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易中明,李永盛,庞朱良,吴桐,程辉,杨梅,姚贤宇.不同施肥处理对观光木容器苗生长生理的影响[J].广西科学,2026,33(3):608-621. [点击复制]
- YI Zhongming,LI Yongsheng,PANG Zhuliang,WU Tong,CHENG Hui,YANG Mei,YAO Xianyu.Effects of Different Fertilization Treatments on Growth Physiology of Container Seedlings of Tsoongiodendron odorum[J].Guangxi Sciences,2026,33(3):608-621. [点击复制]
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| 不同施肥处理对观光木容器苗生长生理的影响 |
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易中明1, 李永盛2, 庞朱良2, 吴桐1, 程辉1, 杨梅1, 姚贤宇1
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| (1.广西大学林学院, 广西高校亚热带人工林培育与利用重点实验室, 广西南宁 530004;2.南宁树木园, 广西南宁 530031) |
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| 摘要: |
| 为明确不同施肥季节和氮(N)、磷(P)、钾(K)养分组合对观光木(Tsoongiodendron odorum)幼苗生长、光合生理及叶片养分的阶段性影响，进而找出关键促进元素，构建适应季节差异的施肥制度，本研究以10月龄观光木实生苗为对象，分别于春季(2月)与秋季(10月)开展施肥试验。每个季节设置7种施肥处理，包括N、P、K单施以及NP、NK、PK、NPK配施，并以不施肥为空白对照(CK)。测定观光木容器苗生长、光合特性及叶片养分等指标，综合评估不同施肥策略对观光木容器苗生长与光合特性的调控作用。结果表明：组合施肥效果显著优于单施。春季为观光木幼苗快速生长期，NK处理表现最佳，其质量指数(QI)值与生物量最高，并显著提升净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)及叶绿素含量(较CK提升116.19%)。秋季观光木以养分储备为主，NP处理木质素含量最高，纤维素含量、全株生物量、QI值、Pn、Gs、Tr、叶片全磷含量仅次于NK处理。相关性分析表明，叶片全氮含量与叶绿素、纤维素含量呈显著正相关，是驱动光合能力提升的关键；春季NK和秋季NP处理主成分综合得分排名居首位。观光木容器苗的生长与光合特性对施肥制度的响应具有显著的季节特异性。建议使用“春施NK秋施NP”的差异化施肥策略，以有效促进营养生长与光合性能，为珍稀濒危树种优质苗木的高效培育提供理论支撑与应用路径。 |
| 关键词: 观光木 施肥季节 氮 磷 钾 幼苗生长 光合能力 |
| DOI：10.13656/j.cnki.gxkx.20260319.002 |
| 投稿时间：2025-11-07修订日期：2026-01-11 |
| 基金项目:广西自筹经费林业科技项目“桉树与珍贵树木人工复层林经营与其心材特征成分利用研究”(2024GXZCLK34)资助。 |
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| Effects of Different Fertilization Treatments on Growth Physiology of Container Seedlings of Tsoongiodendron odorum |
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YI Zhongming1, LI Yongsheng2, PANG Zhuliang2, WU Tong1, CHENG Hui1, YANG Mei1, YAO Xianyu1
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| (1.Key Laboratory of Subtropical Plantation Cultivation and Utilization, School of Forestry, Guangxi University, Nanning, Guangxi, 530004, China;2.Nanning Arboretum, Nanning, Guangxi, 530031, China) |
| Abstract: |
| This study explored the effects of different fertilization seasons and combinations of nitrogen (N),phosphorus (P),and potassium (K) on the growth,photosynthetic physiology,and leaf nutrients of Tsoongiodendron odorum seedlings,aiming to find out the key promoting elements and construct a fertilization system adaptive to seasonal differences.The 10-month-old T.odorum seedlings were used for the fertilization experiment,which was carried out in spring (February) and autumn (October).Seven fertilization treatments—N,P,K single application and NP,NK,PK,NPK combined application were set up,and no fertilization was taken as the blank control.The effects of different fertilization treatments on the growth and photosynthesis of container seedlings of T.odorum were comprehensively evaluated by measuring the growth,photosynthetic characteristics,and leaf nutrients of the seedlings.The results showed that the effect of combined fertilization was significantly better than that of single application.In spring when T.odorum seedlings grew rapidly,the NK treatment performed best,with the highest quality index (QI) value and biomass,and it significantly increased the net photosynthetic rate (Pn),stomatal conductance (Gs),transpiration rate (Tr),and chlorophyll content (by 116.19% compared with the control).In autumn when T.odorum mainly reserved nutrients,the NP treatment had the highest lignin content,with the cellulose content,whole plant biomass,QI value,Pn,Gs,Tr,and leaf total phosphorus content only secondary to those of the NK treatment.Correlation analysis showed that the total nitrogen content of leaves had significantly positive correlations with chlorophyll and cellulose content,being the key to driving the improvement of photosynthetic capacity.In terms of the comprehensive score of principal components,the NK and NP treatments ranked the first in spring and autumn,respectively.The responses of growth and photosynthetic characteristics of container seedlings of T.odorum to fertilization system had significant seasonal specificity.It is recommended that the differentiated fertilization strategy of NK in spring and NP in autumn should be adopted to effectively promote vegetative growth and photosynthetic performance,which provides a solid theoretical support and an application path for the efficient cultivation of high-quality seedlings of rare and endangered tree species. |
| Key words: Tsoongiodendron odorum fertilization season nitrogen phosphorus potassium seedling growth photosynthetic capacity |
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