摘要
灌丛沙堆是水蚀风蚀交错带典型的风积地貌景观。在黄土高原典型水蚀风蚀交错带,选择4种常见不同大小级的灌丛沙堆(小、中、大型和枯死灌丛沙堆),对灌丛沙堆的基本形态、土壤特性、差异性及相关性进行定量分析。结果表明:(1)灌丛演替变化显著影响沙堆发育,随着灌丛生物量的增加,沙堆体积也增大,当灌丛演替到稳定阶段时灌丛沙堆的发育也趋于稳定(P<0.05)。(2)灌丛沙堆的固沙量、高度及土壤容重因位置而异,灌丛沙堆主根处的固沙量和高度均为最大,边缘处相对较小,土壤容重反之。(3)枯死、大、中和小型灌丛沙堆土壤的有机质含量分别是裸地的1.54,1.92,1.46,1.30倍;土壤湿度分别是裸地的2.05,1.93,1.79,1.52倍。(4)灌丛沙堆边缘与主根3/4处水分、养分含量高于灌丛内其他位置。
The shrub mound is a typical aeolian landform in the cross areas of wind-water erosion on Loess Plateau in China.Four sizes scale shrub mounds were selected to analyze the mound basic form,soil properties and correlations.The results showed：（1）The shrub succession significantly affected the development of mound.The mound volume was increased as the shrub biomass expansion.Until the shrubs succeeds in the stabilization phase,the mound volume tends to be stable（P〈0.05）.（2）The amount,height and soil bulk density of the mound varied in the different position：the binding-sand quantity and height of the mound were the largest at the trap root,but were lowest in the edge.The soil bulk density showed the opposite characteristics.（3）The soil organic matter content of mound under the death,large,medium and small shrub patches were 1.54,1.92,1.46 and 1.30 times than the bare land,respectively;the soil moisture were 2.05,1.93,1.79 and 1.52 times than that of the bare land,respectively.（4）The soil moisture and soil organic matter content in the edge of the mound to three quarters of the trap root were higher than those in other positions of the mound.
作者
路荣
贾超
郝红敏
黄泽
刘玉
苗海涛
武高林
LU Rong1,JIA Chao1,HAO Hongmin1,HUANG Ze1,LIU Yu1,2,MIAO Haitao1,2,WU Gaolin1,2(1. State Key Laboratory of Soil Erosion and Drylancl Farming on the Loess Plateau, Northwest A＆F University, Yangling , Shanngxi 712100, 2. Institute of Soil and Water Conservation , Chinese Academy of Sciences and Ministry of Water Resources, Yangling , Shannxi 71210)
出处
《水土保持学报》
CSCD
北大核心
2018年第3期74-79,85,共7页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(41371282,41722107)
关键词
灌丛沙堆
水蚀风蚀交错作用
沙堆演替形态
水养特征
shrub patch
water-wind erosion interlacing
mound morphological succession
moisture and nutrient characteristics
