毛竹和高节竹相互侵入后林分地下鞭根系统竞争效应

生态学杂志

毛竹和高节竹相互侵入后林分地下鞭根系统竞争效应

郭子武¹,陈双林^1*,江志标²,杨清平¹,李明良²,胡俊靖^3#br#

(¹中国林业科学研究院亚热带林业研究所，杭州 311400； ²浙江省桐庐县林业技术推广中心站，浙江桐庐 311500； ³杭州市林业科学研究院，杭州 310016)

出版日期:2016-10-10 发布日期:2016-10-10

Rhizome and root competitive effects of bamboo in Phyllostachys edulis and Ph. prominens mixed forest.

GUO Zi-wu¹, CHEN Shuang-lin^1*, JIANG Zhi-biao², YANG Qing-ping¹, LI Ming-liang², HU Jun-jing^3#br#

(¹Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China; ^2Forestry Technology Extension Station of Tonglu County, Tonglu 311500, Zhejiang, China; ^3Hangzhou Academy of Forestry, Hangzhou 310016, China).

Online:2016-10-10 Published:2016-10-10

摘要/Abstract

摘要：

在毛竹和高节竹分布的界面区，由于相互侵入，常形成混交竹林，为比较毛竹、高节竹地下鞭根系统的可塑性和竞争能力，调查分析了毛竹、高节竹纯林及其混交林地下鞭根系统的形态结构特征和生物量分配规律。结果表明：高节竹鞭径、鞭节长、比根长、根长密度、根表面积密度、根体积密度和鞭生物量、根生物量、鞭根总生物量均显著低于毛竹，而比鞭长、鞭长密度和鞭节密度则相反，根径、分形维数差异不显著。高节竹与毛竹混交，会引起二竹种地下鞭根系统形态特征和生物量分配的明显变化，毛竹鞭径、鞭节长和高节竹鞭节长显著提高，毛竹鞭长密度、鞭节密度、比鞭长和高节竹鞭长密度、鞭节密度显著降低；毛竹、高节竹根长密度、表面积密度、体积密度、鞭生物量、根生物量、鞭根总生物量和根生物量比例显著下降，比根长和鞭生物量比例显著升高。毛竹、高节竹鞭根系统相对产量显著小于1，竞争平衡指数(高节竹/毛竹)显著小于0，且鞭根竞争平衡指数显著高于竹鞭。研究表明，毛竹比高节竹具有更高的地下鞭根系统可塑性，两竹种间存在激烈的种间竞争，毛竹竞争能力明显强于高节竹，鞭根在地下系统竞争中占主导作用。

关键词: 种源, 叶片化学计量特征, 麻栎, 变异

Abstract: Mixed forests of Phyllostachys edulis and Phyllostachys prominens are developing due to their mutual invasion in the adjacent distribution regions of these two bamboo species. To compare the plasticity and competition of Ph. edulis and Ph. prominens, a field experiment was conducted to explore the adaptive features of rhizome and roots of Ph. edulis and Ph. prominens in the pure and mixed forests. The results showed that rhizome diameter and node length, specific root length, densities of root length, surface area and volume, rhizome biomass, root biomass and total rhizome and root biomass of Ph. prominens were all lower than those of Ph. edulis, while an opposite pattern was found for the specific rhizome length, and densities of rhizome length and rhizome node. No differences in root diameter and fractal dimension between the two bamboos were found. Morphological character and biomass allocation for rhizomeroot system of Ph. edulis and Ph. Prominens changed after mutual invasion. Rhizome diameter of Ph. edulis and rhizome node length of the two bamboos increased, but densities of rhizome length and node of the two bamboos, specific rhizome length of Ph. edulis all decreased remarkably. Density of root length, surface area and volume, biomass of rhizome, root and total rhizome and root biomass of Ph. edulis and Ph. Prominens all decreased greatly, while specific root length and allocation proportion of rhizome for the two bamboos increased obviously. The relative yield for the two bamboos was significantly less than 1, and competitive balance index (Ph. prominens/Ph. edulis) was less than 0. Furthermore, the competitive balance index of rhizome and root was significantly higher than that of rhizome. All those results indicated that rhizomeroot system of Ph. edulis was more plastic than that of Ph. prominens. There was intense interspecific competition among the two bamboos in the mixed forest, and Ph. edulis was more competitive than Ph. prominens, and rhizome root system played a leading role in competition between Ph. edulis and Ph. prominens.

Key words: leaf stoichiometry, Quercus acutissima., provenance, variation

郭子武1,陈双林1*,江志标2,杨清平1,李明良2,胡俊靖3. 毛竹和高节竹相互侵入后林分地下鞭根系统竞争效应[J]. 生态学杂志.

GUO Zi-wu1, CHEN Shuang-lin1*, JIANG Zhi-biao2, YANG Qing-ping1, LI Ming-liang2, HU Jun-jing3. Rhizome and root competitive effects of bamboo in Phyllostachys edulis and Ph. prominens mixed forest.[J]. cje.

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