WANG Ding,WANG Zixuan,NIU Huihui,et al.Soil Characteristics of Russian Olive and Caragana Mixed Forests With Different Degradation Degrees in the Lower Reaches of the Shiyang River[J].Northern Horticulture,2026,(4):93-100.[doi:10.11937/bfyy.20252197]
石羊河下游不同退化程度沙枣-柠条混交林土壤养分特征
- Title:
- Soil Characteristics of Russian Olive and Caragana Mixed Forests With Different Degradation Degrees in the Lower Reaches of the Shiyang River
- 文章编号:
- 1001-0009(2026)04-0093-08
- Keywords:
- lower reaches of the Shiyang river; degradation degrees; mixed forest of russian olive and caragana
- 分类号:
- S718.5
- 文献标志码:
- A
- 摘要:
- 以甘肃省武威市民勤县石羊河下游沙枣-柠条混交林为研究对象,采用野外调查与室内分析方法,研究了不同退化程度下沙枣-柠条混交林土壤理化性质的变化规律,以期为当地植被恢复与土壤改良提供参考依据。结果表明:1)随着退化程度加剧,各土层(0~2、2~5、5~10 cm)土壤全氮、速效钾含量显著降低(P<0.05),与轻度退化相比,中度、重度土壤全氮含量在各土层中降低了14.91%~98.51%,速效钾含量降低了35.89%~85.71%。土壤有效磷含量随着退化程度加剧在0~2 cm和5~10 cm土层中显著降低(P<0.05),中度、重度退化林地土壤有效磷含量较轻度降低了23.56%~66.67%。随着退化程度加剧,土壤有机碳含量在0~2 cm土层中显著降低,土壤pH在5~10 cm土层中显著增加(P<0.05),土壤全钾含量变化不明显。2)在不同退化程度下,土壤有机碳、有效磷含量随土层深度增加而显著降低,土壤pH随土层深度增加而显著增加(P<0.05),土壤全磷、全钾含量随土层深度增加变化不明显。土壤全氮含量在轻度、中度、重度沙枣-柠条混交林中随土层深度增加而显著降低(P<0.05)。总体来看,不同退化程度对速效养分扰动较大,对土壤全钾养分干扰较小。
- Abstract:
- Taking the mixed forest of Jujube and Caragana in the lower reaches of Shiyang River in Minqin county,Wuwei city,Gansu Province as the research object,field investigation and indoor analysis methods were adopted to study the variation laws of soil physical and chemical properties of the mixed forest of jujube and caragana under different degrees of degradation,in order to provide reference for local vegetation restoration and soil improvement.The results showed that with increasing degradation severity,the total nitrogen and available potassium contents in each soil layer (0-2,2-5,5-10 cm) significantly decreased.Compared with light degradation,the total nitrogen content in moderate and severe degradation decreased by 14.91% to 98.51%,and the available potassium content decreased by 35.89% to 85.71% in each soil layer.The available phosphorus content in the soil significantly decreased with the intensification of degradation in the 0-2 cm and 5-10 cm layers,with moderate and severe degradation reducing available phosphorus content by 23.56% to 66.67% compared to light degradation.As degradation intensified,the soil organic carbon content significantly decreased in the 0-2 cm layer;soil pH significantly increased in the 5-10 cm layer,while changes in total potassium content were not significant.Besides,at different levels of degradation,soil organic carbon and available phosphorus content significantly decreased with increasing soil depth,while soil pH significantly increased with increasing soil depth.The content of total phosphorus and total potassium in the soil did not change significantly with increasing soil depth.The content of total nitrogen in the soil significantly decreased with increasing soil depth in light,moderate,and severe russian olive and caragana mixed forests.Overall,different levels of degradation have a greater impact on readily available nutrients,while causing less interference with total potassium in the soil.
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备注/Memo
第一作者简介:王鼎(1989-),男,博士,讲师,现主要从事土壤资源改良与利用等研究工作。E-mail:15147124612@163.com.责任作者:褚润(1981-),女,博士,副教授,硕士生导师,现主要从事修复生态学等研究工作。E-mail:churun3@126.com.基金项目:甘肃省农业大学科研启动基金资助项目(GAU-KYQD-2020-25);陇原青年创新创业人才资助项目(2023LQGR58);甘肃省高校青年博士支持资助项目(2023QB-131);2024年度部省合作资助项目(2024ZRBSHZ120);甘肃省重大科技任务-中央引导地方科技发展资助项目(25ZYJA032)。收稿日期:2025-06-16