D	F	A	A	A	H
白刺 Nitraria tangutorum	A	F	G	A	A	H
红砂 Reaumuria soongorica	A	A	A	C	D	F
驼绒藜 Ceratoides latens	A	A	A	A	A	F
猫头刺 Oxytropis aciphylla	C	F	A	A	A	H
沙冬青 Ammopiptanthus mongolicus	F	F	A	A	A	A

物种 Species	5月 May	6月 Jun.	7月 Jul.	8月 Aug.	9月 Sept.	10月 Oct.
霸王 Zygophyllum xanthoxylon	D	F	A	A	A	H
白刺 Nitraria tangutorum	A	F	G	A	A	H
红砂 Reaumuria soongorica	A	A	A	C	D	F
驼绒藜 Ceratoides latens	A	A	A	A	A	F
猫头刺 Oxytropis aciphylla	C	F	A	A	A	H
沙冬青 Ammopiptanthus mongolicus	F	F	A	A	A	A

参数 Parameter	物种 Species	平均值 Mean	极差 Range	最小值 Minimum	最大值 Maximum	变异系数 Coefficient of variation (%)
C (mg·g^-1)	霸王 Zygophyllum xanthoxylon	322.87	88.03	281.53	369.56	10.20
	白刺 Nitraria tangutorum	375.24	34.49	365.71	400.20	3.40
	红砂 Reaumuria soongorica	342.43	93.32	301.73	395.04	9.97
	驼绒藜 Ceratoides latens	377.03	14.53	368.49	383.01	1.45
	猫头刺 Oxytropis aciphylla	417.81	24.25	408.04	432.29	2.07
	沙冬青 Ammopiptanthus mongolicus	470.59	7.29	467.63	474.92	0.60
N (mg·g^-1)	霸王 Zygophyllum xanthoxylon	27.02	12.44	21.19	33.64	20.50
	白刺 Nitraria tangutorum	41.53	18.56	35.67	54.23	16.36
	红砂 Reaumuria soongorica	33.60	14.76	25.66	40.42	14.68
	驼绒藜 Ceratoides latens	38.91	11.24	34.51	45.75	11.47
	猫头刺 Oxytropis aciphylla	28.72	11.43	23.22	34.65	16.19
	沙冬青 Ammopiptanthus mongolicus	31.01	4.36	28.28	32.64	6.09
P (mg·g^-1)	霸王 Zygophyllum xanthoxylon	1.73	1.29	1.16	2.45	28.20
	白刺 Nitraria tangutorum	2.02	2.33	1.37	3.70	42.71
	红砂 Reaumuria soongorica	1.35	1.64	0.84	2.47	43.43
	驼绒藜 Ceratoides latens	1.94	1.49	1.26	2.75	24.78
	猫头刺 Oxytropis aciphylla	2.10	0.91	1.46	2.37	16.43
	沙冬青 Ammopiptanthus mongolicus	1.21	0.61	0.99	1.60	17.56
C:N	霸王 Zygophyllum xanthoxylon	12.38	4.02	10.29	14.31	11.94
	白刺 Nitraria tangutorum	9.20	2.88	7.39	10.27	11.55
	红砂 Reaumuria soongorica	10.41	5.15	8.76	13.91	18.78
	驼绒藜 Ceratoides latens	9.85	2.99	8.12	11.12	11.92
	猫头刺 Oxytropis aciphylla	14.89	5.59	12.21	17.81	14.81
	沙冬青 Ammopiptanthus mongolicus	15.26	2.08	14.48	16.56	5.87
C:P	霸王 Zygophyllum xanthoxylon	234.59	187.76	151.95	339.71	31.95
	白刺 Nitraria tangutorum	229.79	174.74	125.48	300.22	28.71
	红砂 Reaumuria soongorica	305.21	264.85	182.00	446.86	30.28
	驼绒藜 Ceratoides latens	218.22	171.42	149.09	320.52	26.30
	猫头刺 Oxytropis aciphylla	235.61	155.38	186.96	342.33	24.45
	沙冬青 Ammopiptanthus mongolicus	429.07	92.05	388.88	480.94	8.48
N:P	霸王 Zygophyllum xanthoxylon	19.56	22.09	12.32	34.42	40.73
	白刺 Nitraria tangutorum	24.59	15.69	17.06	32.74	22.44
	红砂 Reaumuria soongorica	29.18	16.60	18.46	35.06	19.52
	驼绒藜 Ceratoides latens	22.12	14.04	14.82	28.87	21.63
	猫头刺 Oxytropis aciphylla	15.77	7.69	12.17	19.86	16.90
	沙冬青 Ammopiptanthus mongolicus	28.18	8.93	23.70	32.64	11.86

参数 Parameter	物种 Species	平均值 Mean	极差 Range	最小值 Minimum	最大值 Maximum	变异系数 Coefficient of variation (%)
C (mg·g^-1)	霸王 Zygophyllum xanthoxylon	322.87	88.03	281.53	369.56	10.20
	白刺 Nitraria tangutorum	375.24	34.49	365.71	400.20	3.40
	红砂 Reaumuria soongorica	342.43	93.32	301.73	395.04	9.97
	驼绒藜 Ceratoides latens	377.03	14.53	368.49	383.01	1.45
	猫头刺 Oxytropis aciphylla	417.81	24.25	408.04	432.29	2.07
	沙冬青 Ammopiptanthus mongolicus	470.59	7.29	467.63	474.92	0.60
N (mg·g^-1)	霸王 Zygophyllum xanthoxylon	27.02	12.44	21.19	33.64	20.50
	白刺 Nitraria tangutorum	41.53	18.56	35.67	54.23	16.36
	红砂 Reaumuria soongorica	33.60	14.76	25.66	40.42	14.68
	驼绒藜 Ceratoides latens	38.91	11.24	34.51	45.75	11.47
	猫头刺 Oxytropis aciphylla	28.72	11.43	23.22	34.65	16.19
	沙冬青 Ammopiptanthus mongolicus	31.01	4.36	28.28	32.64	6.09
P (mg·g^-1)	霸王 Zygophyllum xanthoxylon	1.73	1.29	1.16	2.45	28.20
	白刺 Nitraria tangutorum	2.02	2.33	1.37	3.70	42.71
	红砂 Reaumuria soongorica	1.35	1.64	0.84	2.47	43.43
	驼绒藜 Ceratoides latens	1.94	1.49	1.26	2.75	24.78
	猫头刺 Oxytropis aciphylla	2.10	0.91	1.46	2.37	16.43
	沙冬青 Ammopiptanthus mongolicus	1.21	0.61	0.99	1.60	17.56
C:N	霸王 Zygophyllum xanthoxylon	12.38	4.02	10.29	14.31	11.94
	白刺 Nitraria tangutorum	9.20	2.88	7.39	10.27	11.55
	红砂 Reaumuria soongorica	10.41	5.15	8.76	13.91	18.78
	驼绒藜 Ceratoides latens	9.85	2.99	8.12	11.12	11.92
	猫头刺 Oxytropis aciphylla	14.89	5.59	12.21	17.81	14.81
	沙冬青 Ammopiptanthus mongolicus	15.26	2.08	14.48	16.56	5.87
C:P	霸王 Zygophyllum xanthoxylon	234.59	187.76	151.95	339.71	31.95
	白刺 Nitraria tangutorum	229.79	174.74	125.48	300.22	28.71
	红砂 Reaumuria soongorica	305.21	264.85	182.00	446.86	30.28
	驼绒藜 Ceratoides latens	218.22	171.42	149.09	320.52	26.30
	猫头刺 Oxytropis aciphylla	235.61	155.38	186.96	342.33	24.45
	沙冬青 Ammopiptanthus mongolicus	429.07	92.05	388.88	480.94	8.48
N:P	霸王 Zygophyllum xanthoxylon	19.56	22.09	12.32	34.42	40.73
	白刺 Nitraria tangutorum	24.59	15.69	17.06	32.74	22.44
	红砂 Reaumuria soongorica	29.18	16.60	18.46	35.06	19.52
	驼绒藜 Ceratoides latens	22.12	14.04	14.82	28.87	21.63
	猫头刺 Oxytropis aciphylla	15.77	7.69	12.17	19.86	16.90
	沙冬青 Ammopiptanthus mongolicus	28.18	8.93	23.70	32.64	11.86

参数 Parameter	变异来源 Source of variation	df	离差平方和 SS	均方 MS	F
C (mg·g^-1)	物种 Species (S)	5	597 711.49	119 542.30	148.64^*
	物种间误差 S-error	36	28 953.23	804.26
	月份 Month (M)	5 (1)	34 439.91	6 887.98	29.92^*
	物种×月份 S × M	25 (5)	53 994.40	2 159.78	9.38^*
	月份间误差 M-error	180 (36)	41 444.84	230.25
N (mg·g^-1)	物种 Species (S)	5	6 916.68	1 383.34	75.89^*
	物种间误差 S-error	36	656.19	18.23
	月份 Month (M)	5 (1)	1 443.42	288.68	36.61^*
	物种×月份 S × M	25 (5)	3 676.34	147.05	18.65^*
	月份间误差 M-error	180 (36)	1 419.24	7.88
P (mg·g^-1)	物种 Species (S)	5	28.51	5.70	11.97^*
	物种间误差 S-error	36	17.14	0.48
	月份 Month (M)	5 (1)	39.07	7.81	12.16^*
	物种×月份 S × M	25 (5)	21.12	0.84	1.32
	月份间误差 M-error	180 (36)	115.64	0.64
C:N	物种 Species (S)	5	1 435.30	287.06	173.29^*
	物种间误差 S-error	36	59.64	1.66
	月份 Month (M)	5 (1)	68.78	13.76	21.33^*
	物种×月份 S × M	25 (5)	427.37	17.09	26.51^*
	月份间误差 M-error	180 (36)	116.07	0.64
C:P	物种 Species (S)	5	1402 340.42	280 468.08	41.53^*
	物种间误差 S-error	36	243 097.02	6 752.69
	月份 Month (M)	5 (1)	345 548.68	69 109.74	9.12^*
	物种×月份 S × M	25 (5)	564 090.30	22 563.61	2.98^*
	月份间误差 M-error	180 (36)	1 363 342.92	7 574.13
N:P	物种 Species (S)	5	5 524.04	1 104.81	23.28^*
	物种间误差 S-error	36	1 708.24	47.45
	月份 Month (M)	5 (1)	2 445.29	489.06	9.80^*
	物种×月份 S × M	25 (5)	3 334.12	133.36	2.67^*
	月份间误差 M-error	180 (36)	8 978.80	49.88

阿拉善荒漠区6种主要灌木植物叶片C:N:P化学计量比的季节变化

Seasonal variations of leaf C:N:P stoichiometry of six shrubs in desert of China’s Alxa Plateau

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