Effects of Fertile Island Size on Soil Quality Index in Haloxylon ammodendron Forests

doi:10.11733/j.issn.1007-0435.2026.10.022

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (10): 3761-3772.DOI: 10.11733/j.issn.1007-0435.2026.10.022

Effects of Fertile Island Size on Soil Quality Index in Haloxylon ammodendron Forests

YUAN Tao^1,2, WANG Zhen², LONG Zhi-jun^1,2, LIU Xing-yuan³, SHI Zheng-chen², LI Hong-lin¹, ZHANG Zhong-hua², HE Qin-en⁴, SONG Wei-xiu¹, Pengmaodangzhi⁵, ZHOU Hua-kun²

1. College of Agriculture and Animal Husbandry, Qinghai University, Xining, Qinghai Province 810016, China;
2. Key Laboratory of Cold Region Restoration Ecology, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai Province 810008, China;
3. College of Geography Science, Qinghai Normal University, Xining, Qinghai Province 810008, China;
4. College of Animal Science and Veterinary Medicine, Qinghai University, Xining, Qinghai Province 810016, China;
5. Service Center of Qinghai Qaidam Haloxylon ammodendron National Nature Reserve, Haixi, Qinghai Province 817000, China

Received:2025-12-24 Revised:2026-02-03 Published:2026-10-10

梭梭林肥岛大小对土壤质量指数的影响

袁梼^1,2, 王榛², 龙治君^1,2, 柳兴媛³, 史正晨², 李宏林¹, 张中华², 何琴恩⁴, 宋维秀¹, 朋毛当智⁵, 周华坤²

1. 青海大学农牧学院, 青海西宁 810016;
2. 中国科学院西北高原生物研究所/青海省寒区恢复生态学重点实验室, 青海西宁 810008;
3. 青海师范大学地理科学学院, 青海西宁 810008;
4. 青海大学畜牧兽医科学院, 青海西宁 810016;
5. 青海柴达木梭梭林国家级自然保护区服务中心, 青海海西 817000

通讯作者: 周华坤, E-mail: hkzhou@nwipb.cas.cn
作者简介:袁梼（1998-），女，汉族，重庆人，硕士研究生，主要从事自然保护地管理研究，E-mail：yt1423255171@163.com
基金资助:
青海柴达木梭梭林国家级自然保护区2024年中央林业草原生态保护恢复资金补助项目（ZY-2024-005）；青海柴达木梭梭林国家级自然保护区2023年第一批、第四批中央林业草原生态保护恢复资金国家级自然保护区补助项目（ZY-2023-782）；青海省基础研究计划自然科学基金青年项目（2025-ZJ-906Q）资助

Abstract

Abstract: This study aims to reveal the variation patterns of the soil quality index （SQI） across fertile islands of different sizes， providing a scientific basis for soil quality assessment and ecological restoration in typical desertification areas. The research was conducted in the Haloxylon ammodendron forest in the Qaidam Basin， China （Delingha section： DLH； Wulan section： WL； Dulan section： DL）. Fertile islands of different sizes were quantified to analyze their effects on vegetation characteristics， soil biochemical properties， and SQI. Structural equation modeling （SEM） was used to identify the key factors influencing SQI. The results showed that the aboveground biomass and height of H. ammodendron increased significantly with increasing fertile island size. SQI increased with fertile island size， and SQI in large and medium islands was significantly higher than in bare land. The fertile island effect was mainly concentrated in the surface soil layer of 0~30 cm. Fertile island size had no significant effect on soil enzyme activities， but microbial biomass carbon in DLH and DL， and soil organic carbon in DL， increased significantly with increasing fertile island size. SEM results indicated that precipitation was an important factor regulating SQI， while soil organic carbon was identified as the key driving factor.

Key words: Fertile island, Soil quality index, Haloxylon ammodendron, Desertification, Structural equation modeling

摘要： 本研究旨在揭示不同肥岛大小下土壤质量指数（Soil quality index， SQI）的变化规律及其关系，为典型荒漠化地区土壤质量评价及生态修复提供科学依据。研究地点为柴达木盆地梭梭（Haloxylon ammodendron）林自然保护区（德令哈分区：DLH；乌兰分区：WL；都兰分区：DL），对不同大小的肥岛进行量化研究，分析肥岛大小对植被特征、土壤生化指标及SQI的影响，并利用结构方程模型（Structural equation modeling， SEM）识别影响SQI的关键因子。结果表明，梭梭地上生物量和高度，均随着肥岛大小增加而显著上升。SQI随肥岛增大而提高，其中大肥岛和中肥岛显著高于裸地，肥岛效应主要体现在表层0~30 cm土壤。肥岛大小对土壤酶活性影响不显著，但DLH和DL的微生物量碳及DL的土壤有机碳随肥岛的增大而显著提高。SEM表明，降水是调控SQI的重要因素，土壤有机碳是核心驱动力。

关键词: 肥岛, 土壤质量指数, 梭梭, 荒漠化, 结构方程模型

CLC Number:

X825

YUAN Tao, WANG Zhen, LONG Zhi-jun, LIU Xing-yuan, SHI Zheng-chen, LI Hong-lin, ZHANG Zhong-hua, HE Qin-en, SONG Wei-xiu, Pengmaodangzhi, ZHOU Hua-kun. Effects of Fertile Island Size on Soil Quality Index in Haloxylon ammodendron Forests[J]. Acta Agrestia Sinica, 2026, 34(10): 3761-3772.

袁梼, 王榛, 龙治君, 柳兴媛, 史正晨, 李宏林, 张中华, 何琴恩, 宋维秀, 朋毛当智, 周华坤. 梭梭林肥岛大小对土壤质量指数的影响[J]. 草地学报, 2026, 34(10): 3761-3772.

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Effects of Fertile Island Size on Soil Quality Index in Haloxylon ammodendron Forests

梭梭林肥岛大小对土壤质量指数的影响

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