油蒿与沙柳灌木地藓结皮发育差异研究  

Differences in moss crust development between Artemisia ordosica and Salix pasmmophia shrubs

作　　者：莫秋霞 宋炜 卜崇峰[3,4] 王春[3] 王鹤鸣 李亚红 MO Qiuxia;SONG Wei;BU Chongfeng;WANG Chun;WANG Heming;LI Yahong(College of Resources and Environment,Northwest A&F University,Yangling 712100,Shaanxi,China;Landscape and Engineering Branch of Sichuan Highway Planning,Survey,Design and Research Institute Ltd.,Chengdu 610041,Sichuan,China;Institute of Soil and Water Conservation,Northwest A&F University,Yangling 712100,Shaanxi,China;Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100,Shaanxi,China;College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling 712100,Shaanxi,China;Office of Meixian County Party Committee,Baoji 722399,Shaanxi,China)

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]四川省公路规划勘察设计研究院有限公司景观与工程分院,四川成都610041 [3]西北农林科技大学水土保持研究所,陕西杨凌712100 [4]中国科学院水利部水土保持研究所,陕西杨凌712100 [5]西北农林科技大学水利与建筑学院,陕西杨凌712100 [6]眉县县委办公室,陕西宝鸡722399

出　　处：《干旱区研究》2023年第6期979-987,共9页Arid Zone Research

基　　金：国家自然科学基金面上项目(41971131);鹏程尚学教育金(S5030022001)。

摘　　要：针对毛乌素沙地油蒿灌木地的藓结皮发育总是明显优于沙柳灌木地的现象,基于两类灌木地的土壤性状、藓结皮发育指标的观测分析,结合两类灌木不同器官浸提液对藓结皮发育的化感试验,揭示造成两类灌木地中藓结皮发育差异巨大的原因。结果显示:(1)两类灌木地藓结皮的盖度存在显著差异(P<0.05),灌木地藓结皮的总盖度及冠层下、冠层间盖度均表现为:油蒿>沙柳,且油蒿灌木地的藓结皮总盖度及冠层下、冠层间的藓结皮盖度分别为沙柳灌木地相应藓结皮盖度的1.6倍、2.9倍和1.1倍;(2)Pearson相关分析显示,冠层下藓结皮盖度与土壤含水率显著正相关、厚度与粉粒含量显著正相关;冠层间藓结皮盖度与土壤含水率、黏粒含量显著正相关(P<0.05)。油蒿灌木地较高的土壤含水率和黏粒、粉粒含量明显促进了藓结皮的发育;(3)化感试验表明,油蒿、沙柳的根、茎、叶水浸提液均抑制了藓结皮的发育,即化感综合效应(SE)均为负值。其中,0.2 g·mL^(-1)沙柳叶水浸提液的化感抑制作用最强,SE为-0.95,抑制作用显著高于油蒿叶(SE为-0.65)(P<0.05)。表明油蒿灌木地较高的土壤含水率、黏粒和粉粒含量,以及沙柳叶对藓结皮显著的化感抑制作用,共同导致油蒿灌木地藓结皮的发育状况优于沙柳地。The soil properties and moss crust development indices in typical Artemisia ordosica and Salix pasmmophia shrub land plots in the sandy area of Mu Us Sandland have previously been analyzed in combination with allelopathic tests of the extracts from the different shrub organs.The results showed that moss crust development in A.ordosica shrub land was better than that in S.pasmmophia shrub land,but the reason is unclear,and elucidating it is the aim of this investigation.A significant difference in the moss crust coverage between the two kinds of shrubs(P<0.05)was identified.The total moss crust coverage and sub-canopy and inter-canopy crust coverage were as follows:A.ordosica>S.pasmmophia,and the total moss crust coverage and subcanopy and intercanopy crust coverage in the A.ordosica shrub land were 1.6,2.9,and 1.1 times higher than those in the sand S.pasmmophia shrub land,respectively.Furthermore,there was no significant difference in moss crust thickness between the two kinds of shrubs(P>0.05).Pearson correlation analysis showed that the moss crust coverage in the sub-canopy was significantly positively correlated with the soil water content,moss crust thickness in the subcanopy was significantly positively correlated with silt content,and inter-canopy moss crust coverage was significantly positively correlated with soil water and clay content(P<0.05).The higher soil water,clay,and silt contents in the A.ordosica shrub land promoted the development of moss crusts.The aqueous extracts from the roots,stems,and leaves of the A.ordosica and S.pasmmophia inhibited the development of moss crusts;that is,the allelopathic synthesis effect(SE)was negative.Specifically,the allelopathic inhibitory effect of the 0.2 g·mL^(-1) aqueous extract of the S.pasmmophia leaves was the strongest,with an SE of−0.95.The inhibitory effect was significantly higher than that of the A.ordosica leaves(SE=−0.65).It can be inferred from the results that the higher soil water,clay,and silt contents in the A.ordosica shrub land and the si

关 键 词：油蒿 沙柳 藓结皮 化感作用 差异研究 毛乌素沙地 

分 类 号：Q948[生物学—植物学]