南瓮河自然保护区典型林分土壤水文效应研究  

Soil Hydrological Effect of Typical Stands in Nanwenghe Nature Reserve

作　　者：刘芳蕊 王立中 刘学爽 韦昌雷 

机构地区：[1]大兴安岭林业集团公司农业林业科学研究院,黑龙江嫩江源森林生态系统国家定位观测研究站,黑龙江大兴安岭165000

出　　处：《防护林科技》2018年第2期8-9,25,共3页Protection Forest Science and Technology

摘　　要：森林土壤的水文效应是评价水源涵养功能重要指标。以草类兴安落叶松林、白桦林和山杨林作为研究对象,对南瓮河国家级自然保护区不同林型土壤水文效应进行研究,结果表明:(1)不同林型土壤容重均随土层深度增加而增加,各林分类型土壤容重的顺序为草类兴安落叶松林(1.22g·cm^(-3))<草类白桦林(1.29g·cm^(-3))<草类山杨林(1.32g·cm^(-3))。(2)土壤非毛管孔隙度、总孔隙度草类兴安落叶松林最小,草类山杨林最大;毛管孔隙度草类白桦林最大,草类兴安落叶松林最小。(3)不同林型0~30cm土层土壤最大持水量差异较大,草类山杨林为1 514.78t·hm^(-2),最大;草类兴安落叶松林为1 397.53t·hm^(-2),最小。不同林型土壤有效贮水量为草类白桦林(127.33t·hm^(-2))<草类兴安落叶松林(135.81t·hm^(-2))<草类山杨林(202.01t·hm^(-2))。The hydrological effect of forest soil is an important index to evaluate the water conservation function.Taking Larix gmelinii forest grasses,Betula platyphyllaforest grasses and Populus simonii forest grasses as research objects,the soil hydrological effects of different forest types in Nanwenghe National Nature Reserve were studied.Result shows that:(1)The bulk density of soil in different forest types increase with the increase of soil depth.The order of soil bulk density of each forest type is:Larix gmelinii forest grasses(1.22 g·cm3)> Betula platyphyllaforest grasses(1.29 g ·cm^(-3))< Populus simonii forest grasses(1.32 g·cm^(-3));(2)Soil non-capillary porosity and total porosity.Larix gmelinii forest grasses is the smallest,Larix gmelinii forest grasses is the smallest;(3)The maximum water holding capacity at 0-30 cm soil layer in different forest types is quite different,the water holding capacity of Populus simonii forest grasses is maximum,being 1 514.78 t·hm^(-2);the water holding capacity of Larix gmelinii forest grasses is minimum,being 1 397.53 t·hm^(-2).The effective water storage capacity of different types of forest soil is Betula platyphyllaforest grasses(127.33 t·hm^(-2))< Larix gmelinii forest grasses(135.81 t·hm^(-2))< Populus simonii forest grasses 202.01 t·hm^(-2).

关 键 词：南瓮河自然保护区 林分土壤 物理性质 水文效应 

分 类 号：S715[农业科学—林学]