水土保持通报2023，Vol.43Issue(6)：10-17,8.DOI:10.13961/j.cnki.stbctb.2023.06.002
腾格里沙漠东北缘飞播植物群落土壤水分特征
Soil Water Characteristics of Different Aerial-seeded Plant Communities at Northeastern Edge of Tengger Desert
摘要
Abstract
[Objective]Soil water characteristics of different plant communities at different slope positions on aerial-seeded afforestation areas in 1992 were studied at the northeastern edge of the Tengger Desert in order to provide a theoretical basis for the rational construction and management of an artificial sand fixation vegetation system in the arid desert areas of Northwest China.[Methods]Soil water contents at the depth of 200 cm for different plant communities at different slope positions were measured using the ring knife method.The water distribution,variability and water storage deficit of soil were analyzed.[Results]① The average soil water contents of different plant communities followed the order of Hedysarum scoparium community(0.57％)＞Calligonum mongolicum community(0.54％)＞H.scoparium+C.mongolicum community(0.51％)＞C.mongolicum+H.scoparium community(0.51％).There was a significant difference(p＜0.05)between the H.scoparium and the H.scoparium+C.mongolicum communities,as well as the C.mongolicum+H.scoparium community.The average soil water contents at different slope positions followed the order of bottom slope＞middle slope＞top slope.The vertical variability of soil water in the two combined communities of H.scoparium and C.mongolicum,and its variability with slope position were significantly smaller than the vertical variability of soil water in the H.scoparium and C.mongolicum communities.② The variation range of total soil water storage in different plant communities was between 15.45 mm and 17.79 mm,and the trend of soil water storage with soil depth was consistent with soil water content.③ Soil water storage deficits for the different plant communities followed the order of H.scoparium+C.mongolicum community(97.74％)＞C.mongolicum+H.scoparium community(97.62％)＞H.scoparium community(97.48％)＞C.mongolicum community(97.44％).[Conclusion]Soil water content was relatively low(less than 1％).Soil water content at the bottom of the sand dune was greater than at the middle slope and top slope positions,and soil water content increased with soil depth.The vertical variability of soil water content in the H.scoparium and C.mongolicum combined communities was lower than the soil water content of the single species communities.Therefore,a plant community comprised of a combination of H.scoparium and C.mongolicum can utilize soil water to a greater extent,has greater water absorption,and uses soil water more efficiently.These combination plant communities are better adapted to arid environments.关键词
飞播/植物群落/土壤水分特征/腾格里沙漠东北缘Key words
aerial seeding/plant communities/soil water characteristics/the northeastern edge of Tengger Desert分类
农业科技引用本文复制引用
唐国栋,葛楠,张铁军,郭建英,刘艳萍..腾格里沙漠东北缘飞播植物群落土壤水分特征[J].水土保持通报,2023,43(6):10-17,8.基金项目
内蒙古自治区科技计划项目"黄河流域腾格里沙漠飞播造林区水资源高效利用新业态技术研究"(2022YFHH0096) （2022YFHH0096）
中国水科院基本科研业务费项目(MK2021J12) （MK2021J12）
阿拉善左旗2020年飞播造林科技支撑项目(MK0199B012021) （MK0199B012021）
