带状采伐宽度对毛竹林地下竹鞭结构特征的影响_蔡宗明.pdf
《带状采伐宽度对毛竹林地下竹鞭结构特征的影响_蔡宗明.pdf》由会员分享,可在线阅读,更多相关《带状采伐宽度对毛竹林地下竹鞭结构特征的影响_蔡宗明.pdf(9页珍藏版)》请在咨信网上搜索。
1、doi:10.11707/j.1001-7488.LYKX20210803带状采伐宽度对毛竹林地下竹鞭结构特征的影响*蔡宗明1邓智文1李秉钧1李士坤2温伟庆2荣俊冬1郑郁善1陈礼光1(1.福建农林大学林学院福州 350002;2.漳平市林业局龙岩 361000)摘要:【目的】研究不同宽度带状采伐下毛竹地下竹鞭结构和数量特征的差异,旨在探究毛竹鞭根生长对带状采伐的适应机制,为毛竹林经营提供理论参考。【方法】选择立地条件和竹龄结构一致、坡向相同的毛竹纯林,在 2016年 11 月进行带状采伐,采伐带宽分别为 6、8、10 m,设置 3 种采伐带宽的长度为 30 m 的采伐带样地,并在采伐带样地之间
2、设置同样标准的保留带;在 2019 年 10 月对不同宽度采伐带和保留带样地的竹鞭生长指标进行调查分析,测定不同土层、不同鞭龄的竹鞭的总鞭长、鞭节数、平均鞭径、平均节间长、鞭干质量等指标,分析其对不同采伐带宽的响应差异。【结果】1)在 8 m 采伐带的竹鞭的总鞭长和鞭干质量显著高于 6 m 采伐带(P0.05),但与 10 m 采伐带差异不显著;8 m采伐带的平均鞭径显著低于 10 m 采伐带(P0.05),但与 6 m 采伐带的差异不显著;8 m 采伐带的鞭节数显著高于 6 m和 10 m 采伐带(P0.05);3 种宽度采伐带之间的竹鞭平均节间长无显著差异,但随带宽增加表现出降低趋势。相比
3、于保留带,3 种宽度采伐带的竹鞭总鞭长、鞭节数和鞭干质量均呈增加趋势。2)与保留带相比,各竹鞭年龄阶段的结构特征在不同宽度采伐带间表现出变幅差异。在幼龄鞭段,8 m 带宽采伐带的总鞭长、平均节间长和鞭干质量的增幅分别达到 49.20%、45.48%、58.38%;在壮龄鞭段,6 m 和 8 m 采伐带的总鞭长、鞭节数和鞭干质量显著增加(P0.05);在老龄鞭段,6、8 m 采伐带的竹鞭总鞭长、鞭节数和鞭干质量均出现降低,10 m 采伐带则相反。3)在 0 20 和 20 40 cm 土层,8 m 和 10 m 采伐带的鞭节数和鞭干质量较保留带均显著增加(P0.05),其中 020 cm 土层中
4、 8 m 带宽的总鞭长、鞭节数和鞭干质量较保留带的增幅达 80.83%、87.50%和 45.27%,10 m 带宽的平均鞭径和平均节间长较保留带减少了 7.25%和 5.34%。在 20 40 cm 土层中,8 m 采伐带中竹鞭的 5 项指标相较于保留带均有所增加,尤其是总鞭长、鞭节数和鞭干质量的增量达显著性水平。4)采伐带的总鞭芽数量特征总体优于保留带,其中 8 m 采伐带的总鞭芽数显著高于 6 m 和10 m 采伐带(P0.05),3 种带宽之间的保留带总鞭芽数无显著差异;不同宽度带状采伐的竹鞭的弱芽比例均高于壮芽比例,8 m 采伐带的壮芽比例最高(33.75%),6 m 采伐带的空芽节
5、比例最高(18.26%)。【结论】在本研究中,8 m 带宽处理的毛竹林的竹鞭各指标总体优于 6 m 和 10 m 带宽,因此建议毛竹林的机械化经营可考虑采用 8 m 采伐带宽。合理的采伐带宽能够促进毛竹林竹鞭的延伸和扩展,并可能会进一步地改善毛竹林的笋、材产量和质量以及经营效益,也能为将来的机械化经营提供采伐带宽参考。关键词:毛竹;带状采伐;竹鞭;数量特征中图分类号:S718.43文献标识码:A文章编号:10017488(2023)04007909Effects of Strip-cutting Width on the Structural Characteristics of Underg
6、round BambooRhizome in Moso Bamboo ForestsCai Zongming1Deng Zhiwen1Li Bingjun1Li Shikun2Wen Weiqing2Rong Jundong1Zheng Yushan1Chen Liguang1(1.College of Forestry,Fujian Agriculture and Forestry UniversityFuzhou 350002;2.Zhangping Forestry BureauLongyan 361000)Abstract:【Objective】In this study,the ef
7、fect of strip cutting with different widths on the structural characteristics ofunderground rhizomes of Phyllostachys edulis was investigated,in order to explore the adaptation mechanism of undergroundrhizome system of P.edulis to strip cutting with different widths,and provide a theoretical basis f
8、or the scientific management of P.edulisforests.【Method】A pure bamboo forest with the same site conditions,bamboo age structure,and slope aspect was targeted,andstrip cuttings were conducted with three different strip widths,6 m,8 m,and 10 m,and a strip length of 30 m.The same standardreserved bands
9、 between the cutting strips were set.In October 2019,the bamboo rhizome characteristics in the different width 收稿日期:20211026;修回日期:20230306。基金项目:“十三五”国家重点研发计划(2016YFD0600902);福建农林大学科技创新专项基金(CXZX2016070);福建省科技创新团队“环境友好型竹资源精准培育与利用”项目(闽教科 201849 号)。*陈礼光为通讯作者。第 59 卷 第 4 期林业科学 Vol.59,No.42 0 2 3 年 4 月SCIE
10、NTIA SILVAE SINICAEApr.,2 0 2 3cutting bands and reserved bands were investigated.The total rhizome length,rhizome node number,average rhizome diameter,average internode length,rhizome dry weight and other indicators in different soil layers and different rhizome age were measured,and the indicators
11、 were used for analysis of their response differences to different logging bandwidths.【Result】1)The totallength and dry weight of bamboo rhizome in 8 m cutting band were significantly greater than those in 6 m cutting band(P 0.05),but had no significant difference with those in 10 m cutting band.The
12、 average rhizome diameter of 8 m cutting band wassignificantly smaller than that of 10 m cutting band(P 0.05),but not significantly different from that of 6 m cutting band.Thenumber of rhizome nodes in 8 m cutting band was significantly greater than that in 6 m and 10 m cutting bands(P 0.05).Therewa
13、s no significant difference in the average internode length of bamboo rhizome among the three width cutting bands,but thelength showed a decreasing trend with the increase of bandwidth.Compared with the reserved strip,the total rhizome length,rhizome node number and rhizome dry weight of three kinds
14、 of cutting strips showed an increasing trend.2)Compared with theretention zone,the structural characteristics of the each rhizome age stage showed different amplitudes of variation amongdifferent width cutting zones.In the young rhizome section,the total rhizome length,average internode length and
15、rhizome dryweight in the 8 m bandwidth harvesting band increased by 49.20%,45.48%and 58.38%,respectively.In the middle-aged rhizomesection,the total rhizome length,rhizome number and rhizome dry weight in 6 m and 8 m cutting bands increased significantly(P 0.05).In the old rhizome section,the total
16、rhizome length,rhizome node number and rhizome dry weight of bamboo rhizomes in the 6 m and 8 m cutting bands decreased,while those in the 10 m cutting band was the opposite.3)In 020 and 2040 cm soil layers,the number and dry weight of rhizomes in 8 m and 10 m cutting bands were significantly greate
17、r than those inreserved bands(P 0.05).In 020 cm soil layer,the total rhizome length,number and dry weight of rhizomes in 8 m cutting bandwere 80.83%,87.50%and 45.27%greater than those in reserved band,and the average rhizome diameter and average internodelength in 10 m cutting band were 7.25%and 5.3
18、4%smaller than those in reserved band.In 2040 cm soil layer,the five indexes ofbamboo rhizome in 8 m cutting band were greater than those in retaining band,especially the increments of total rhizome length,rhizome node number and rhizome dry weight were significant.4)The total number of rhizome buds
19、 in the cutting zone wasgenerally more than that in the retention zone.The total number of rhizome buds in the 8 m cutting zone was significantly greaterthan that in the 6 m and 10 m cutting zones(P 0.05).There was no significant difference in the total number of rhizome buds inthe retention zones b
20、etween the three different bandwidths.The proportion of weak buds of bamboo rhizomes harvested in differentwidths was higher than that of strong buds.The proportion of strong buds in 8 m cutting band was the highest(33.75%),and theproportion of empty buds in 6 m cutting band was the highest(18.26%).
21、【Conclusion】Reasonable cutting bandwidth can promotethe extension and expansion of underground bamboo rhizome,further affect the yield and quality of bamboo shoots and timber,improve the economic benefits of bamboo forest management,and also provide effective solutions for the future mechanizedmanag
22、ement of bamboo forests.In this study,the indexes of bamboo rhizome with 8 m band width are better than those with 6 mand 10 m band width.Therefore,8 m band width can be used as a reference for future mechanized management of bamboo forest.Key words:moso bamboo;strip clearcutting;bamboo rhizome;quan
23、titative characteristics 毛竹(Phyllostachys edulis)是禾本科(Poaceae)竹亚科(Bambusoideae)刚竹属(Phyllostachys)的一种单轴散生竹种,具有重要的经济、生态和社会价值(江泽慧,2002;周燕等,2018)。在毛竹林经营中,通常都是采用人工择伐,我国有丰富的竹资源,但是受到地形和地貌的限制,农业劳动力日益短缺导致劳动力成本上升,竹林资源很难被有效利用(孙正军等,2019),在很多地区出现了无人经营或不采伐的现象,使我国竹产业空有“宝山”(曾宪礼,2019),未来机械化经营可能是解决这一问题的有效途径。探索一种能够突破传
24、统模式,解决低效、成本高等问题的新的竹林采伐模式-,有助于实现毛竹产业转型升级(张洋洋等,2020)。带状采伐是按一定宽度、一定面积对毛竹林实施条带状皆伐(曾宪礼等,2019),该采伐方式可能会影响毛竹地下竹鞭系统的生长发育以及地下鞭根的养分运输,采伐强度较低可能无法达到预期结果,采伐强度过高则不利于毛竹林恢复。毛竹地下竹鞭系统在毛竹生态系统中扮演着重要角色,它可在毛竹生长发育过程中获取水分和营养,也是支撑和固定立竹的重要器官(熊雨露等,2020),地下竹鞭的长度、鞭龄结构和壮芽的数量对笋、材的产量和质量影响甚大(刘力等,2004)。目前,关于毛竹地下系统的研究主要集中在鞭根养分含量(Preg
25、itzer et al.,2002)、生物量(Kubisch et al.,2015)、竹鞭生长特性(Wang et al.,2016,80林业科学59 卷 江国华等,2017)、竹鞭分布等(Sun et al.,2016),而关于带状采伐下的毛竹地下竹鞭结构特征的研究较少。鉴于此,本文研究带状采伐宽度对毛竹林地下竹鞭结构特征的影响,设置了 6、8、10 m 3 种采伐带宽,对比各处理的地下竹鞭的数量变化,分析地下竹鞭对带状采伐的适应方式,对提高竹材产量和竹笋产量有着重要意义,可为毛竹林培育提供科学依据。1研究区概况试 验 地 选 择 在 福 建 省 漳 平 市 永 福 镇 大 阪 村(117
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 带状 采伐 宽度 毛竹 林地 竹鞭 结构 特征 影响 蔡宗明
1、咨信平台为文档C2C交易模式,即用户上传的文档直接被用户下载,收益归上传人(含作者)所有;本站仅是提供信息存储空间和展示预览,仅对用户上传内容的表现方式做保护处理,对上载内容不做任何修改或编辑。所展示的作品文档包括内容和图片全部来源于网络用户和作者上传投稿,我们不确定上传用户享有完全著作权,根据《信息网络传播权保护条例》,如果侵犯了您的版权、权益或隐私,请联系我们,核实后会尽快下架及时删除,并可随时和客服了解处理情况,尊重保护知识产权我们共同努力。
2、文档的总页数、文档格式和文档大小以系统显示为准(内容中显示的页数不一定正确),网站客服只以系统显示的页数、文件格式、文档大小作为仲裁依据,平台无法对文档的真实性、完整性、权威性、准确性、专业性及其观点立场做任何保证或承诺,下载前须认真查看,确认无误后再购买,务必慎重购买;若有违法违纪将进行移交司法处理,若涉侵权平台将进行基本处罚并下架。
3、本站所有内容均由用户上传,付费前请自行鉴别,如您付费,意味着您已接受本站规则且自行承担风险,本站不进行额外附加服务,虚拟产品一经售出概不退款(未进行购买下载可退充值款),文档一经付费(服务费)、不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
4、如你看到网页展示的文档有www.zixin.com.cn水印,是因预览和防盗链等技术需要对页面进行转换压缩成图而已,我们并不对上传的文档进行任何编辑或修改,文档下载后都不会有水印标识(原文档上传前个别存留的除外),下载后原文更清晰;试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓;PPT和DOC文档可被视为“模板”,允许上传人保留章节、目录结构的情况下删减部份的内容;PDF文档不管是原文档转换或图片扫描而得,本站不作要求视为允许,下载前自行私信或留言给上传者【自信****多点】。
5、本文档所展示的图片、画像、字体、音乐的版权可能需版权方额外授权,请谨慎使用;网站提供的党政主题相关内容(国旗、国徽、党徽--等)目的在于配合国家政策宣传,仅限个人学习分享使用,禁止用于任何广告和商用目的。
6、文档遇到问题,请及时私信或留言给本站上传会员【自信****多点】,需本站解决可联系【 微信客服】、【 QQ客服】,若有其他问题请点击或扫码反馈【 服务填表】;文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“【 版权申诉】”(推荐),意见反馈和侵权处理邮箱:1219186828@qq.com;也可以拔打客服电话:4008-655-100;投诉/维权电话:4009-655-100。