三江平原沼泽植物叶片养分再吸收对灌木扩张的响应

doi:10.13287/j.1001-9332.202504.002

应用生态学报 ›› 2025, Vol. 36 ›› Issue (4): 1062-1070.doi: 10.13287/j.1001-9332.202504.002

三江平原沼泽植物叶片养分再吸收对灌木扩张的响应

杨静¹, 薛璟¹, 尹紫良¹, 冯伟辉¹, 赵琬婧², 张立^2,3, 王清波^2,3, 孙晓新^1,3*

¹东北林业大学林学院, 森林生态系统可持续经营教育部重点实验室, 哈尔滨 150040;
²黑龙江三江国家级自然保护区管理局, 黑龙江抚远 156500;
³黑龙江三江平原湿地生态系统定位观测研究站, 黑龙江抚远 156500

收稿日期:2024-12-23 接受日期:2025-02-03 出版日期:2025-04-18 发布日期:2025-10-18
通讯作者: *E-mail: sunxiaoxin@nefu.edu.cn
作者简介:杨静, 女, 1999年生, 硕士研究生。主要从事湿地生态学研究。E-mail: yangjing_july@163.com
基金资助:
国家自然科学基金项目(32371614)、黑龙江省自然科学基金联合引导项目(LH2024C038)和东北林业大学碳中和专项基金项目

Responses of leaf nutrient resorption in marsh plants to shrub encroachment in Sanjiang Plain, China

YANG Jing¹, XUE Jing¹, YIN Ziliang¹, FENG Weihui¹, ZHAO Wanjing², ZHANG Li^2,3, WANG Qingbo^2,3, SUN Xiaoxin^1,3*

¹Key Laboratory of Sustainable Forest Ecosystem Management of Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China;
²Heilongjiang Sanjiang National Nature Reserve Administration, Fuyuan 156500, Heilongjiang, China;
³Heilongjiang Sanjiang Plain Wetland Ecosystem Observation and Research Station, Fuyuan 156500, Heilongjiang, China

Received:2024-12-23 Accepted:2025-02-03 Online:2025-04-18 Published:2025-10-18

摘要/Abstract

摘要： 本文基于三江平原草本沼泽中灌木绣线菊的盖度(0～100%),采用野外调查与室内分析相结合的方法,以沼泽中优势植物大叶章、瘤囊薹草和绣线菊为研究对象,研究在4种灌木扩张程度(无灌木扩张;灌木轻度扩张:0～30%;灌木中度扩张:30%～70%;灌木重度扩张:>70%)下3种植物的成熟叶片和衰老叶片氮(N)、磷(P)、钾(K)含量及养分再吸收效率。结果表明: 灌木扩张对沼泽植物成熟叶片的N、P、K含量影响不显著,但显著降低了大叶章和绣线菊衰老叶片的K含量以及瘤囊薹草衰老叶片的N含量,降幅分别为40.1%、60.6%和25.3%。沼泽植物养分再吸收效率对灌木扩张的响应存在显著差异。灌木扩张后,大叶章的N、P、K再吸收效率(NRE、PRE、KRE)分别显著提高了14.6%、9.5%、3.2%;瘤囊薹草的NRE显著提高了12.6%,但KRE显著降低;绣线菊仅KRE显著提高了14.8%,NRE和PRE则无显著变化。瘤囊薹草在灌木重度扩张沼泽样地中消失,而大叶章仍然存在。冗余分析表明,植物叶片的N、P、K养分含量及其N∶P∶K化学计量比是影响养分再吸收效率变化的主要因素。灌木扩张后,大叶章和瘤囊薹草通过调整叶片养分再吸收来应对环境胁迫。大叶章凭借灵活的养分权衡能力更能适应营养贫乏的环境,与扩张的灌木绣线菊形成互补的养分利用策略。

关键词: 灌木扩张, 养分再吸收, 沼泽植物, 养分利用策略

Abstract: Based on the coverage of the shrub Spiraea salicifolia (0-100%) in the Sanjiang Plain, we examined the responses of nitrogen (N), phosphorus (P), and potassium (K) content, as well as nutrient resorption efficiency in the mature and senescent leaves of three dominant marsh plants (Deyeuxia purpurea, Carex schmidtii, and S. salicifolia) to four degrees of shrub encroachment: no shrub encroachment, light shrub encroachment (0-30%), moderate shrub encroachment (30%-70%), and heavy shrub encroachment (>70%). The results showed that shrub encroachment did not significantly affect N, P, and K contents in the mature leaves of the marsh plants. It significantly reduced K content in the senescent leaves of D. purpurea and S. salicifolia by 40.1% and 60.6%, respectively, and the N content in the senescent leaves of C. schmidtii by 25.3%. Nutrient resorption efficiency of marsh plants responded differently to shrub encroachment. After shrub encroachment, N, P, and K resorption efficiencies (NRE, PRE, KRE) of D. purpurea were significantly increased by 14.6%, 9.5%, and 3.2%, respectively. The NRE of C. schmidtii increased significantly by 12.6%, but KRE decreased significantly. For S. salicifolia, KRE increased significantly by 14.8%, while there were no significant changes in the NRE and PRE. C. schmidtii disappeared under the heavy shrub encroachment plots, whereas D. purpurea persisted. Redundancy analysis indicated that N, P, and K contents and N:P:K stoichiometric ratio of leaves were the main factors influencing nutrient resorption efficiency. Both D. purpurea and C. schmidtii adapted to shrub encroachment by adjusting leaf nutrient resorption. With the flexible nutrient allocation strategy, D. purpurea was better suited to nutrient-poor environment, forming a complementary nutrient utilization strategy with the encroachment of S. salicifolia.

Key words: shrub encroachment, nutrient resorption, marsh plant, nutrient utilization strategy

杨静, 薛璟, 尹紫良, 冯伟辉, 赵琬婧, 张立, 王清波, 孙晓新. 三江平原沼泽植物叶片养分再吸收对灌木扩张的响应[J]. 应用生态学报, 2025, 36(4): 1062-1070.

YANG Jing, XUE Jing, YIN Ziliang, FENG Weihui, ZHAO Wanjing, ZHANG Li, WANG Qingbo, SUN Xiaoxin. Responses of leaf nutrient resorption in marsh plants to shrub encroachment in Sanjiang Plain, China[J]. Chinese Journal of Applied Ecology, 2025, 36(4): 1062-1070.

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三江平原沼泽植物叶片养分再吸收对灌木扩张的响应

Responses of leaf nutrient resorption in marsh plants to shrub encroachment in Sanjiang Plain, China

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