文献类型：期刊文献

中文题名：乌兰布和沙漠不同平茬强度梭梭叶功能性状

英文题名：Study on functional traits of Haloxylon ammodendron leaves with different stubble strength in Ulanbuhe desert

作者：郝需婷[1,2,3] 黄雅茹[1,2] 崔健[1,2] 张帅[1] 刘亚楠[1] 郑东升[1] 郝惠忠[4] 李雪明[1] 马迎宾[1,2,3]

第一作者：郝需婷

机构：[1]中国林业科学研究院沙漠林业实验中心,内蒙古巴彦淖尔015200;[2]国家林业草原防沙治沙工程技术研究中心,内蒙古巴彦淖尔015200;[3]内蒙古磴口荒漠生态系统国家定位观测研究站,内蒙古巴彦淖尔015200;[4]内蒙古河套灌区水利发展中心乌拉特分中心长济渠供水所,内蒙古巴彦淖尔014400

年份：2024

卷号：44

期号：11

起止页码：29-39

中文期刊名：中南林业科技大学学报

外文期刊名：Journal of Central South University of Forestry & Technology

收录：CSTPCD;;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：国家自然科学基金项目(32001374);内蒙古自治区自然科学基金项目(2023QN03008);中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2021MA005)。

语种：中文

中文关键词：梭梭;乌兰布和沙漠;平茬;叶功能性状

外文关键词：Haloxylon ammodendron;Ulanbuhe desert;stubble;leaf functional traits

分类号：S718.3

摘要：【目的】为揭示梭梭在不同平茬强度下叶片对环境的适应策略,并为更好地抚育退化人工梭梭林提供科学依据。【方法】以乌兰布和沙漠东北缘附近20年生人工梭梭林为研究对象,按不同比例平茬后测定叶片功能性状共9个指标,探讨平茬对梭梭叶功能性状的影响,并分析平茬后不同生长时期之间的差异性,旨在揭示梭梭平茬后对干旱荒漠环境的适应策略。【结果】不同比例平茬梭梭均出现不同程度的补偿性生长,留茬0%的超补偿生长现象最为明显;所测的9个叶性状在相同比例平茬处理下,不同生长时期间的差异性较大;在同一生长时期内,留茬0%与其他(25%、50%、75%)平茬强度和CK之间的叶鲜质量、饱和鲜质量、干质量、叶面积均存在显著性差异(P <0.05)。除留茬0%外,其他处理及CK的叶性状变异系数均<50%,属于中等变异,留茬0%的叶性状最易出现强变异。梭梭各个叶功能性状间均存在一定的相关性,平茬可一定程度上增加叶性状间的相关性;通过主成分分析表明:叶鲜质量和叶饱和鲜质量可作为平茬梭梭叶功能性状评价的主要指标。【结论】研究表明对退化、干枯衰老的梭梭有必要进行适当合理的平茬,乌兰布和沙漠人工梭梭林可采取留茬0%的高度进行平茬,以促进林分生长和可持续发展,有利于恢复其在荒漠生态系统中的功能。
【Objective】To reveal the adaptation strategies of Haloxylon ammodendron leaves to the environment at different stubble strength and provide scientific basis for better nurturing degraded artificial H.ammodendron forests.【Method】Taking a 20 year old artificial H.ammodendron forest near the northeast edge of the Ulanbuhe desert as the research object,a total of 9 indicators of leaf functional traits were measured after different proportions of flat cropping.The changes in leaf functional traits of H.ammodendron were explored and the differences between different growth periods after flat cropping were analyzed,aiming to reveal the adaptation strategies of H.ammodendron to arid desert environments after flat cropping.【Result】Different proportions of flat stubble H.ammodendron showed varying degrees of compensatory growth,with the most obvious phenomenon of over compensatory growth observed in 0%of stubble;The 9 leaf traits tested showed significant differences between different growth stages under the same proportion of flat cropping treatment;During the same growth period,there were significant differences(P<0.05)in leaf fresh mass,saturated fresh mass,dry mass, and leaf area between 0% stubble and other (25%, 50%, 75%) stubble strength and CK. Except for 0% stubble, the coefficient of variation of leaf traits under other treatments and CK was less than 50%, belonging to moderate variation. The leaf traits with 0% stubble were most prone to strong variation. There was a certain correlation between the functional traits of various leaves of H. ammodendron, and flat cropping increased the correlation between leaf traits to a certain extent;Principal component analysis showed that fresh leaf mass and saturated fresh leaf mass could be used as the main indicators for evaluating the functional traits of flat cut H. ammodendron leaves.【Conclusion】Research has shown that it is necessary to carry out appropriate and reasonable pruning for degraded, withered and aging H. ammodendron. Ulanbuhe desert artificial H. ammodendron forests can adopt pruning with a height of 0% to promote forest growth and sustainable development, which is conducive to restoring their functions in desert ecosystems.