中国植物细根碳、氮、磷化学计量学的空间变化及其影响因子

doi:10.17521/cjpe.2015.0015

植物生态学报 ›› 2015, Vol. 39 ›› Issue (2): 159-166.DOI: 10.17521/cjpe.2015.0015

所属专题：生态化学计量

中国植物细根碳、氮、磷化学计量学的空间变化及其影响因子

马玉珠^1,², 钟全林^1,², 靳冰洁^1,², 卢宏典^1,², 郭炳桥^1,², 郑媛^1,², 李曼^1,², 程栋梁^1,^2,^*()

¹福建师范大学地理研究所, 福州 350007
²福建师范大学地理科学学院, 湿润亚热带山地生态国家重点实验室培育基地, 福州 350007

收稿日期:2014-09-16 接受日期:2014-12-17 出版日期:2015-02-01 发布日期:2015-03-10
通讯作者: 程栋梁
作者简介:
# 共同第一作者
基金资助:
国家自然科学基金(31170374、31170596和31370589)、福建省教育厅新世纪优秀人才支持计划(JA12055)和福建省杰出青年基金(2013J06009)

Spatial changes and influencing factors of fine root carbon, nitrogen and phosphorus stoichiometry of plants in China

MA Yu-Zhu^1,², ZHONG Quan-Lin^1,², JIN Bing-Jie^1,², LU Hong-Dian^1,², GUO Bing-Qiao^1,², ZHENG Yuan^1,², LI Man^1,², CHENG Dong-Liang^1,^2,^*()

¹Geography Institute of Fujian Normal University, Fuzhou 350007, China
²State Key Laboratory Breeding Base of Humid Subtropical Mountain Ecology, College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China

Received:2014-09-16 Accepted:2014-12-17 Online:2015-02-01 Published:2015-03-10
Contact: Dong-Liang CHENG
About author:
# Co-first authors

摘要/Abstract

摘要：

为了研究中国陆地植物细根碳(C)、氮(N)、磷(P)的空间变化模式, 揭示细根在“温度-植物生理假说”及“生长速率假说”等方面的规律, 该文收集已发表的有关中国陆地植物细根研究的文献, 从中提取细根C、N、P元素含量及其相关数据, 分析了细根C、N、P含量及其比例与经纬度之间的关系。结果表明: 细根N、P元素含量均随纬度增加而增加, P含量随经度增加而降低, N:P随经度增加而增加。细根N、P含量与年平均气温、年降水量均呈负相关关系, 与土壤养分呈正相关关系。在土壤养分、温度、降水量3个非生物因素中, 土壤养分对细根N、P含量的影响最大。该文中细根和粗根的C:P、N:P差异变化不完全支持“生长速率假说”。根系和叶片一样, N、P含量与纬度呈正相关关系, 支持“温度-植物生理假说”, 反映了植物对自然环境的适应策略。

关键词: 纬度, 经度, 土壤养分, 温度, 降水

Abstract: Aims

Fine roots and leaves are important below- and above-ground functional organs. It is widely recognized that leaf nitrogen (N) and phosphorus (P) stoichiometry displays significant latitudinal variations, and two competing theories (i.e. Temperature-Plant Physiological Hypothesis and Growth Rate Hypothesis) have been proposed to explain this phenomenon. Although considerable efforts have been made to test these theories, comparatively few data have been reported for the plants in China to examine the latitudinal and longitudinal variations in fine root carbon (C), N and P stoichiometry. Accordingly, we compiled an extensive data set of root C, N and P stoichiometry, our objective was to address three main issues: (1) whether the C, N and P stoichiometric latitudinal patterns for roots conform to those reported for leaves, (2) how exactly does root C, N and P stoichiometry changes as a function of longitude, and (3) whether the Temperature-Plant Physiological Hypothesis or Growth Rate Hypothesis can account for the latitudinal patterns observed for fine root stoichiometry.

Methods

We compiled data on fine root C, N and P contents, climate, and geographic location, and analyzed the correlations among these variables.

Important findings

The N and P contents were higher in fine roots as opposed to coarse roots. The N and P contents in fine roots increased with increasing latitude. P content in fine roots declined with increasing longitude, whereas the N:P of fine roots increased with increasing longitude. The N and P contents in fine roots were negatively correlated with mean annual temperature and mean annual precipitation, but positively correlated with soil nutrient. Among the three abiotic factors (i.e. soil N and P contents, temperature and precipitation), soil N and P levels had the greatest effect on the N and P contents in fine roots . The variations observed in fine and coarse root C:P and N:P were inconsistent with the Growth Rate Hypothesis, whereas the positive correlations between root N and P contents and latitude were the same as those observed for leaves, which support Temperature-Plant Physiological Hypothesis, reflecting an adaptive strategy to environmental conditions.

Key words: latitude, longitude, soil nutrient, temperature, precipitation

马玉珠, 钟全林, 靳冰洁, 卢宏典, 郭炳桥, 郑媛, 李曼, 程栋梁. 中国植物细根碳、氮、磷化学计量学的空间变化及其影响因子. 植物生态学报, 2015, 39(2): 159-166. DOI: 10.17521/cjpe.2015.0015

MA Yu-Zhu,ZHONG Quan-Lin,JIN Bing-Jie,LU Hong-Dian,GUO Bing-Qiao,ZHENG Yuan,LI Man,CHENG Dong-Liang. Spatial changes and influencing factors of fine root carbon, nitrogen and phosphorus stoichiometry of plants in China. Chinese Journal of Plant Ecology, 2015, 39(2): 159-166. DOI: 10.17521/cjpe.2015.0015

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图/表 5

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	因变量 Dependent variable	n	最小值 Min (%)	最大值 Max (%)	平均值 Mean (%)	标准差 Standard deviation
细根 Fine root	C	33	37.09	58.91	47.39	5.07
	N	146	0.24	2.97	0.92	0.43
	P	123	0.01	0.47	0.10	0.08
	N:P	123	1.63	63.87	14.27	9.88
	C:N	33	23.09	116.02	59.15	27.11
	C:P	17	166.08	1 118.00	522.10	289.86
粗根 Coarse root	C	59	34.80	54.49	45.65	4.42
	N	182	0.07	2.18	0.59	0.33
	P	149	0.01	0.54	0.06	0.05
	N:P	149	1.58	35.07	11.67	6.86
	C:N	55	24.27	560.00	121.98	95.50
	C:P	41	318.15	2 407.22	957.27	551.18

	因变量 Dependent variable	n	最小值 Min (%)	最大值 Max (%)	平均值 Mean (%)	标准差 Standard deviation
细根 Fine root	C	33	37.09	58.91	47.39	5.07
	N	146	0.24	2.97	0.92	0.43
	P	123	0.01	0.47	0.10	0.08
	N:P	123	1.63	63.87	14.27	9.88
	C:N	33	23.09	116.02	59.15	27.11
	C:P	17	166.08	1 118.00	522.10	289.86
粗根 Coarse root	C	59	34.80	54.49	45.65	4.42
	N	182	0.07	2.18	0.59	0.33
	P	149	0.01	0.54	0.06	0.05
	N:P	149	1.58	35.07	11.67	6.86
	C:N	55	24.27	560.00	121.98	95.50
	C:P	41	318.15	2 407.22	957.27	551.18

	因变量 Dependent variable	截距 Intercept	斜率 Slope	R²	p	n
细根 Fine root	C	1.74	-0.002	0.102	0.070	33
	N	-0.36	0.009	0.133	<0.001	146
	P	-1.54	0.013	0.097	<0.001	123
	N:P	1.21	-0.005	0.016	0.161	123
	C:N	2.20	-0.015	0.259	0.003	33
	C:P	2.95	-0.009	0.085	0.256	17
粗根 Coarse root	C	1.71	-0.002	0.099	0.015	59
	N	-0.21	-0.003	0.006	0.316	182
	P	-1.45	0.005	0.020	0.084	149
	N:P	1.37	-0.012	0.095	<0.001	149
	C:N	2.13	-0.004	0.015	0.373	55
	C:P	2.89	0.001	0.001	0.863	41
细根+粗根 Fine root + coarse root	C	1.71	-0.002	0.081	0.006	92
	N	-0.29	0.003	0.008	0.101	328
	P	-1.50	0.009	0.051	<0.001	272
	N:P	1.29	-0.008	0.047	<0.001	272
	C:N	2.26	-0.012	0.097	0.003	88
	C:P	3.04	-0.007	0.034	0.167	58

	因变量 Dependent variable	截距 Intercept	斜率 Slope	R²	p	n
细根 Fine root	C	1.74	-0.002	0.102	0.070	33
	N	-0.36	0.009	0.133	<0.001	146
	P	-1.54	0.013	0.097	<0.001	123
	N:P	1.21	-0.005	0.016	0.161	123
	C:N	2.20	-0.015	0.259	0.003	33
	C:P	2.95	-0.009	0.085	0.256	17
粗根 Coarse root	C	1.71	-0.002	0.099	0.015	59
	N	-0.21	-0.003	0.006	0.316	182
	P	-1.45	0.005	0.020	0.084	149
	N:P	1.37	-0.012	0.095	<0.001	149
	C:N	2.13	-0.004	0.015	0.373	55
	C:P	2.89	0.001	0.001	0.863	41
细根+粗根 Fine root + coarse root	C	1.71	-0.002	0.081	0.006	92
	N	-0.29	0.003	0.008	0.101	328
	P	-1.50	0.009	0.051	<0.001	272
	N:P	1.29	-0.008	0.047	<0.001	272
	C:N	2.26	-0.012	0.097	0.003	88
	C:P	3.04	-0.007	0.034	0.167	58

	因变量 Dependent variable	截距 Intercept	斜率 Slope	R²	p	n
细根 Fine root	C	1.76	-0.000 7	0.024	0.386	33
	N	-0.60	0.004 5	0.028	0.042	146
	P	0.35	-0.013 0	0.059	0.007	123
	N:P	-0.46	0.013 4	0.078	0.002	123
	C:N	2.44	-0.006 3	0.098	0.075	33
	C:P	2.15	0.004 7	0.037	0.462	17
粗根 Coarse root	C	1.81	-0.001 3	0.097	0.016	59
	N	-1.24	0.008 4	0.125	<0.001	182
	P	-1.27	-0.000 2	<0.001	0.932	149
	N:P	0.13	0.007 6	0.083	<0.001	149
	C:N	2.76	-0.006 9	0.060	0.071	55
	C:P	2.19	0.006 8	0.056	0.138	41
细根+粗根 Fine root + coarse root	C	1.78	-0.001 1	0.057	0.021	92
	N	-1.13	0.008 2	0.090	<0.001	328
	P	-0.94	-0.002 5	0.005	0.232	272
	N:P	-0.01	0.009 0	0.077	<0.001	272
	C:N	2.80	-0.008 2	0.084	0.006	88
	C:P	2.24	0.005 6	0.033	0.172	58

中国植物细根碳、氮、磷化学计量学的空间变化及其影响因子

Spatial changes and influencing factors of fine root carbon, nitrogen and phosphorus stoichiometry of plants in China

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	N			P
	斜率 Slope	R²	n	斜率 Slope	R²	n
年平均气温 MAT	-6.8E-3	0.105^***	146	-8.3E-3	0.056^**	123
年降水量 MAP	-8.4E-5	0.061^**	146	-1.6E-4	0.077^**	123
年平均气温+年降水量 MAT + MAP		0.109^***	146		0.077^**	123
土壤N Soil N	0.17	0.112^**	80
土壤P Soil P				0.36	0.154^**	65
气候+土壤N Climate + soil N		0.154^**	80
气候+土壤P Climate + soil P					0.250^**	65

	年平均气温 MAT	年降水量 MAP	土壤N Soil N	土壤P Soil P	n	R²	p
细根N Fine root N	-0.047	-0.106	0.283		80	0.154	0.005
细根P Fine root P	-0.336	0.228		0.419	65	0.250	0.001
细根N Fine root N	-0.226	0.062			146	0.109	<0.001
细根P Fine root P	-0.008	-0.147			123	0.077	0.008

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