浑善达克沙地榆树疏林生长季土壤水分含量动态变化  

Dynamic Changes of Soil Water Content during the Growing Season of Ulmus pumila Open Forest in Otindag Sandy Land

作　　者：闫德仁[1] 黄海广 闫婷[1] 胡小龙[1] 杨制国 YAN Deren;HUANG Haiguang;YAN Ting;HU Xiaolong;YANG Zhiguo(Inner Mongolia Academy of Forestry,Hohhot 010010,Inner Mongolia;Inner Mongolia Duolun Otindag Desert Ecosystem Station,Xilingol 027300,Inner Mongolia)

机构地区：[1]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010 [2]内蒙古多伦浑善达克沙地生态系统定位观测研究站,内蒙古锡林郭勒027300

出　　处：《温带林业研究》2025年第2期31-36,62,共7页Journal of Temperate Forestry Research

基　　金：内蒙古科技攻关计划资助(2021GG0031)。

摘　　要：【目的】土壤水分含量动态变化对科学经营管理浑善达克沙地榆树疏林具有重要指导意义。【方法】采用土壤水分自动记录仪定位定时监测榆树疏林、疏林沙化和疏林流沙三种立地条件下土壤水分含量的变化。【结果】生长季节(4—9月)不同立地条件下,不同土层深度土壤水分含量均高于冻融季(1—3月);在生长季节,榆树疏林立地条件下,0~20 cm土层水分含量最高,其次是20~40 cm土层水分含量,而80~120 cm土层水分含量最低;疏林沙化立地条件下,0~20 cm土层水分含量最高,其次是20~40 cm土层水分含量,而60~80 cm土层水分含量最低;疏林流沙立地条件下,60~80 cm土层水分含量最高,其次是160~200 cm土层水分含量,而120~160 cm土层水分含量最低。【结论】不同季节、不同土层深度和不同立地条件下榆树疏林土壤水分含量存在明显的变化规律,且地表植被生长状况影响降雨入渗深度。【Objective】The dynamic changes of soil water content have important guiding significance for scientific management of Ulmus pumila open forest in Otindag sandy land.【Method】The changes of soil water content in sandy open forest and quicksand open forest were monitored with automatic soil water recorder.【Result】The results showed that the soil water content at different soil depths during the growing season(April to September)was higher than that in the freeze-thaw season(January to March)under different site conditions.In the growing season,under the condition of open forest site,the soil water content of 0-20 cm soil layer was the highest,followed by that of 20-40 cm soil layer,and that of 80-120 cm soil layer was the lowest.Under the condition of sandy open forest site,the soil water content in 0-20 cm soil layer was the highest,followed by that in 20-40 cm soil layer,and the lowest in 60-80 cm soil layer,in the growing season.Under the condition of quicksand open forest site,the soil water content of 60-80 cm soil layer was the highest,followed by that of 160-200 cm soil layer,and that of 120-160 cm soil layer was the lowest,in the growing season.【Conclusion】The soil water content of Ulmus pumila open forest had obvious change rules under different seasons,different soil depth and different site conditions,and the vegetation growth affected the rainfall infiltration depth.

关 键 词：浑善达克沙地 榆树疏林 土壤水分 

分 类 号：S714.2[农业科学—林学]