| 辜祖超.椪柑园亚表层和深土层土壤的酸化特征及主控因素[J].中国南方果树,2026,55(4):38-42 |
| 椪柑园亚表层和深土层土壤的酸化特征及主控因素 |
| Characteristics and main controlling factors of subsurface and deep layer soil acidification in ponkan orchards |
| 投稿时间：2025-09-04 修订日期：2025-11-20 |
| DOI： |
| 中文关键词: 椪柑 亚表层和深土层土壤 酸化 影响因素 |
| 英文关键词:Ponkan subsurface and deep layer soil acidification controlling factors |
| 基金项目:中央农业资源及生态保护(耕地质量提升) 项目资助(闽财农指(2022)32号)。 |
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| 中文摘要: |
| 采集福建省永春县25个椪柑园表层(0~20 cm)、亚表层(20~40 cm)和深土层(40~60 cm)土壤,测定表征土壤酸化特征的pH值和酸缓冲容量(pHBC),研究pH值、pHBC与土壤有机质、阳离子交换量(CEC)、盐基饱和度以及碱解氮、有效硫、交换性钙、交换性镁含量的关系,分析椪柑园亚表层和深土层土壤酸化的主控因素。结果表明,椪柑园土壤pH值和pHBC均随土层深度的加深而降低,与表层土壤相比较,亚表层和深土层土壤的pH平均值分别降低了0.24 和0.42个单位,pHBC平均值分别降低了5.51%和8.82%,说明椪柑园亚表层和深土层土壤的酸化比表土层更严重。影响因子分析表明,土壤有机质、交换性钙、交换性镁含量、CEC和盐基饱和度是影响亚表层和深土层土壤酸化的主控因素。本研究可为柑橘园深层土壤酸化改良提供理论依据。 |
| 英文摘要: |
| Surface (0~20 cm),subsurface (20~40 cm) and deep layer (40~60 cm) soils from 25 ponkan orchards in Yongchun county, Fujian province, were collected. Soil acidification characteristics of pH and acid buffering capacity (pHBC) were tested. The relationship between soil pH, pHBC and soil organic matter, cation exchange capacity (CEC), base saturation, alkali-N, avail-S, exchangeable calcium, exchangeable magnesium were analyzed to identify the main controlling factors of subsurface and deep layer soil acidification. The results showed soil pH and pHBC decreased with the increase of soil depth. Compared to the surface soil, the average pH of subsurface soil and deep layer soil decreased by 0.24 and 0.42 units, respectively, while pHBC declined by 5.51% and 8.82%, respectively, indicating more severe acidification of subsurface soil and deep layer soil in ponkan orchards. Correlation analysis revealed low levels of soil organic matter, exchangeable calcium, exchangeable magnesium, CEC, and base saturation were the main causes of subsurface soil and deep layer soil acidification in ponkan orchards. This study provides theoretical basis forSdeep soil acidification improvementSofSponkan orchards. |
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