多枝柽柳叶片结构和化学性状对土壤水分变化的响应

doi:10.13866/j.azr.2022.05.13

干旱区研究 ›› 2022, Vol. 39 ›› Issue (5): 1486-1495.doi: 10.13866/j.azr.2022.05.13

多枝柽柳叶片结构和化学性状对土壤水分变化的响应

李泽厚^1,^2,³(),李蕊希^1,^2,³,张舒斌^1,^2,³,王崇斌^1,^2,³,郑明明^1,^2,³,董叶卿^1,^2,³,吴雪^1,^2,^3,⁴()

1.新疆大学生态与环境学院,新疆乌鲁木齐 830017
2.绿洲生态教育部重点实验室,新疆乌鲁木齐 830017
3.新疆精河温带荒漠生态系统教育部野外科学观测研究站,新疆精河 833300
4.新疆大学生态学博士后科研流动站,新疆乌鲁木齐 830017

收稿日期:2022-02-27 修回日期:2022-06-11 出版日期:2022-09-15 发布日期:2022-10-25
通讯作者: 吴雪
作者简介:李泽厚（2001-）,男,主要研究方向为植物生态学. E-mail: 1534886844@qq.com
基金资助:
新疆维吾尔自治区自然科学基金(2020D01C053);国家自然科学基金(32001145);新疆维吾尔自治区教育厅“天池博士计划”(TCBS202054)

Responses of leaf structural and chemical trait of Tamarix ramosissima to soil water changes

LI Zehou^1,^2,³(),LI Ruixi^1,^2,³,ZHANG Shubin^1,^2,³,WANG Chongbin^1,^2,³,ZHENG Mingming^1,^2,³,DONG Yeqing^1,^2,³,WU Xue^1,^2,^3,⁴()

1. College of Ecology and Environment, Xinjiang University, Urumqi 830017, Xinjiang, China
2. Key Laboratory of Oasis Ecology of Education Ministry, Urumqi 830017, Xinjiang, China
3. Xinjiang Jinghe Observation and Research Station of Temperate Desert Ecosystem, Ministry of Education, Jinghe 833300, Xinjiang, China
4. Ecology Post-Doctoral Research Station, Xinjiang University, Urumqi 830017, Xinjiang, China

Received:2022-02-27 Revised:2022-06-11 Online:2022-09-15 Published:2022-10-25
Contact: Xue WU

摘要/Abstract

摘要：

荒漠植物经过与极端环境博弈,发展出了独特的叶片功能性状,是其为适应长期干旱胁迫所采取的生态对策之一。本研究在塔里木盆地北缘不同土壤水分条件下以多枝柽柳（Tamarix ramosissima）为研究对象,调查其种群特征,测定分析其叶片结构和化学性状以及主要土壤理化性质。结果表明：（1）土壤水分对柽柳叶片全氮、全磷、C:P、C:N、平均叶厚和平均叶面积等性状具有显著影响。（2）随着土壤含水量增加,柽柳叶片N:P呈现下降趋势,其生长逐渐从受磷限制转变为受氮限制。（3）柽柳叶片全磷含量与C:P、N:P之间呈极显著负相关（P<0.01）、C:N与平均叶面积呈显著正相关（P<0.05）。（4）土壤含水量是影响柽柳叶片功能性状的重要因素,柽柳通过部分叶片性状之间的协同变化以便更好地适应干旱环境。研究结果可为干旱荒漠地区生态保护和恢复过程中植物生态适应性评价提供科学依据。

关键词: 多枝柽柳, 土壤含水量, 叶片性状, 生态对策, 塔里木盆地

Abstract:

Desert plants have developed unique leaf traits as part of their ecological response to long-term drought stress. We investigated the population characteristics of Tamarix ramosissima under different soil water conditions at the northern edge of the Tarim Basin and measured and analyzed its leaf structural and chemical traits, along with the main soil physicochemical properties, in this study. that the following was found: (1) soil water had a significant effect on several leaf traits of Tamarix ramosissima, including total nitrogen and phosphorus content, C:P, C:N, mean leaf thickness, and mean leaf area. (2) With the increase of soil water content, the N:P of Tamarix ramosissima leaves decreased, and its growth gradually changed from phosphorus-limited to nitrogen-limited. (3) There was a significant negative correlation between the total phosphorus content and C:P and N:P of Tamarix ramosissima leaves (P < 0.01) and a significant positive correlation between C:N and the mean leaf area (P < 0.05). The results indicate that soil water content is an important factor affecting the leaf functional traits of Tamarix ramosissima, and it adapts to the arid environment through the synergistic changes of some leaf traits. This study provides a basis for the evaluation of plant ecological adaptations in the ecological conservation and restoration processes in arid desert areas.

Key words: Tamarix ramosissima, soil water content, leaf traits, ecological strategy, Tarim Basin

李泽厚,李蕊希,张舒斌,王崇斌,郑明明,董叶卿,吴雪. 多枝柽柳叶片结构和化学性状对土壤水分变化的响应[J]. 干旱区研究, 2022, 39(5): 1486-1495.

LI Zehou,LI Ruixi,ZHANG Shubin,WANG Chongbin,ZHENG Mingming,DONG Yeqing,WU Xue. Responses of leaf structural and chemical trait of Tamarix ramosissima to soil water changes[J]. Arid Zone Research, 2022, 39(5): 1486-1495.

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土壤含水量	株高/cm	冠幅/cm	密度/（株·hm^-2）	盖度/%
低	161.98±0.39b	202.41±1.52b	191.67±3.93	51.67±0.41c
中	132.04±0.62b	190.63±1.68b	383.33±11.37	66.67±0.36b
高	380.81±3.50a	398.47±5.91a	183.33±7.83	91.67±0.30a

土壤含水量	土壤pH	土壤电导率/（μS·cm^-1）	土壤含水量/%
低	8.24±0.04	2293±7.80a	0.55±2.03c
中	8.29±0.17	1744±8.57a	22.30±0.88b
高	8.74±0.05	420±2.30b	31.56±0.22a

指标	有机碳	全磷	全氮	C:P	C:N	N:P	平均叶厚	平均叶面积	比叶面积	叶组织密度
有机碳	1	0.05	-0.12	0.17	0.34	-0.08	-0.14	-0.49	-0.41	0.37
全磷		1	0.61	-0.94^**	-0.59	-0.87^**	-0.72^*	-0.52	0.56	0.25
全氮			1	-0.74^*	-0.97^**	-0.20	-0.77^*	-0.61	0.13	0.51
C:P				1	0.75^*	0.79^*	0.70^*	0.49	-0.49	-0.29
C:N					1	0.19	0.71	0.47^*	-0.23	-0.41
N:P						1	0.42	0.28	-0.52	-0.08
平均叶厚							1	0.63	-0.06	-0.74^*
平均叶面积								1	0.21	-0.59
比叶面积									1	-0.60
叶组织密度										1

叶片性状	第一主成分	第二主成分	第三主成分	综合得分	综合位次	公因子方差
有机碳	-0.024	0.639	0.683	0.238	3	0.874
全磷	-0.900	-0.296	0.311	-1.532	8	0.995
全氮	0.866	0.113	-0.426	-1.712	9	0.944
C:P	0.929	0.307	-0.063	0.832	1	0.962
C:N	0.827	0.041	0.544	-3.132	10	0.981
N:P	0.630	0.403	-0.597	-1.511	7	0.915
平均叶厚	0.886	-0.254	0.046	0.156	5	0.852
平均叶面积	0.688	-0.505	-0.190	-0.194	6	0.764
比叶面积	-0.282	-0.901	0.108	0.262	2	0.903
叶组织密度	-0.539	0.755	-0.061	0.216	4	0.865
特征值	5.134	2.468	1.453
贡献率/%	51.341	24.677	14.532
累计贡献率/%	51.341	76.018	90.550

多枝柽柳叶片结构和化学性状对土壤水分变化的响应

Responses of leaf structural and chemical trait of Tamarix ramosissima to soil water changes

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