| 引用本文: | 余博航,范强勇,程 林,等.武夷山国家公园不同土壤类型土壤持水
能力与养分特征及其关系[J].灌溉排水学报,2026,45(5):87-96. |
| YU Bohang,FAN Qiangyong,CHENG Lin,et al.武夷山国家公园不同土壤类型土壤持水
能力与养分特征及其关系[J].灌溉排水学报,2026,45(5):87-96. |
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| 摘要: |
| 【目的】探究不同土层深度和土壤类型的持水能力与养分特征及其相互关系，为武夷山地区的生态保护和土壤管理提供更精准的科学依据。【方法】在武夷山国家公园（江西片区）选取红壤、黄红壤、黄壤、山地草甸土4种土壤类型，分层采集0~15 cm和15~30 cm土层土样，测定土壤饱和含水率、总有机碳、铵态氮、硝态氮、总有机氮、总无机磷和总有机磷，并采用Wilcoxon秩和检验、Spearman相关性分析和主成分分析探讨不同土壤类型土壤持水能力与养分特征及其相互关系。【结果】①表层（0~15 cm）土壤饱和含水率及各养分指标含量均显著高于亚层（15~30 cm）（P＜0.05）。②除硝态氮外，土壤饱和含水率及各养分指标在不同土壤类型间差异显著（P＜0.05），整体表现为山地草甸土＞黄壤＞黄红壤＞红壤。③表层土壤饱和含水率与各养分指标含量显著正相关（P＜0.05），亚层土壤饱和含水率除与硝态氮无显著相关性外，与其余养分均显著正相关（P＜0.05）。④主成分分析表明，红壤与山地草甸土之间的持水和养分特性差异明显，土壤饱和含水率、总有机碳和总有机氮是差异的主要来源。⑤土壤饱和含水率与养分含量的相关性因土壤类型而异：红壤中土壤饱和含水率仅与总有机磷显著负相关（P＜0.05）；黄红壤中土壤饱和含水率与2种无机氮无显著相关性（P＞0.05），而与其他养分指标显著正相关（P＜0.05）；黄壤中土壤饱和含水率与总无机磷无显著相关性（P＞0.05），但与其他养分均显著正相关（P＜0.05）；山地草甸土中土壤饱和含水率与3种有机养分均显著正相关（P＜0.05）。【结论】不同土壤类型土壤持水能力与养分含量存在显著的垂直分异，且二者的耦合关系随土壤类型呈从物理淋溶主导到有机质积累协同的规律性演变。 |
| 关键词: 土壤饱和含水率；土壤有机碳；山地草甸土；主成分分析 |
| DOI：10.13522/j.cnki.ggps.2025221 |
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| Soil water-holding capacity, nutrient characteristics, and their interrelationships in Wuyi Mountain National Park |
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YU Bohang, FAN Qiangyong, CHENG Lin, ZHAO Yuze, CAO Shining, WANG Jianming
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1. School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China;
2. Wuyi Mountain National Park Jiangxi Authority, Shangrao 334500, China
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| Abstract: |
| 【Objective】 The Wuyi Mountain in Southeastern China is characterized by complex topography and diverse soil types. This paper presents the results of an experimental study on water-holding capacity and nutrient content of soils at different depths in this region, aiming to provide a database to support ecosystem management and soil conservation strategies.【Method】The study focused on four types of soils in the region: red soil, yellow-red soil, yellow soil, and mountain meadow soil. Soil samples were collected from two depths: 0-15 cm and 15-30 cm at various locations over the region. For each sample, we measured soil saturated water content, total organic carbon, ammonium nitrogen, nitrate nitrogen, total organic nitrogen, total organic phosphorus, and total inorganic phosphorus. Wilcoxon rank-sum tests, Spearman correlation analysis and principal component analysis were used to analyze water- holding capacity, nutrient contents, and their interrelationships. 【Result】①Saturated water content and all nutrient indices in the topsoil soil layer (0-15 cm) were higher than those in the subsoil layer (15-30 cm) (P＜0.05). ②Except for nitrate nitrogen, saturated water content and all nutrient indices differed among the four soil types (P＜0.05), following the order: mountain meadow soil＞yellow soil＞yellow-red soil＞red soil. ③In the topsoil layer, saturated water content was positively correlated with all nutrient indices (P＜0.05), whereas in the subsoil layer, it was positively correlated with all nutrients except nitrate nitrogen (P＞0.05). ④Principal component analysis indicated that differences in water-holding capacity and nutrient properties were most pronounced between red soil and mountain meadow soil, with saturated water content, total organic carbon, and total organic nitrogen being the main contributors. ⑤The correlation between saturated soil water content and nutrient content varied by soil type: in red soil, it was negatively correlated with total organic phosphorus (P＜0.05); in yellow-red soil, it was insignificantly correlated with inorganic nitrogen (P＞0.05) but was significantly positively correlated with other nutrient indicators (P＜0.05); in yellow soil, it was insignificantly correlated with total inorganic phosphorus (P＞0.05) but significantly positively correlated with other nutrients (P＜0.05); in mountain meadow soil, it was significantly positively correlated with all three organic nutrients (P＜0.05).【Conclusion】Water-holding capacity and nutrient contents exhibited pronounced vertical differentiation in all four soil types. Their coupling relationships shifted from being dominated by physical- leaching processes in less fertile soils to being jointly regulated by organic matter accumulation in more fertile soils. |
| Key words: soil saturated water content; soil organic carbon; mountain meadow soil; principal component analysis |
