文献类型：期刊文献

中文题名：乌兰布和沙漠沙冬青群落的根系分布特征

英文题名：Root distribution characteristics of Ammopiptanthus mongolicus community in Ulan Buh Desert

作者：齐凯[1] 辛智鸣[2] 张景波[2] 朱雅娟[1]

第一作者：齐凯

机构：[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

年份：2019

卷号：36

期号：7

起止页码：1706-1715

中文期刊名：草业科学

外文期刊名：Pratacultural Science

收录：CSTPCD;;CSCD:【CSCD2019_2020】；

基金：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)

语种：中文

中文关键词：沙冬青;伴生植物;根系分布;根系直径;干重;根长

外文关键词：Ammopiptanthus mongolicus;associated plant;root distribution;root diameter;dry mass;root length

分类号：Q948.113

摘要：通过全挖法研究了乌兰布和沙漠沙冬青(Ammopiptanthus mongolica)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(Artemisia xerophytica)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(Oxytropis neimonggolica)主要分布在50 cm土层内;两种多年生草本植物蒙疆苓菊(Jurinea mongolica)、蒙古韭(Allium mongolicum)和一年生草本植物蒙古虫实(Corispermum mongolicum)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。
The method of oven-drying and stratified digging was adopted to study the dry mass and length of roots of varied diameters of Ammopiptanthus mongolicus and its associated plants in the community,and the spatial differences in root distribution of different plants at different soil depths were analyzed in A.mongolica community in Ulan Buh desert.The results showed that there are four types of root systems based on their distribution depth for the seven plants in this community.The shrub A.mongolicus has the deepest root,which was mainly distributed in soil up to 120 cm.The root of two sub-shrubs,Artemisia xerophytica and A.ordosica,were mainly distributed within 80 cm and 70 cm depth,respectively.The root of the perennial herb Oxytropis neimonggolica was mainly distributed within 50 cm depth.Two perennial herbs,Jurinea mongolica and Allium mongolicum,and the annual herb Corispermum mongolicum have shallow root systems,which are 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 through spatial differences in the distribution of roots having different diameters,which promotes the coexistence of species and improves plant diversity in A.mongolicus community.