發(fā)布時間：2018-11-11 14:37

【摘要】：通過ECH2O土壤水分監(jiān)測系統(tǒng)和EM50數(shù)據(jù)采集器對北京山區(qū)2種典型人工林地(栓皮櫟林和油松林)土壤水分含量進行定位、長期觀測、數(shù)據(jù)處理,分析不同降雨強度對不同林分類型土壤水分時空變化特征及差異性的影響。結(jié)果表明:(1)栓皮櫟林地和油松林地日平均土壤儲水量隨降雨量顯著變化,月平均土壤儲水量隨降雨量的增加呈上升趨勢。(2)在垂直方向上,栓皮櫟和油松林地0—40cm土層土壤儲水量的增加率隨雨強增加而降低,栓皮櫟林地土壤儲水量平均增加率(94.17%)大于油松(84.19%),而40—100cm土層土壤儲水量的增加率隨雨強增加均呈現(xiàn)增加趨勢,且油松林地土壤儲水量平均增加率(15.81%)大于栓皮櫟林地(5.83%)。(3)栓皮櫟與油松林地相同土層土壤儲水量差異性顯著(p0.05),同一林地不同土層土壤儲水量也到達差異性顯著(p0.05)。從栓皮櫟和油松林地的土壤水分時空變化特征來看,2種林地土壤儲水量分布不同。在造林樹種選擇時,可以考慮將油松和栓皮櫟2個樹種進行混交。研究結(jié)果將為北京山區(qū)植被建設(shè)和管理提供參考和理論依據(jù)。
[Abstract]:The soil moisture content of two typical artificial forests (Quercus variabilis and Pinus tabulaeformis) in mountainous area of Beijing was determined by ECH2O soil moisture monitoring system and EM50 data collector. The effects of different rainfall intensity on the temporal and spatial variation and difference of soil moisture in different stand types were analyzed. The results showed that: (1) the daily average soil water storage in Quercus variabilis forest and Pinus tabulaeformis forest changed significantly with rainfall, and the monthly average soil water storage increased with the increase of rainfall. The increase rate of soil water storage in 0-40cm soil layer of Quercus variabilis and Pinus tabulaeformis forest decreased with the increase of rainfall intensity. The average increase rate of soil water storage in Quercus variabilis forest land (94.17%) was higher than that in Pinus tabulaeformis forest (84.19%). However, the increasing rate of soil water storage in 40-100cm soil layer showed an increasing trend with the increase of rainfall intensity. The average increase rate of soil water storage in Pinus tabulaeformis forest (15.81%) was higher than that in Quercus variabilis forest (5.83%). (3). The difference of soil water storage between Quercus variabilis and Pinus tabulaeformis forest was significant (p0.05). There were significant differences in soil water storage between different soil layers in the same forest land (p0.05). According to the temporal and spatial characteristics of soil moisture in Quercus variabilis and Pinus tabulaeformis forest land, the distribution of soil water storage was different. Two species of Pinus tabulaeformis and Quercus variabilis can be mixed in the selection of afforestation tree species. The results will provide reference and theoretical basis for vegetation construction and management in Beijing mountainous area.
【作者單位】： 北京林業(yè)大學(xué)水土保持與荒漠化防治教育部重點實驗室;
【基金】：國家重點研發(fā)計劃項目(2016YFC0500802) 林果業(yè)生態(tài)環(huán)境功能提升協(xié)同創(chuàng)新中心(PXM2017_014207_000038) 北京市科技計劃項目(Z151100001415002)
【分類號】：S714.2

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