| 古 云,姚 遥.初植密度对不同林龄红豆杉功能性状及土壤理化性质影响[J].林业调查规划,2026,51(2):146-153 |
| 初植密度对不同林龄红豆杉功能性状及土壤理化性质影响 |
| Effects of Initial Planting Density on Functional Traits and Soil Physicochemical Properties of Taxus chinensis at Different Stand Ages |
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| DOI： |
| 中文关键词: 初植密度 不同林龄红豆杉 功能性状 土壤理化性质 耦合关系 |
| 英文关键词: initial plant density Taxus chinensis at different stand ages functional traits soil physicochemical properties coupling relationship |
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| 中文摘要: |
| 为获知初植密度对不同林龄红豆杉功能性状、林下土壤理化性质的影响及其耦合关系,对陕
西省略阳县某红豆杉样地3种林龄红豆杉进行调查研究。结果表明,初植密度越大,红豆杉功能性状越好,其中3 000株/hm2初植密度下林龄10、20、30 a红豆杉叶干重、叶厚度、叶干物质含量、比叶面积、叶片磷质量分数、叶片钾质量分数、叶片氮质量分数优于其他初植密度(P<0.05);随着林龄增加,土壤容重逐渐降低,含水量逐渐增加,土壤全氮、速效钾含量逐渐提升,对速效磷含量无显著影响。其中,3 000株/hm2和2 400株/hm2初植密度下林下土壤理化性质指标优于其他初植密度(P<0.05);从耦合关系上看,1 800、2 400、3 000、3 600株/hm2初植密度下红豆杉功能性状和土壤理化性质分别属于中度失调、勉强协调、初级协调、严重失调模式,3 000株/hm2初植密度下红豆杉功能性状和土壤理化性质耦合度最佳。由此说明,初植密度对不同林龄红豆杉功能性状及林下土壤理化性质产生一定影响,初植密度3 000株/hm2时不同林龄红豆杉各方面表现优于其他初植密度。 |
| 英文摘要: |
| To understand the effects of initial planting density on the functional traits and understory soil physicochemical properties of Taxus chinensis at different stand ages and their coupling relationships, this study investigated Taxus chinensis stands of three ages in a sample plot in Lueyang County, Shaanxi Province. The results showed that higher initial planting densities led to better functional traits of Taxus chinensis. Specifically, at an initial planting density of 3 000 plants/hm2, the leaf dry weight, leaf thickness, leaf dry matter content, specific leaf area, and mass fractions of leaf phosphorus, potassium, and nitrogen of 10 a, 20 a and 30 a Taxus chinensis were superior to those at other densities (P<0.05). With increasing stand age, soil bulk density gradually decreased, soil moisture content gradually increased, and soil total nitrogen and available potassium contents improved, while available phosphorus content was not significantly affected. Soil physicochemical properties under initial planting densities of 3 000 plants/hm2 and 2 400 plants/hm2 were superior to those under other densities (P<0.05). In terms of coupling relationships, the interactions between functional traits and soil physicochemical properties under initial planting densities of 1 800, 2 400, 3 000 and 3 600 plants/hm2 were categorized as moderate imbalance, barely coordinated, primary coordination, and severe imbalance modes, respectively. The coupling degree was optimal at an initial planting density of 3 000 plants/hm2. These results indicate that initial planting density significantly influences the functional traits and understory soil physicochemical properties of Taxus chinensis at different stand ages, with a density of 3 000 plants/hm2 yielding the best overall performance. |
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