摘要
【目的】坝上地区是京津冀地区的重要水源涵养功能区,研究不同森林类型凋落物层的水源涵养能力可以为该区域植被的恢复、经营以及水土保持提供依据。【方法】在张家口市和平林场内选择华北落叶松Larix gmelinii var.principis-rupprechtii林、白桦Betula platyphylla林、山杨Populus davidiana-白桦林(杨桦混交林)和华北落叶松-白桦林(落桦混交林)4种森林类型为研究对象,通过野外调查和室内浸泡法测定凋落物层的各项生态水文指标。【结果】①不同森林凋落物层厚度在32.0~62.0 mm内变化,从大到小依次为落桦混交林、华北落叶松林、杨桦混交林、白桦林。②白桦林和杨桦混交林凋落物层的最大持水率、最大拦蓄率、有效拦蓄率大于落桦混交林和华北落叶松林,其中白桦林最大,分别为231.15%、207.60%和172.94%;华北落叶松林最小,分别为208.92%、170.29%和138.95%。③4种森林类型凋落物层的生物量为8.27~23.33 t·hm^(-2),最大持水量为18.96~49.71 t·hm^(-2),最大拦蓄量为16.73~39.05 t·hm^(-2),有效拦蓄量为13.90~31.56 t·hm^(-2),基本规律为华北落叶松林>落桦混交林>杨桦混交林>白桦林。④4种森林凋落物层持水量与浸水时长符合对数函数关系(R^(2)>0.94);吸水速率与浸水时长符合幂函数关系(R^(2)>0.92)。【结论】华北落叶松林单位质量下的凋落物层吸持水性能低于白桦林,但综合考虑凋落物生物量后,其持水和拦蓄水总量显著高于后者,综合水源涵养能力强。图5表3参38.
[Objective]This study,with an investigation of the water conservation capacity of litter layers in different forest types in the Bashang region,an important water conservation functional area in the Beijing-Tianjin-Hebei region,is aimed to provide a basis for the restoration,management and improvement of water and soil conservation in this region.[Method]With four types of forests,including Larix gmelinii var.principis-rupprechtii(PL),Betula platyphylla(NP),Populus davidiana and B.platyphylla mixed forest(NBP),L.gmelinii var.principis-rupprechtii and B.platyphylla mixed forest(PBL),selected as research objects in the Heping Forest Farm in Zhangjiakou City,field investigations and indoor immersion methods were employed to measure the ecological hydrological indicators of litter layers.[Result](1)The thickness of litter layers in different forests ranged from 32.0 to 62.0 mm,with the PBL mixed forest having the thickest litter layer,followed by PL forest,NBP mixed forest,and NP forest.(2)The maximum water holding rate,maximum retention rate,and effective retention rate of litter layers were higher in NP forest and NBP mixed forest than PBL mixed forest and PL forest,with NP forest having the highest values of 231.15%,207.60%,and 172.94%,respectively,and PL forest having the lowest values of 208.92%,170.29%,and 138.95%,respectively.(3)The biomass,maximum water holding capacity,maximum retention capacity,and effective retention capacity of litter layers in the four types of forests ranged from 8.27 to 23.33 t·hm^(-2),18.96 to 49.71 t·hm^(-2),16.73 to 39.05 t·hm^(-2),and 13.90 to 31.56 t·hm^(-2),respectively,and the general trend was PL>PBL mixed forest>NBP mixed forest>NP forest.(4)The water holding capacity of litter layers in the four types of forests showed a logarithmic function relationship with the immersion time(R^(2)>0.94)while the water absorption rate showed a power function relationship with the immersion time(R^(2)>0.92).[Conclusion]The water absorption performance of litter layers per unit mass in PL
作者
蔚阿龙
温慧
丛日春
侯美娟
李瀚之
YU Along;WEN Hui;CONG Richun;HOU Meijuan;LI Hanzhi(Institute of Ecological Protection and Restoration,Chinese Academy of Forestry,Beijing 100091,China;National Ecosystem Research Station of Chongli Forest,Chinese Academy of Forestry,Zhangjiakou 076350,Hebei,China;Heping Forest Farm of Zhangjiakou,Zhangjiakou 076350,Hebei,China;Zibo Water Conservancy Bureau,Zibo 255020,Shandong,China)
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2024年第5期959-969,共11页
Journal of Zhejiang A&F University
基金
国家自然科学基金资助项目(42107253,32001372,32071558,32061123005)
中国林业科学研究院基本科研业务费专项资金项目(CAFYBB2022SY044)。
关键词
坝上地区
森林类型
凋落物
水源涵养
Bashang regin
forest types
litter
water conservation
