抚育间伐对不同类型华北落叶松林分涵养水源能力影响  

Comparison on effects of thinning on water conservation of different Larix Principis-rupprechtii stands in northern mountain of Hebei province

作　　者：平丽丽 李云飞[2] 冯楷斌 陈继东[2] 邓丽娟[2] ING Lili;LI Yunfei;FENG Kaibin;CHEN Jidong;DENG Lijuan(Yudaokou State-owned Ranch of Hebei Province,Weichang 068450,China;Mulanweichang National Forestry Administration of Hebei Province,Weichang 068450,China;Chengde Academy of Agricultural and Forstry Science,Chengde 067000,China)

机构地区：[1]河北国营御道口牧场,河北围场068450 [2]河北省木兰围场国有林场管理局,河北围场068450 [3]承德市农林科学院,河北承德067000

出　　处：《林业与生态科学》2019年第4期369-374,共6页Forestry and Ecological Sciences

基　　金：“十三五”重点研发计划子课题(2016YFD060020303)

摘　　要：为了科学评价华北落叶松林的抚育成效、促进冀北山地森林的可持续经营,选择华北落叶松纯林、落桦混交林与落油混交林3种典型林分,分析比较抚育间伐前后林地的植被截留、枯落物层持水和土壤蓄水能力,以确定抚育间伐对华北落叶松林分涵养水源能力的影响。结果表明:(1)对于3种类型的林分,抚育间伐均降低了乔木层的降水截留量,增加了灌草层的截留量,并使总截留量有所增加,分别增加了0.20 t/hm^2、1.32 t/hm^2、0.88 t/hm^2。(2)与对照相比,抚育间伐提高了枯落物半分解层厚度、储量及持水量,枯落物未分解层则相反,但差异均较小;不同类型林分中,落桦混交林的枯落物层厚度、储量最高,分别为4.9 cm和12.70 t/hm^2,华北落叶松纯林最低,分别为3.6 cm和5.79 t/hm^2;枯落物持水量则是落油混交林最高,为14.05 t/hm^2,落叶松纯林最低,为5.56 t/hm^2。(3)抚育间伐提高了3种类型林分的土壤最大持水量。其中,落桦混交林的增加幅度最大,增加了23.15 t/hm^2,落油混交林增加幅度最小,增加了8.74 t/hm^2。抚育间伐提高了3种林分的水源涵养能力,总体来看落桦混交林的抚育效果最好。In order to scientifically evaluate the breeding effect of Larix principis-rupprechtii forest and promote the sustainable management of forests in north mountain of Hebei province,three typical stands of Larix principis-rupprechtii forest,Larix principis-rupprechtii+Betula platyphylla mixed forest and Larix principis-rupprechtii+Pinus tabulaeformis mixed forest were selected to analyse the interception,litter layer water-holding capacity and soil water storage capacity of forest land before and after thinning,thus to determine the effect of tending and thinning on the water conservation function of Larix principis-rupprechtii.The results showed that:(1)For the three types of stands,the interception of the arbor layer reduced,and the interception of the shrub layer increased through tending thinning,and increased the total interception,which were 1.32 t/hm^2,0.88 t/hm^2,and 0.20 t/hm^2 respectively.(2)Compared with the control plot,the thickness,reserves and water-holding capacity of litter semi-decomposition layer in thinned plot were increased to some extent,while the undecomposed layer of litter was opposite,but the difference between them was small.In different types of stands,the litter layer thickness and reserve of Larix principis-rupprechtii+Betula platyphylla mixed forest were the highest,which were 4.9 cm and 12.70 t/hm^2,respectively,while the lowest was larch pure forest,which were 3.6 cm and 5.79 t/hm^2.The litter layer water-holding capacity was the highest in Larix principis-rupprechtii+Pinus tabulaeformis mixed forest(14.05 t/hm^2),and the lowest in Larix principis-rupprechtii forest(5.56 t/hm^2).(3)The maximum soil water-holding capacity of the three types of forests increased through tending thinning.The increase of Larix principis-rupprechtii+Betula platyphylla mixed forest was the largest(23.15 t/hm^2),while the Larix principis-rupprechtii+Pinus tabulaeformis mixed forest has the minimum growth,which was 8.74 t/hm^2.Water conservation of larch forest can be improved by tending thinning,and the

关 键 词：抚育间伐 华北落叶松 涵养水源 植被截留 枯落物持水 土壤蓄水 

分 类 号：S714.2[农业科学—林学] S753.7