旱化对浙江山地沼泽湿地土壤与植物碳氮磷含量的影响

doi:10.13287/j.1001-9332.202205.029

应用生态学报 ›› 2022, Vol. 33 ›› Issue (5): 1267-1274.doi: 10.13287/j.1001-9332.202205.029

旱化对浙江山地沼泽湿地土壤与植物碳氮磷含量的影响

杨乐^1,2, 何莹³, 李东宾⁴, 岳春雷¹, 朱弘¹, 张飞英¹, 李贺鹏^1*

¹浙江省林业科学研究院, 杭州 310023;
²浙江水利水电学院水利与环境工程学院, 杭州 310018;
³安吉县自然资源保护中心, 浙江湖州 313300;
⁴宁波市林场, 浙江宁波 315440

收稿日期:2021-05-22 接受日期:2021-12-30 出版日期:2022-05-15 发布日期:2022-11-15
通讯作者: * E-mail: 8656141@qq.com
作者简介:杨乐, 男, 1985年生, 助理研究员。主要从事湿地生态系统碳氮循环研究。E-mail: yangle3012@163.com
基金资助:
浙江省省属科研院所扶持专项(2020F1065-4,2021F1065-6)和浙江省公益技术应用研究项目(LGF22C030001)资助。

Effects of aridity on carbon, nitrogen, and phosphorus contents in soils and plants of mountain swamps, Zhejiang, China

YANG Le^1,2, HE Ying³, LI Dong-bin⁴, YUE Chun-lei¹, ZHU Hong¹, ZHANG Fei-ying¹, LI He-peng^1*

¹Zhejiang Academy of Forestry, Hangzhou 310023, China;
²College of Water Conservation and Environmental Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China;
³Anji Natural Resource Protection Center, Huzhou 313300, Zhejiang, China;
⁴Ningbo Forest Farm, Ningbo 315440, Zhejiang, China

Received:2021-05-22 Accepted:2021-12-30 Online:2022-05-15 Published:2022-11-15

摘要/Abstract

摘要： 因受到气候变暖、人为干扰等因素的影响,浙江省山地沼泽湿地面临着缺水旱化的问题,泥炭藓沼泽、草本沼泽逐渐退化成旱化的沼泽。在山地沼泽旱化的过程中,山地沼泽湿地土壤碳、氮、磷含量及其生态化学计量比的变化趋势尚不明确。本研究选取浙江5块不同旱化程度的山地沼泽湿地,分析土壤表层0~60 cm剖面上土壤有机碳(SOC)、全氮(TN)、全磷(TP)、土壤pH值、土壤容重等,以及植物样方地上生物量、植物粉碎混合样的有机碳(OC)、TN、TP。结果表明: 浙江山区沼泽湿地SOC、TN含量丰富,但TP含量低;随着山区沼泽湿地的旱化,容重、pH值、地上生物量上升,而SOC、TN、TP、C∶N、C∶P、N∶P呈下降趋势,容重、pH值与SOC、TN、TP均呈显著线性负相关;不同旱化程度的浙江山区沼泽湿地土壤C、N、P等元素的累积量与植物凋落物输入量、湿地氧气条件、凋落物分解的难易程度等因素有关。浙江山地沼泽湿地旱化趋势明显,土壤C、N、P等营养元素的含量下降,而植物由湿生群落向中性群落演替,植物中C、N、P含量随着植物种类的变化而变化,与土壤C、N、P含量的变化关系不耦合。

关键词: 泥炭藓沼泽, 草甸沼泽, 生态化学计量比, 旱化

Abstract: Mountain swamps in Zhejiang Province have been suffered from severe drouhgt threats because of climate change and artificial interruption. Sphagnum bogs and swamps were gradually degraded into arid swamps. However, the effects of arid processes on the C, N, P contents of soils and their stoichiometry in mountain swamps are still unclear. We measured C, N and P concentrations, pH values, and bulk density in the upper 0-60 cm soil layers in the stands of five mountain swamps with the different arid levels. Moreover, the aboveground biomass and the C, N, P concentrations in the crushed plant mixture were also measured. The results showed that the soils of mountain swamps in Zhejiang Province were rich in soil organic carbon (SOC), total nitrogen (TN), but infertile in phosphorus (TP). Aboveground biomass, soil pH, bulk density increased, while SOC, TN, TP, C:N, C:P, N:P decreased with aridity. Soil pH and bulk density had significant negative correlations with SOC, TN, and TP in soils, respectively. The differences in the C, N, P accumulation in the soils were probably associated with litterfall production, the oxygen condition of wetlands, and the degree of plant decomposition at the different types of mountain swamps. In all, arid trends were obvious at the mountain swamps in Zhejiang Province. Soil nutrients, such as C, N, P, deceased, while plant community succeeded from the wet swamp to the mesophyte vegetation with the arid processes. The contents of C, N and P in the plants varied across species, and were not coupled with those in the soils.

Key words: Sphagnum bog, swamp, stoichiometric ratio, aridity

杨乐, 何莹, 李东宾, 岳春雷, 朱弘, 张飞英, 李贺鹏. 旱化对浙江山地沼泽湿地土壤与植物碳氮磷含量的影响[J]. 应用生态学报, 2022, 33(5): 1267-1274.

YANG Le, HE Ying, LI Dong-bin, YUE Chun-lei, ZHU Hong, ZHANG Fei-ying, LI He-peng. Effects of aridity on carbon, nitrogen, and phosphorus contents in soils and plants of mountain swamps, Zhejiang, China[J]. Chinese Journal of Applied Ecology, 2022, 33(5): 1267-1274.

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旱化对浙江山地沼泽湿地土壤与植物碳氮磷含量的影响

Effects of aridity on carbon, nitrogen, and phosphorus contents in soils and plants of mountain swamps, Zhejiang, China

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