科尔沁沙地南缘樟子松人工林对土壤水盐的影响  

Effects of Pinus sylvestris var.mongolica Plantation on Soil Water and Salt in the Southern Edge of Horqin Sandy Land

作　　者：郎明翰 张日升 韩辉 王旭 凡胜豪 LANG Minghan;ZHANG Risheng;HAN Hui;WANG Xu;FAN Shenghao(Liaoning Institute of Sandy Land Control and Utilization,National Positioning Observation and Research Station of Horqin Sandy Land Ecosystem,Fuxin,Liaoning 123000;Soil and Water Conservation Bureau of Liaoning Province,Shenyang 110003)

机构地区：[1]辽宁省沙地治理与利用研究所,辽宁章古台科尔沁沙地生态系统国家定位观测研究站,辽宁阜新123000 [2]辽宁省水利事务服务中心,沈阳110003

出　　处：《水土保持学报》2023年第5期370-376,共7页Journal of Soil and Water Conservation

基　　金：国家自然科学基金项目(32071836);中央财政林业科技推广示范项目(黑[2020]TG16号);辽宁省农业科学院基本科研业务费计划项目(2021HQ1913)。

摘　　要：为掌握科尔沁沙地南缘樟子松造林40多年对土壤水分、盐度的影响。以科尔沁沙地樟子松林地、草地2020年3月至2021年11月土壤、气象数据为基础,采用双累积曲线法(DCM)验证样地选取的合理性,利用空间代替时间法(STM)研究樟子松林地、草地土壤含水量、盐度的变化规律,以及与气象因子关系的差异。樟子松林地改变了土壤纵向剖面水分、盐度分布规律,二者均趋于正“S”形分布;林地有效提高土壤储水量(p<0.05),降低土壤盐度,缩减水分次活跃层范围;林地土壤水分变异性更高(p<0.05),盐度变异性更低(p>0.05);林地的气象因子与土壤水分、盐度指标各分项之间关联程度与草地不同,减弱与降雨的相关性,增加与水汽压亏缺的相关系数。樟子松林生态系统具有较强的涵养水源、抑制土壤盐渍化的功能。To understand the impact of more than 40 years of afforestation of Pinus sylvestris plantation on soil water and salt in the southern edge of Horqin sandy land,based on the soil and meteorological data of P.sylvestris forest land and grassland from March 2020 to November 2021 in Horqin sandy land,the double cumulative curve method(DCM)was used to verify the rationality of sample plot selection,the spatial instead of time method(STM)was used to study the variation pattern of soil water content and salinity in P.sylvestris forest land and grassland and the differences in their correlation with meteorological factors.P.sylvestris forest changed the distribution of water and salt in the longitudinal profile of the soil,both tended to be in a positive"S"shape.Forest effectively increased soil water storage(p<0.05),reduced soil salinity,and reduced the range of water sub active layer.The variability of forest soil water was higher(p<0.05),while the variability of salinity was lower(p>0.05).The correlation degree between the meteorological factors and soil moisture and salinity indicators in forest was different from that in grassland,weakening the correlation with rainfall and increasing the correlation coefficient with water vapor pressure deficit.These results indicated that P.sylvestris forest ecosystem had a strong function of water conservation and soil salinization inhibition.

关 键 词：科尔沁沙地 樟子松人工林 土壤含水量 土壤盐度 

分 类 号：S715.3[农业科学—林学]