| 引用本文: | 张尧尧, 任启飞, 符行琴, 陈云飞.配方施肥对珙桐幼苗生长及其生态化学计量特征的影响[J].广西植物,2026,46(6):1003-1015.[点击复制] |
| ZHANG Yaoyao, REN Qifei, FU Hangqin, CHEN Yunfei.Effects of formula fertilization on seedling growth and ecological stoichiometric characteristics of Davidia involucrata[J].Guihaia,2026,46(6):1003-1015.[点击复制] |
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| 配方施肥对珙桐幼苗生长及其生态化学计量特征的影响 |
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张尧尧1, 任启飞2,3*, 符行琴1, 陈云飞2,3
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1. 贵州大学 林学院, 贵阳550025;2. 贵州省植物园, 贵阳 550004;3. 国家林业和
草原局西南喀斯特山地生物多样性保护重点实验室, 贵阳 550004
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| 摘要: |
| 为探究珙桐(Davidia involucrata)幼苗生长所需氮(N)、磷(P)、钾(K)的最佳施肥量,该研究以1年生珙桐幼苗为对象,通过盆栽控制试验,以黄棕壤为基质,测定其基本理化性质,采用“3414”测土配方施肥法设置N、P、K三个因素,0、1、2、3四个水平共14个处理(T1-T14),测定各处理生长条件下幼苗与叶、根生态化学计量特征指标,统计分析各指标的处理间差异及其相关关系。结果表明:(1)各处理珙桐幼苗叶和根的C含量差异较小; N、P含量表现出显著性差异(P<0.05),分别与N、P施肥水平呈正相关。(2)T2(N0P2K2)下叶和根的C:N、N:P失衡,限制了珙桐幼苗生长; 各处理下叶和根的N:P处于4.86至13.65之间,均低于14,受到N的限制。(3)比叶重、总生物量、株高增长量、地径增长量均表现为T11(N3P2K2)最低,分别比T1(N0P0K0)低6.78%、32.88%、18.91%、6.82%,T13(N1P2K1)促生长效果最显著,分别比T1高12.39%、82.37%、192.08%、120.45%。(4)相关分析显示,比叶重与根的N含量、叶和根的N:P呈显著正相关(P<0.05),总生物量与根的C含量呈显著正相关(P<0.05),生长特征与化学计量特征之间存在一定关联性。(5)多重比较结果显示,N对各生长特征及根的C、N含量和叶的N、P含量有显著影响(P<0.05),P对比叶重、株高增长量和地径增长量,以及叶和根的P含量有显著影响(P<0.05),K对比叶重、株高增长量、地径增长量有显著影响(P<0.05)。综上认为,盆栽珙桐幼苗应注重N、P、K的均衡施用,避免因N施加过量(7.95 g·plant-1)而造成抑制作用,T13(2.65 g N、1.0 g P2O5、1.50 g K2O)是珙桐幼苗生长的最佳施肥方案。该研究构建的珙桐幼苗精准施肥模式,为珙桐种群扩繁及自然回归提供了核心技术支撑,助力濒危物种资源保育。 |
| 关键词: 珙桐幼苗, 配方施肥, 化学计量特征, 养分积累, 植物保护 |
| DOI：10.11931/guihaia.gxzw202510029 |
| 分类号:Q945 |
| 文章编号:1000-3142(2026)06-1003-13 |
| 基金项目:贵州科学院科技计划项目(黔科院J字 [2019]07号); 贵州省社发科技攻关计划项目(黔科合SY字 [2013]3149号); 贵州喀斯特植物资源保育平台建设项目(黔科院科专合字 [201907]号)。 |
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| Effects of formula fertilization on seedling growth and ecological stoichiometric characteristics of Davidia involucrata |
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ZHANG Yaoyao1, REN Qifei2,3*, FU Hangqin1, CHEN Yunfei2,3
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1. College of Forestry, Guizhou University, Guiyang 550025, China;2. Guizhou Botanical Garden, Guiyang 550004, China;3. Key
Laboratory for Biodiversity Conservation in Karst Mountain Area of Southwestern China of the National
Forestry and Grassland Administration, Guiyang 550004, China
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| Abstract: |
| To explore the optimal fertilizing amount of nitrogen(N), phosphorus(P)and potassium(K)for the growth of Davidia involucrata seedlings, a pot control experiment was conducted with one-year-old seedlings as research object and yellow brown soil as the substrate whose basic physical and chemical properties were determined. The “3414” soil testing and formulated fertilization method was adopted to set three factors(N, P, K)with four levels(0, 1, 2, 3), with a total of 14 treatments in all(T1-T14). The seedling growth and ecological stoichiometric characteristics of leaves and roots under different treatments were determined, and the inter-treatment differences and correlation relationships of each index were statistically analyzed. The results were as follows:(1)The carbon(C)content in leaves and roots of D. involucrata seedlings showed relatively small differences among all treatments. The N and P contents showed significant differences(P<0.05), and they were positively correlated with the application levels of N and P fertilizers, respectively.(2)The C:N and N:P in leaves and roots under T2(N0P2K2)were unbalanced, which limited the growth of D. involucrata seedlings. The N:P ratios in leaves and roots among all treatments ranged from 4.86 to 13.65, all lower than 14, indicating the seedling growth was limited by N.(3)The leaf mass per area, total biomass, plant height increment and ground diameter increment were the lowest under T11(N3P2K2), which were 6.78%, 32.88%, 18.91% and 6.82% lower than those under T1(N0P0K0)respectively. T13(N1P2K1)had the most significant growth-promoting effect, with the above indicators being 12.39%, 82.37%, 192.08% and 120.45% higher than those under T1 respectively.(4)Correlation analysis showed that leaf mass per area was significantly positively correlated with root N content and N:P of leaves and roots(P<0.05), and total biomass was significantly positively correlated with root C content(P<0.05), indicating a certain correlation between growth traits and ecological stoichiometric characteristics.(5)Multiple comparison results showed that N had significant effects on all growth traits, as well as root C and N contents and leaf N and P contents(P<0.05). P had significant effects on leaf mass per area, plant height increment, ground diameter increment and P contents of leaves and roots(P<0.05). K had a significant effect on leaf mass per area, plant height increment and ground diameter increment(P<0.05). In conclusion, balanced application of N, P and K should be emphasized for potted D. involucrata seedlings, and excessive application of N fertilizer(7.95 g·plant-1)should be avoided due to its inhibitory effect on seedling growth. T13(2.65 g N, 1.00 g P2O5, and 1.50 g K2O)is the optimal fertilization scheme for the growth of D. involucrata seedlings. The precise fertilization model constructed in this study provides core technical support for the population propagation and natural reintroduction of D. involucrata, and contributes to the conservation of this endangered species resource. |
| Key words: Davidia involucrata seedlings, formula fertilization, stoichiometric characteristics, nutrient accumulation, plant protection |
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