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| 不同配置模式祁连圆柏人工林下草本植物多样性特征 |
| Diversity Characteristics of Understory Herbs in Juniperus przewalskiiPlantations with Different Configuration Patterns |
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| DOI： |
| 中文关键词: 林下草本植物 多样性特征 树种配置模式 祁连圆柏人工林 张掖市 |
| 英文关键词: Understory herbs Diversity characteristics Tree species configuration patterns Juniperus przewalskii plantations Zhangye |
| 基金项目:国家自然科学基金资助项目（32060337）；甘肃省科技计划基金资助项目（25JRRG043）；甘肃省林业和草原科技计划基金资助项目（2018kj019，2020kj006，2020kj005）；张掖市科技计划基金资助项目（ZY2023RC11） |
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| 中文摘要: |
| 以干旱荒漠区不同树种配置的祁连圆柏人工林为研究对象，研究在不同配置模式下祁连圆柏人工林下草本植物物种组成、多样性特征，以及多样性指数、优势种与郁闭度、土壤理化性质的相关关系。结果表明：研究区林下草本层共有植物14科34属45种，以禾本科（Gramineae）、菊科（Compositae）、藜科（Chenopodiaceae）、豆科（Leguminosae）植物物种居多；祁连圆柏混交林相比于纯林林分，草本植物物种丰富度明显增加，各林分草本层物种丰富度和林下草本植物科、属、种组成由多到少排序依次为祁连圆柏小叶梣混交林＞祁连圆柏沙棘混交林＞祁连圆柏樟子松混交林＞祁连圆柏纯林；草本层植物物种数、Margalef指数与郁闭度、土壤含水率、有机质、全氮、碱解氮均呈极显著正相关关系，与土壤容重呈极显著负相关关系。 |
| 英文摘要: |
| Taking Juniperus przewalskii plantations in arid desert areas as the research object， this study focused on the species composition and diversity characteristics of understory herbs in Juniperus przewalskii plantations with different configuration patterns， as well as the correlations between diversity indices， dominant species， canopy densities and soil physicochemical properties. The results showed that a total of 45 species of herbaceous plants， belonging to 34 genera and 14 families， were identified in the understory herb 〖JP2〗layer in the study area， with Gramineae， Compositae， Chenopodiaceae， and Leguminosae being the dominant families. Compared with pure stands， the species richness of understory herbs in Juniperus przewalskii plantations significantly increased. The species richness of the herb layer and the composition of families， genera， and species of understory herbaceous plants in each stand， ranked from high to low， were mixed plantations of Juniperus przewalskii and Fraxinus bungeana， mixed plantations of Juniperus przewalskii and Hippophae rhamnoides， mixed plantations of Juniperus przewalskii and Pinus sylvestris var.mongolica， 〖JP3〗and pure plantations of Juniperus przewalskii. The number of species and Margalef index of the herb layer plants were 〖GK!87mm〗extremely significantly positively correlated with canopy 〖JP4〗densities， soil moisture， organic matter， total nitrogen， and alkali hydrolyzable nitrogen， and extremely significantly negatively correlated with soil bulk density. |
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