树体管理对落叶松种子园母树生理特性的影响

打开文本图片集

中图分类号：s725 文献标识码：A DOI： 10.7525/j.issn.1006-8023.2025.06.008

The Influence ofTree Management on the Physiological CharacteristicsofMotherTreesinLarchSeed Orchard

BU Pengtu 1，2 ，FENG Jian 1，2* ，YANG Yuanyuan1'²， SUN Lijuan³，LI Guang

LiaoningAcademyofForestrySience，Shenyang32，China；2.LiaoningBaishilaziForestEcosystemNationalResearchta

tion，Dandong1182O1，China；3.DaGuJiaForestFarm，State-ownedQingyuan ManchuAutonomous CountyFushun11300， China;4.Qing Liang Shan ForestFarm，State-owned Xiuyan Manchu Autonomous County，Anshan 114312，China）

Abstract：Larch isanimportantplantationtreespecies innorthern China.Inorder torevealthephysiologicaleffectsof tree managementon the mother tree oflarch，the mother tree of the second generation seed orchardof larch was used as the research object in this study.The physiological indexes such as endogenous hormones，nutrients，oxidase，MDA and free proline inthe fruiting branches ofthe mother treeoflarch were determinedandanalyzed by means oftrunk truncation，puling branches and trunk truncation+puling branches.The results showed that the contents of IAA， GA3 and ZT were increased，，while the content of ABA was decreased.Especially for the treatment combining trunk truncation + pulling branches（TT + PB），the contents of IAA， GA3 and ZT in TT+PB were 107.80%，108.61% and 107.29% of CK，respectively.Interms of endogenous hormone ratio，tree management increased the ratioofIAA/ABA，GA/ABA， ZT/ABA，GA3/IAA，ZT/IAA and ZT/GA 3 .Tree management increased the contents of soluble protein，starch and soluble sugar in the fruiting branches of larch mother tree，especially trunk truncation + pulling branches（TT + PB）， whose contents of soluble protein，starch and soluble sugar were 103.09% ，115.99% and 104.40% of CK. The activity of SOD and POD was improved by tree management，and the resistance oflarch mother tree was improved.In summary， tree managementtechnologyprovidessuffcient material substrateforimprovingseed yieldandqualityof larchmother tree.This study provided theoretical support for high and stable yield of larch seed orchard. Keywords：Larch；pulling branches；trunk truncation；hormone

0 引言

树体管理是林木种子园经营管理中常采用的一项技术[1-2]，通过控制树体高度、调整枝条角度和疏除多余枝条等技术措施促使林木种子园母树形成合理的冠形，进而促进种子园母树产种量的增加和种子质量的提升。（剩余13601字）