[1]拓卫卫,范家伟,周雅洁,等.毛乌素沙地樟子松林植物-土壤生态化学计量特征演变关系[J].水土保持研究,2023,30(06):177-186.[doi:10.13869/j.cnki.rswc.2023.06.047]
　Tuo Weiwei,Fan Jiawei,Zhou Yajie,et al.Evolutionary Relationship of Ecological Stoichiometric Characteristics Between Soil and Plant of Pinus sylvestris Forest in Mu Us Sandy Land[J].Research of Soil and Water Conservation,2023,30(06):177-186.[doi:10.13869/j.cnki.rswc.2023.06.047]
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毛乌素沙地樟子松林植物-土壤生态化学计量特征演变关系

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 30 期数: 2023年06期 页码: 177-186 栏目: 出版日期: 2023-10-10
Title:
Evolutionary Relationship of Ecological Stoichiometric Characteristics Between Soil and Plant of Pinus sylvestris Forest in Mu Us Sandy Land
文章编号:
1005-3409(2023)06-0177-10
作者:
拓卫卫1, 范家伟1, 周雅洁2, 杨 京1, 张延文1, 佟小刚1,2, 吴发启1, 姚 冲1
(1.西北农林科技大学 水土保持研究所, 陕西 杨凌 712100; 2.农业农村部西北旱地农业绿色低碳重点实验室, 陕西 杨凌 712100)
Author(s):
Tuo Weiwei1, Fan Jiawei1, Zhou Yajie2, Yang Jing1, Zhang Yanwen1, Tong Xiaogang1,2, Wu faqi1, Yao Chong1
(1.Institute of soil and water conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Key Laboratory of Low-carbon Green Agriculture in Northwestern China, Ministry of Agriculture and Rural Affairs, P.R.China, Yangling, Shaanxi 712100, China)
关键词:
樟子松;  植被恢复;  生态化学计量特征;  毛乌素沙地
Keywords:
Pinus sylvestris var. mongolica Litv;  Vegetation restoration;  Eco stoichiometry;  Mu Us sandy land
分类号:
S791.253
DOI:
10.13869/j.cnki.rswc.2023.06.047
文献标志码:
A
摘要:
[目的]探究沙漠化土地植被恢复过程的植物与土壤碳(C)、氮(N)、磷(P)化学计量特征的演变关系,可以深入认知樟子松固沙林植被恢复的机制。[方法]以榆林毛乌素沙地的半固定沙地为对照,分析了恢复25～56 a樟子松林下的物种多样性、樟子松植物组织(叶片、枯落物、细根)与土壤的C,N,P含量及其化学计量动态变化特征与交互作用。 [结果](1)樟子松植物组织C,N,P平均含量表现为:叶片>枯落物>细根,碳氮磷化学计量比为:枯落物>细根>叶片。(2)与半固定沙地相比,植被恢复后樟子松植物组织和土壤中的C,N,P含量显著变化。从恢复25 a到56 a,枯落物和土壤C含量分别显著增加了14.9%和61.5%,N含量分别显著增加了55.0%和52.4%。(3)随着恢复年限增加,枯落物和细根的C:N以及叶片和细根C:P,N:P均显著降低,叶片C:N及枯落物C:P,N:P显著增加。(4)枯落物与土壤C含量,细根与土壤N,P含量及植物组织与土壤间C:P均呈显著正相关关系。(5)植被恢复年限通过影响枯落物生物量和林下植被根量间接影响土壤C,N,P含量,且总效应最大。[结论]榆林沙区樟子松林植被恢复土壤C含量的增加与枯落物的输入密切相关,土壤N,P含量的增加主要与细根养分密切相关,C:P是影响樟子松林地植物-土壤间养分交互的关键化学计量比。
Abstract:
[Objective] Explore the evolving relationship between the chemical stoichiometry of carbon(C), nitrogen(N), and phosphorus(P)in plants and soil during the process of vegetation restoration on desertified land, and gain a deeper understanding of the vegetation restoration mechanism of Pinus sylvestris fixed sand forest. [Methods] This study compared the semi-fixed sand land in the Mu Us sandy land in Yulin as a control, and the species diversity, as well as the dynamic changes and interactive effects of C, N, and P contents and its stoichiometry in the vegetation(leaves, litter, fine roots)and soil was analyzed under 25～56-year-old Pinus sylvestris var. mongolica plantation during the restoration process. [Results](1)The average content of C, N, and P in the plant tissues of Pinus sylvestris is expressed as follows: leaves>litter>fine roots. The stoichiometric ratio among C, N and P was as follows: litter>fine roots>leaves.(2)Compared with the semi-fixed sand land, significant changes in the content of carbon(C), nitrogen(N), and phosphorus(P)were observed in the plant tissues and soil of Pinus sylvestris after vegetation restoration. From the 25 yeas to the 56 yeas of restoration, the content of C in litter and soil significantly increased by 14.9% and 61.5%, respectively, while N content increased significantly by 55.0% and 52.4%, respectively.(3)As the restoration time increases, the C:N ratios of litter and fine roots, as well as the C:P and N:P in leaf and fine root, all showed significant decreases. Meanwhile, the leaf C:N ratio and the litter C:P and N:P ratios exhibited significant increases.(4)There was a significant positive correlation between the C content in litter and soil, the content of N and P in fine roots and soil, and the C:P ratios between plant tissues and soil.(5)The restoration time of vegetation has the greatest total effect on the content of C, N and P in the soil by indirectly affecting the biomass of litter and the root mass of undergrowth vegetation. [Conclusion] The increase in soil C content during vegetation restoration in the Pinus sylvestris forest of Yulin sandy area was closely related to the input of litter. The increase in soil N and P content was mainly related to the nutrient uptake of fine roots. The C:P ratio is a key stoichiometric ratio that affected the nutrient exchange between plants and soil in Pinus sylvestris forests.

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备注/Memo

收稿日期:2022-11-21 修回日期:2023-03-01
资助项目:陕西省自然科学基金重点项目(2023-JC-ZD-10); 陕西省农业专项资金项目[NYKJ-2022-YL(XN)16]; 国家大学生创新创业训练计划项目(202210712158)
第一作者:拓卫卫(1997—),女,陕西榆林人,在读硕士研究生,研究方向为人工林系统碳循环。E-mail:861320024@qq.com
通信作者:佟小刚(1979—),男(锡伯族),新疆人,副教授,博士,主要从事人工林恢复生态效应与机制研究。E-mail:xiaogangtong@126.com

更新日期/Last Update: 2023-10-10