摘要
为了研究林地水源涵养功能,选择湘西北的八大公山自然保护区为研究区域,采用野外观察与室内实验相结合的方法,分别对该区域具有代表性的阔叶林地,从灌草、枯落物、土壤3个层次水源涵养功能进行了定量分析。结果表明:(1)林地灌草持水量与其生物量呈正相关关系,与林地郁闭度呈负相关关系;(2)林地枯落物持水量与枯落物生物量呈显著正相关关系;(3)林地土壤容重随土层加深而增大,且表层变化幅度较大,随时间推移,容重呈减小趋势;林地土壤非毛管孔隙度随土壤深度变化与土壤容重基本相反,且各层明显高于撂荒地。以上研究结果表明,森林对土壤具有强大的保护及改良作用,此研究结论对于森林在改良土壤、美化环境等方面,尤其是在提升土壤涵养水源功能方面具有建设性意义。
In order to study water conservation function of forest in northwest Hunan,Badagong Mountain Nature Reserve was chosen as a research area and the method of combining field observations with laboratory experiments were adopted.The water conservation functions of a representative broad-leaved forest in the area on the three levels（shrub and grass level,litter level and soil level） respectively were quantitatively analyzed.The results show that（1） the forestland shrub grass layer’s water holding capacity was positively correlated with the biomass in the layer and negatively correlated with the forest canopy density in the level;（2） the forest litters layer’s water holding capacity litter biomass had a significant positive correlation with litter biomass;（3） Soil bulk density increased with the increase of soil depth,and the surface layer changed greatly,the bulk density decreased with the time passing;with the soil thickness change,woodland soil non-capillary porosity was basically opposite to soil bulk density,and each layers were apparently higher than the abandoned land.The above results indicate that the forest played a powerful role in the protection and improvement of the soil,the conclusion of this research has a constructive meaning for improving forest soil quality,beautifying environment and other aspects,especially for improving soil water conservation functions.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2014年第2期95-101,共7页
Journal of Central South University of Forestry & Technology
基金
2012年度湖南省高校创新平台开放基金项目“湖南省典型农业干旱区基本农田保护模式研究”(12K072)
关键词
林地
水源涵养
持水量
八大公山自然保护区
forest land
water resources conservation
water-retaining capacity
Badagong Mountain Nature Reserve
