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关于可塑性论文范文资料 与不同林下生境闽楠生长影响表型可塑性有关论文参考文献

版权:原创标记原创 主题:可塑性范文 科目:发表论文 2024-03-30

《不同林下生境闽楠生长影响表型可塑性》:本文关于可塑性论文范文,可以做为相关论文参考文献,与写作提纲思路参考。

摘 要:为合理配置林下闽楠更新层,在福建明溪对不同林下生境10年生闽楠的生长表现及表型可塑性进行研究.结果表明:(1)林下生境对10年生闽楠的生长有着显著性影响,在促进闽楠生长方面,林隙>林冠下,林下生境的选择和配置是林下闽楠人工林培育关键措施;(2)林下生境对闽楠植株形态有着显著性影响,表现出强烈的表型可塑性.林隙生境对闽楠的冠长及树冠率影响明显大于林冠下;(3)林下生境未显著改良闽楠的树干生物量分配比、树根生物量分配比及冠根比;但林隙生境的皮、枝、叶生物量分配比显著高于林冠下生境,有着强烈的表型可塑性.表明在适合闽楠生长的林隙生境下,闽楠通过增加皮、枝、叶生物量分配比,采取快速的资源获取而促进生长的策略;在不适宜生境时则通过减少枝、叶生物量分配比,采取保守生存策略,进行缓慢的资源获取和消耗策略.

关键词:闽楠;林下生境;生长;表型可塑性;生物量分配比;林隙

中图分类号:S718.51,S725.7,S792.24 文献标志码:A 论文编号:2014-0579

Abstract: In order to rationally configure Phoebe bournei updated layer, a research on the growth influence and the phenotypic plasticity of 10-years-old of P. bournei with different habitats was conducted in Mingxi Fujian. The results showed that: (1) understory habitats had a significant impact on the growth of 10-year-old P. bournei plantations, and the sequence of promoting growth of P. bournei plantations from high to low was canopy gap and understory; understory habitat selection and configuration was a key measure of understory P. bournei plantations; (2) understory habitats had a very significant impact on the plant morphology, showed a strong phenotypic plasticity, crown length and the crown rate of P. bournei in canopy gap were significantly greater than those in the understory habitats; (3) understory habitats didn’t bring significant change to stem biomass allocation, root biomass allocation and crown-root ratio; branch biomass allocation and leaf biomass allocation of Phoebe bournei in canopy gap were significantly higher than those in understory habitat, showed a strong phenotypic plasticity. In the appropriate understory habitats, P. bournei plantations had rapid resource acquisition, including increased leaf and branch biomass allocation ratio. Otherwise, P. bournei plantations adopted conservative consumed strategies by reducing leaf and branch biomass allocation ratio.

Key words: Phoebe bournei; Understory Habitats; Growth; Phenotypic Plasticity; Biomass Allocation; Canopy Gap

0 引言

闽楠(Phoebe bournei)作为中国南方主要造林珍贵树种[1],是针叶林下更新的理想树种之一[2].针对其祼地造林成效差、培育周期长等问题以及针叶林分结构简单、生态功能低下等现实,为此,课题组尝试采用人为措施,在针叶林下进行闽楠更新培育,期间形成针叶树-闽楠复层林分结构,达到修复生态功能和缩短培育周期的目标.当前有关闽楠研究大多围绕种苗繁育[3-5]、遗传育种[6-8]、光环境影响[9]等方面进行.有关闽楠针叶林下更新培育方面的研究较少[10-12],且在林下生境对其生长的影响以及表型可塑性方面的研究尚属空白.林隙和林冠下等林下生境类型普遍存在针叶林内的.不同林下生境在光照、水分以及养分条件有着明显差异,生境的异质性必然导致生长在那里树木的差异.如何合理选择、创建和维护理想林下生境对于林下更新层培育显得十分必要和重要,往往直接关系到林下更新培育效果和成败.不同树种因其生物学、生态学特性的差异,对理想生境的要求不同,对生境的响应机制和变化亦不尽相同.进行闽楠不同林下生境生长影响及表型可塑性的研究,探明其规律,对于指导闽楠在林下更新培育有着重要意义.本研究在福建明溪,选择林隙、林冠下等2种林下生境,研究分析其对10年生闽楠生长影响及表型可塑性,进而为合理林下生境创建、维护和配置等提供科学依据,旨在为闽楠在林下更新培育提供技术支持.

可塑性论文参考资料:

结论:不同林下生境闽楠生长影响表型可塑性为关于对写作可塑性论文范文与课题研究的大学硕士、相关本科毕业论文可塑性强的人的表现论文开题报告范文和相关文献综述及职称论文参考文献资料下载有帮助。

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