毛竹克隆构型及其生物量对不同营林模式的响应

朱强根; 金爱武; 陈操; 王意锟; 黄海泳

doi:10.3969/j.issn.1000-2006.2015.01.014

朱强根,金爱武,陈操,王意锟,黄海泳

南京林业大学学报（自然科学版） ›› 2015, Vol. 39 ›› Issue (01) : 73-78.

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南京林业大学学报（自然科学版） ›› 2015, Vol. 39 ›› Issue (01) : 73-78. DOI: 10.3969/j.issn.1000-2006.2015.01.014

研究论文

毛竹克隆构型及其生物量对不同营林模式的响应

朱强根¹,金爱武^1*,陈操²,王意锟¹,黄海泳³

作者信息 +

The clonal architecture and biomass of Phyllostachys edulisas affected by different management modes

ZHU Qianggen¹, JIN Aiwu^1*, CHEN Cao², WANG Yikun¹, HUANG Haiyong³

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文章历史 +

摘要

克隆植物构型不仅受植物本身生物学的限制,对不同环境条件或干扰作用也会产生形态可塑性反应。笔者调查了不同营林模式下毛竹根茎克隆构型(分枝强度、分枝角度、根茎长度、节间长、根茎直径和节数等)的可塑性响应,同时对地下根茎和地上分株生物量的分配进行了分析。结果表明:在不同营林模式下,根茎的分枝强度与裂断数量均表现为笋用毛竹林>笋材两用林>材用林,根茎裂断显著增加了毛竹地下根茎分枝强度(P<0.05); 根茎分枝角度在不同营林模式下存在频率分布上的差异,毛竹通过改变分枝角度对土壤的异质状况产生可塑性适应。连续施肥12～14 a的笋用林和笋材两用林的根茎总长度较施肥1 a材用林的分别增长了11.09%和15.78%; 根茎节间长和直径的表现与不同营林模式下的养分状况、土壤异质性或根茎裂断情况不一致,而与地上分株胸径之间存在显著的异速生长关系。养分较贫瘠(施肥1 a)的材用毛竹林相对有更多的生物量分配到地下根茎,而连续施肥显著增加了笋用林和笋材两用林地上竹笋(新分株)生物量的比例。

Abstract

Clonal plant architecture depends on species-specific constraints, but also respond of morphological plasticity to extrinsic environmental factors or disturbance. This was well investigated in clonal grass, but little was known in giant clone specie such as Phyllostachys edulis. Our objectives were to study the effects of different management modes on clonal architecture of Ph. edulis, and ramets and rhizome biomass were also discussed. Three management modes were chosen to investigate clonal rhizome fragments and architectural traits such as length of rhizome or internodes, branching intensity or angles, number of nodes and rhizome diameter. These modes had differences in level of rhizome severing(rhizome severing or rhizome severing terminals)and fertilization and soil heterogeneity, and represented shoot(new ramet)food harvesting mode(SFH), stem harvesting mode(SH)and mixed mode with the two types(MM)by main use of forest land, respectively. Biomasses allocated to ramets or rhizomes were also investigated in three management modes. Results showed that branching intensity of rhizome significantly differed in different management modes(P<0.05), as indicated SFH>MM>SH, which was consistent with high, middle and low level of rhizome severing. The distribution percentages of branching angles were different among three modes, which indicated that Ph. edulis plastically responded to soil heterogeneity by changing branching angle. Continuous fertilization application(12-14 years)increased by 11.09% and 15.78% of total rhizome length respectively, when comparing SFH and MM to SH. The length of internodes and rhizome diameter were both not consistent with the change of rhizome severing and fertilization and soil heterogeneity in different management modes.However, significantly allometric functions were met by relating length of internodes or rhizome diameter to ramets diameter at breast height. More biomass was relatively allocated to the underground(such as rhizome)for SH which had one year fertilization, but this was adverse for SFH or MM that had long time fertilization(12-14 years).

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朱强根,金爱武,陈操,王意锟,黄海泳. 毛竹克隆构型及其生物量对不同营林模式的响应[J]. 南京林业大学学报（自然科学版）. 2015, 39(01): 73-78 https://doi.org/10.3969/j.issn.1000-2006.2015.01.014

ZHU Qianggen, JIN Aiwu, CHEN Cao, WANG Yikun, HUANG Haiyong. The clonal architecture and biomass of Phyllostachys edulisas affected by different management modes[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2015, 39(01): 73-78 https://doi.org/10.3969/j.issn.1000-2006.2015.01.014

中图分类号： S718

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基金

收稿日期:2014-01-10 修回日期:2014-04-10
基金项目:中央财政林业科技推广项目(2009TS001); 丽水市公益性技术应用项目(2013ZC001,2013JYZB09)
第一作者:朱强根,讲师,博士。*通信作者:金爱武,研究员。E-mail: kinaw@zafu.edu.cn。
引文格式:朱强根,金爱武,陈操,等. 毛竹克隆构型及其生物量对不同营林模式的响应[J]. 南京林业大学学报:自然科学版,2015,39(1):73-78.