摘要
通过ECH2O土壤水分监测系统和EM50数据采集器对北京山区2种典型人工林地(栓皮栎林和油松林)土壤水分含量进行定位、长期观测、数据处理,分析不同降雨强度对不同林分类型土壤水分时空变化特征及差异性的影响。结果表明:(1)栓皮栎林地和油松林地日平均土壤储水量随降雨量显著变化,月平均土壤储水量随降雨量的增加呈上升趋势。(2)在垂直方向上,栓皮栎和油松林地0—40cm土层土壤储水量的增加率随雨强增加而降低,栓皮栎林地土壤储水量平均增加率(94.17%)大于油松(84.19%),而40—100cm土层土壤储水量的增加率随雨强增加均呈现增加趋势,且油松林地土壤储水量平均增加率(15.81%)大于栓皮栎林地(5.83%)。(3)栓皮栎与油松林地相同土层土壤储水量差异性显著(p<0.05),同一林地不同土层土壤储水量也到达差异性显著(p<0.05)。从栓皮栎和油松林地的土壤水分时空变化特征来看,2种林地土壤储水量分布不同。在造林树种选择时,可以考虑将油松和栓皮栎2个树种进行混交。研究结果将为北京山区植被建设和管理提供参考和理论依据。
The effects of different rainfall intensity on spatial and temporal variation characteristics of soil moisture of different forest types were studied based on positioning and long term observation and data processing.Soil moisture of the Quercus variabilis forest land and the Pinus tabulaeformis forest land in Beijing region was monitored by the ECH2 O monitoring system and the EM50 data acquisition system.The results showed that：（1）The daily soil water storage amount changed significantly with the precipitation,howeve,the average monthly soil water storage increased with the increasing amount of rainfall.（2）Vertically,the increase rate of soil water storage in the 0-40 cm soil layer of the Q.variabilis and P.tabulaeformis forest land decreased with the increase of the rainfall intensity,and the average increase rate of soil water storage of the Q.variabilis forest land（94.17%）was higher than that of the P.tabulaeformis forest land（84.19%）,while the soil water storage rate in the 40-100 cm soil layer showed an increasing trend,and the average increase rate of soil water storage of the P.tabulaeformis forest land（15.81%）was greater than that of the Q.variabilis forest land（5.83%）.（3）Soil water storage in the same layer was significantly different between the Q.variabilis and P.tabulaeformis forest land（p〈0.05）,and it was also significantly different between different soil layers in the same forest land（p〈0.05）.In terms of the spatial and temporal characteristics of soil moisture change in the Q.variabilis and P.tabulaeformi forest land,soil water storage distributions of the two forest types were different.Therefore,it worths considering mixing the two species together in afforestation.The results of this study could provide a reference and theoretical basis forthe construction and management of vegetation in the mountainous areas of Beijing.
作者
侯贵荣
余新晓
刘自强
贾国栋
李瀚之
刘文娜
李勇
HOU Guirong YU Xinxiao LIU Ziqiang JIA Guodong LI Hanzhi LIU Wenna LI Yong(Key Laboratory of Soil ＆ Water Conservation and Deserti fication Combating of Ministry of Education, Beijing Forestry University, Beijing 100083)
出处
《水土保持学报》
CSCD
北大核心
2017年第3期209-215,共7页
Journal of Soil and Water Conservation
基金
国家重点研发计划项目(2016YFC0500802)
林果业生态环境功能提升协同创新中心(PXM2017_014207_000038)
北京市科技计划项目(Z151100001415002)
关键词
北京山区
降雨强度
土壤储水量
时空变化
Beijing mountain region
rainfall intensity
soil water storage
spatial and temporal variation characteristics
