干旱区生态环境知识资源中心(Arid): 树干空洞对胡杨长势与心边材特征的影响

Arid

	树干空洞对胡杨长势与心边材特征的影响
其他题名	The influence of trunk cavity on tree vitality and heartwood /sapwood characteristics of Populus euphratica Oliv
	热依拉·木民; 玉米提·哈力克; 塔依尔江·艾山; 崔宝凯
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2021
卷号	40 期号:10 页码:3070-3077
中文摘要	胡杨(Populus euphratica)是我国西北干旱区荒漠河岸林优势建群种,对于维持区域生态系统稳定性有着不可替代的作用。在恶劣的自然环境和人为干扰下,胡杨林遭受破坏,退化严重,树干空穴化较为突出,对胡杨的长势、健康和生存产生极大威胁。本研究在塔里木河下游阿拉干断面胡杨林设置监测样地,通过野外采样和室内测定,并运用两独立样本差异显著性检验,分析空心与未空心胡杨在长势、心-边材含水率和密度的差异,试图探明树干空心对胡杨树体的影响。结果表明:树干空心对胡杨树高的负面影响显著,并且造成树冠疏失度的增高(P<0.05),而对冠宽度、冠高比、冠幅面积、偏冠率等长势特征并未造成显著影响(P>0.05) 。当胸径(DBH)为25~35 cm、35 ~ 45 cm时,空心胡杨心材生材含水率(243.9%)显著高于未空心胡杨心材(170.5%);当DBH>25 cm时,空心胡杨心材气干含水率(7.3%)显著低于未空心胡杨心材(11.1%);空心胡杨边材的生材含水率和气干含水率均低于未空心胡杨(P<0.05),但DBH为35~45 cm时,其差异不显著(P>0.05) 。空心胡杨心材生材密度、气干密度、全干密度和基本密度均显著小于未空心胡杨(P<0.05) 。当DBH>25 cm时,空心胡杨边材的各项密度均小于未空心胡杨(P<0.05) 。可知,树干空心在一定程度上会限制树高生长,造成树冠衰退,致使心-边材密度下降。本研究结果不仅有助于了解树干空心对树木健康造成的风险,同时可为胡杨林资源保育和管理提供一定的参考。
英文摘要	Populus euphratica is a dominant tree species of desert riparian forest in the arid region of northwest China,which plays an irreplaceable role in maintaining the stability of regional fragile ecosystem. P. euphratica forest has been damaged and severely degraded due to the harsh natural environment and human disturbance. Trunk hollow is extremely prominent,posing a great threat to its vitality,health,and survival. We set up a monitoring plot in P. euphratica forest in the Argan section along the lower Tarim River. By field sampling and laboratory measurement,we compared the growth,heartwood/sapwood water content,and wood density of hollow and nonhollow trees by testing the differences between two independent samples. The results showed that hollow trunk had significant negative impacts on tree height of P. euphratica,and increased crown loss (P<0.05),but did not affect crown width,crown/height ratio,crown area and crown deviation rate (P>0.05). Water content (243.9%) of heartwood of hollow trees with DBH of 25-35 cm and 35-45 cm was significantly higher than that of non-hollow trees (170.5%). The air-dry water content (7.3%) of heartwood of hollow trees with DBH >25 cm was significantly lower than that of non-hollow trees (11.1%). Water content and air-dry water content of sapwood of hollow trees were lower than those of non-hollow trees (P<0.05),but the difference was not significant at DBH of 35-45 cm (P>0.05). Wood density,air-dry density,total dry density and basic density of heartwood of hollow trees were significantly lower than those of non-hollow trees (P<0.05). When DBH was at >25 cm,the four density indices of sapwood of hollow trees were lower than that of non-hollow trees (P<0.05). Therefore,trunk hollow may restrict the growth of tree height to a certain extent,resulting in decline of tree crown and heartwood/sapwood density. The results improve our understanding of the risk of trunk hollow on tree health and provide reference for the conservation and management of P. euphratica forest resources.
中文关键词	河岸林 ; 胡杨 ; 空心树 ; 心-边材含水率 ; 心-边材密度
英文关键词	riparian forest Populus euphratica hollow tree heartwood /sapwood water content heart-sapwood density
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Forestry
CSCD记录号	CSCD:7066823
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377874
作者单位	热依拉·木民, 新疆大学资源与环境科学学院;;北京林业大学生态与自然保护学院微生物研究所, 新疆维吾尔自治区绿洲生态教育部重点实验室;;, 乌鲁木齐;;, ;;北京 830046;;100083.; 玉米提·哈力克, 新疆大学资源与环境科学学院, 新疆维吾尔自治区绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国.; 塔依尔江·艾山, 新疆大学资源与环境科学学院, 新疆维吾尔自治区绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国.; 崔宝凯, 北京林业大学生态与自然保护学院微生物研究所, 北京 100083, 中国.
推荐引用方式 GB/T 7714	热依拉·木民,玉米提·哈力克,塔依尔江·艾山,等. 树干空洞对胡杨长势与心边材特征的影响[J],2021,40(10):3070-3077.
APA	热依拉·木民,玉米提·哈力克,塔依尔江·艾山,&崔宝凯.(2021).树干空洞对胡杨长势与心边材特征的影响.生态学杂志,40(10),3070-3077.
MLA	热依拉·木民,et al."树干空洞对胡杨长势与心边材特征的影响".生态学杂志 40.10(2021):3070-3077.