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1706-17157/2019草 业 科 学PRATACULTURAL SCIENCE第 36 卷第 7 期Vol.36, No.7DOI: 10.11829/j.issn.1001-0629.2018-0544齐凯,辛智鸣,张景波,朱雅娟. 乌兰布和沙漠沙冬青群落的根系分布特征. 草业科学, 2019, 36(7: 1706-1715.QI K, XIN Z M, ZHANG J B, ZHU Y J. Root distribution characteristics of Ammopiptanthusmongolicus community in Ulan Buh Desert.Pratacultural Science, 2019, 36(7: 1706-1715.乌兰布和沙漠沙冬青群落的根系分布特征齐 凯,辛智鸣,张景波,朱雅娟1221(1. 中国林业科学研究院荒漠化研究所,北京 100091;2. 中国林业科学研究院 沙漠林业实验中心,内蒙古 磴口 015200)摘要:通过全挖法研究了乌兰布和沙漠沙冬青(Ammopiptanthusmongolica与6种伴生植物不同土壤深度各径级根系的干重和根长,分析了7种植物根系分布的空间差异。结果表明,该群落内7种植物的根系可以分为4类,其中,灌木沙冬青根系最深,主要分布在120 cm土层以内;其次是两种半灌木旱蒿(Artemisiaxerophytica和黑沙蒿(A.ordosica,根系分别主要分布在80和70 cm土层内;多年生草本植物内蒙古棘豆(Oxytropisneimonggolica主要分布在50 cm土层内;两种多年生草本植物蒙疆苓菊(Jurineamongolica、蒙古韭(Alliummongolicum和一年生草本植物蒙古虫实(Corispermummongolicum根系较浅,分别主要分布在30、20和10 cm土层内。根系最大深度排序为沙冬青(160 cm >旱蒿(130 cm > 黑沙蒿(100 cm > 内蒙古棘豆(80 cm > 蒙疆苓菊(30 cm > 蒙古韭(20 cm和蒙古虫实(20 cm。因此,沙冬青群落的7种植物通过不同径级根系分布的空间差异利用不同深度的土壤水分,从而促进物种共存,提高了群落的植物多样性。关键词:沙冬青;伴生植物;根系分布;根系直径;干重;根长中图分类号:Q948.113 文献标志码:A 文章编号:1001-0629(201907-1706-10RootdistributioncharacteristicsofAmmopiptanthusmongolicuscommunityinUlanBuhDesertQI Kai, XIN Zhiming, ZHANG Jingbo, ZHU Yajuan1221(1. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China;2. Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, Inner Mongolia, ChinaAbstract: The method of oven-drying and stratified digging was adopted to study the dry mass and length of roots of varieddiameters of Ammopiptanthusmongolicus and its associated plants in the community, and the spatial differences in rootdistribution of different plants at different soil depths were analyzed in A.mongolica community in Ulan Buh desert.Theresults showed that there are four types of root systems based on their distribution depth for the seven plants in thiscommunity. The shrub A.mongolicus has the deepest root, which was mainly distributed in soil up to 120 cm. The root oftwo sub-shrubs, Artemisiaxerophytica and A.ordosica, were mainly distributed within 80 cm and 70 cm depth, respectively.The root of the perennial herb Oxytropisneimonggolica was mainly distributed within 50 cm depth. Two perennial herbs,Jurineamongolica and Alliummongolicum, and the annual herb Corispermummongolicum have shallow root systems, whichare mainly distributed within 30 cm, 20 cm, and 10 cm depth, respectively. The order of the maximal root depth was:A.mongolicus (160 cm > A.xerophytica (130 cm > A.ordosica (100 cm > O.neimonggolica (80 cm > J.mongolica (30 cm >A.mongolicum (20 cm, and C.mongolicum (20 cm. Therefore, utilization of soil water in different soil depths is achieved收稿日期:2018-09-30 接受日期:2019-01-18基金项目:中国林业科学研究院中央级公益性科研院所基本科研业务费专项资金(CAFZC2017M006第一作者:齐凯 (1992-,男,河北吴桥人,在读硕士生,研究方向为荒漠植物生态学。E-mail:1104834014@qq.com通信作者:朱雅娟 (1980-