Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (1): 181-188.DOI: 10.11733/j.issn.1007-0435.2025.01.020

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Physicochemical Properties and Stoichiometric Characterisation of Soils in Heterogeneous Environment in Photovoltaic Area

DU Xiao-dong1, LI Wei1, QI Xiang-yang2, SUN Zhi-yu2, SHI Guo-qing3, YANG Jing3, WANG Xin-yao3, SUI Xiao-qing3   

  1. 1. CHN Energy Xinjiang Jilintai Hydropower Development Co., Ltd., Yili, Xinjiang 835000, China;
    2. Xinjiang Water Conservancy and Hydropower Survey Design Institute Co., Ltd., Urumqi, Xinjiang 830000, China;
    3. College of Grassland Science, Xinjiang Agricultural University/Xinjiang Key Laboratory of Grassland Resources and Ecology/Key Laboratory of Grassland Resources and Ecology of Western Arid Region, Ministry of Education, Urumqi, Xinjiang 830052, China
  • Received:2024-05-10 Revised:2024-07-07 Published:2025-01-22

光伏区异质环境下土壤理化特性及化学计量特征分析

杜孝东1, 李伟1, 齐向阳2, 孙智宇2, 石国庆3, 杨静3, 王鑫尧3, 隋晓青3   

  1. 1. 国家能源集团新疆吉林台水电开发有限公司, 新疆 伊犁 835000;
    2. 新疆水利水电勘测设计研究院有限责任公司, 新疆 乌鲁木齐 830000;
    3. 新疆农业大学草业学院/新疆草地资源与生态重点实验室/西部干旱荒漠区草地资源与生态教育部重点实验室, 新疆 乌鲁木齐 830052
  • 通讯作者: 隋晓青，E-mail：sxq303@xjau.edu.cn
  • 作者简介:杜孝东（1967-）,男,汉族,山东菏泽人,高级工程师,主要从事水利水电工程领域,E-mail：471163141@qq.com
  • 基金资助:
    基于流域集中控制水力发电基础上的水光互补、牧光互补组合发电清洁能源新模式研究（W2023-099）资助

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Abstract: To investigate the effects of the heterogeneous environment within photovoltaic （PV） area on physicochemical characteristics of desert grassland soils in the Ili Kazakh Autonomous Prefecture, Xinjiang, sampling sites were divided into five treatments based on the spatial arrangement of PV panels： between PV panels, in front of PV panels, under PV panels, behind PV panels, and outside of PV panels （control group）. The physicochemical characteristics of soil across different soil horizons （0-10 cm, 10-20 cm, and 20-30 cm） and soil stoichiometric characteristics were analyzed. The results indicated that soil water content significantly increased in the PV panel treatment area, with an average increase of 62.35% in the 10-30 cm soil layer. Overall, there were no significant differences in soil pH, electrical conductivity, and total nitrogen content among treatments. Soil pH value in the 0-30 cm layer under the PV panels ranged from 8.51 to 8.75, electrical conductivity ranged from 364.40 to 538.07 μS·cm-1, and total nitrogen content ranged from 1.58 to 2.03 g·kg-1. No significant differences were observed in the ratios of C∶N, C∶P, and N：P across soil layers, except that of in the 20-30 cm layer where the N∶P ratio under the PV panels was significantly lower than that of the control. Soil stoichiometric characteristics at some sampling points in the PV panel treatment area were superior to those of the control group. Correlation analysis revealed there were highly significant positive correlations between C∶N and SOC, C∶P and SOC, C∶P and C∶N, N：P and TN, and N∶P and C∶P （P<0.01）. In conclusion, the heterogeneous environment of the PV area can enhance the physicochemical characteristics of desert grassland soils, providing a favorable reference base for the restoration of grassland vegetation and the subsequent replanting of grass species in the future.

Key words: Photovoltaic area, Soil physicochemical properties, Soil stoichiometric characteristics

摘要： 为探究光伏区异质环境对新疆伊犁哈萨克自治州荒漠草地土壤理化特性影响,根据光伏板空间布局将取样位置划分为光伏板间、光伏板前檐、光伏板下方、光伏板后檐以及光伏板外（对照组）5种处理,并对其不同土层的土壤理化特性及土壤化学计量特征进行分析研究。结果表明：光伏板处理区土壤含水量显著增加,其中10~30 cm土层土壤含水量平均增加62.35%；总体上,pH值、电导率和全氮无显著性差异,其中光伏板处理区的0~30 cm土层土壤pH值范围在8.51~8.75,电导率范围在364.40~538.07 μS·cm-1,全氮范围在1.58~2.03 g·kg-1；除20~30 cm土层前檐N∶P显著低于对照,其余各土层C∶N,C∶P和N∶P无显著性差异；光伏板处理区部分取样位置土壤化学计量特征高于对照；相关性分析表明C∶N和SOC,C∶P和SOC,C∶P和C∶N,N∶P和TN,N∶P和C∶P存在极显著正相关性（P<0.01）。综上,光伏区异质环境能够改善该地区荒漠草地土壤理化特性,为今后草地植被的恢复和后续草种补播提供了有利参考依据。

关键词: 光伏区, 土壤理化特性, 化学计量特征

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