太统-崆峒山4种典型植被土壤微量元素变化特征  

Soil micronutrient characteristics of four typical vegetation types in the Taitong-Kongtong Mountains

作　　者：柳轲 黄海霞[1] 胡玉龙 LIU Ke;HUANG Haixia;HU Yulong(College of Forestry,Gansu Agricultural University,Lanzhou,730070,China;Gansu Taitong Kongtongshan National Nature Reserve Management Center,Pingliang 744000,China)

机构地区：[1]甘肃农业大学林学院,甘肃兰州730070 [2]甘肃太统崆峒山国家级自然保护区管护中心,甘肃平凉744000

出　　处：《甘肃农业大学学报》2024年第5期237-245,共9页Journal of Gansu Agricultural University

基　　金：太统崆峒山国家级自然保护区综合监测项目(20211111)。

摘　　要：【目的】探究退耕还林背景下人工林土壤有效态微量元素含量的变化,为太统-崆峒山自然保护区生态系统土壤养分管理提供参考。【方法】以太统-崆峒山自然保护区的4种典型植被(荒草地、人工林刺槐林地、人工落叶松林以及人工油松林地)作为研究对象,对其0~30 cm土壤pH、有机质含量以及土壤中有效态微量元素的变化特征进行分析。【结果】4种植被类型土壤pH均在10~20 cm土层最大,且刺槐人工林土壤pH显著高于其他植被类型(P<0.05)。在0~10 cm和10~20 cm土层中落叶松人工林有机质含量显著高于其他植被类型(P<0.05),但在20~30 cm土层中油松人工林有机质含量最高。刺槐人工林和荒草地有效态微量元素表现出一定的“表聚”性。油松人工林土壤有效锌、有效锰、有效铜和有效铁含量均显著高于荒草地、人工林刺槐林地以及人工落叶松林(P<0.05);落叶松人工林土壤有效硼含量显著高于其他植被类型(P<0.05)。相关分析表明土壤有效态微量元素与pH和有机质含量之间存在着相关关系,但不同植被类型相关性存在差异。【结论】不同植被类型的土壤pH、有机质以及有效态微量元素之间存在显著差异,且人工林的土壤pH、有机质含量以及有效态微量元素显著高于荒草地,研究结论可为区域资源优化配置提供一定的参考意见。【Objective】To study changes in the effective state trace element content of plantation soils in the context of fallow forest,which can provide a reference for soil nutrient management in the Tai Tong-Kongtong Mountain Nature Reserve ecosystem.【Method】Four typical vegetation types(barren grassland,planted acacia forest,planted larch forest and planted oil pine forest)in the Taitung-Kongtong Mountain Nature Reserve were used to analyze the changes in soil pH,organic matter content and effective state trace elements in the 0~30 cm soil.The variation of pH,organic matter and total organic matter were analyzed by ANOVA and correlation analysis.【Result】The soil pH of all four vegetation types was highest in the 10~20 cm soil layer,and the soil pH of the acacia plantation was significantly higher than the other vegetation types(P<0.05).The organic matter content of larch plantations was significantly higher than other vegetation types in the 0~10 cm and 10~20 cm soil layers(P<0.05),but the highest organic matter content was found in the 20~30 cm soil layer of Pinus oleifera plantations.The effective state trace elements in bristlecone plantation forests and barren grasslands showed some surface aggregation.The contents of effective Zn,Mn,Cu and Fe were significantly higher in P.oleifera plantations than in barren grassland,acacia plantations and larch plantations(P<0.05);the contents of effective B in larch plantations were significantly higher than in other vegetation types(P<0.05).Correlation analysis showed that there was a correlation between soil effective state trace elements and pH and organic matter content,but the correlation differed between vegetation types.【Conclusion】There were significant differences between soil pH,organic matter and effective state trace elements of different vegetation types,and soil pH,organic matter content and effective state trace elements of plantation forests were significantly higher than those of heathland.The results of the study can provide some pointers for th

关 键 词：太统-崆峒山 植被类型 微量元素 有机质 

分 类 号：S153.61[农业科学—土壤学]