福寿林场杉木人工林水源涵养功能比较研究  

Comparative study of water conservation function of Chinese fir plantation in Fushou forest farm

作　　者：李际平[1] 李沛霖[1] 曹小玉[1] 赵春燕[1] 袁晓红[1] 

机构地区：[1]中南林业科技大学林学院,湖南长沙410004

出　　处：《中南林业科技大学学报》2014年第7期80-83,129,共5页Journal of Central South University of Forestry & Technology

基　　金：国家自然科学基金项目"生态公益林人工纯林多功能结构优化技术研究与示范"(2012BAD22B0505)

摘　　要：以福寿林场作为研究区域,将杉木人工林按龄组划为幼龄林、中林龄和近熟林,采用标准地调查的方法、环刀法和烘干法对杉木的幼龄林、中龄林、近熟林的土壤物理性质以及水源涵养功能进行研究。结果表明:不同林龄杉木类型土壤容重为上层小于下层,土壤容重为中龄林(1.44 g/cm3)>近熟林(1.37 g/cm3)>幼龄林(1.36g/cm3);不同林龄杉木类型土壤毛管孔隙度随土壤厚度增加而减小,毛管孔隙度为幼龄林(30.32%)>中龄林(17.26%)>近熟林(14.41%);土壤非毛管孔隙度随土壤深度的增加无明显变化,非毛管孔隙度为近熟龄(36.66%)>中林龄(28.61%)>幼龄林(18.55%);根据土壤蓄水能力的大小,可以得出涵养水源能力的大小为近熟林(107.74t/hm2)>中龄林(81.24 t/hm2)>幼龄林(57.43 t/hm2);随着杉木林龄的增大,水源涵养功能呈增大趋势。By taking Fushou Forest Farm as the studied area, the Chinese fir plantations in the farm were divided by age group into young-aged forests, middle-aged forests and near-mature forests. The soil physical characteristics and water conservation functions of the three age-level forests were investigated by adopting standard plot survey method, cutting ring method and oven drying method. The results are as follows： the upper layer of soil bulk density of the three types of Chinese fir were less than that of the lower,and the soil non-capillary porosity decreased with the increase of the soil depth. The average soil bulk density of the three types of Chinese fir arranged in magnitude order; middle-aged forests（1.44 g/cm3）〉near-mature forests（1.37 g/cm3） 〉 young-aged forests（1.36 g/cm3）; the soil capillary porosity rates of the three types of Chinese fir sequenced by magnitude： young-aged forests（30.32%） 〉 middle-aged forests（17.26%） 〉 near-mature forests（14.41%）; the soil non-capillary porosity of the three types of Chinese fir ordered from big to small： near-mature forests（36.66%） 〉 middle-aged forests（28.61%） 〉 young-aged forests（18.55%）. According to the soil water storage capacity, the outcome of the water conservation capacity lined from high to low： near-mature forests（107.74 t/hm2）〉 middle-aged forests（81.24 t/hm2）〉 young-aged forests（57.43 t/hm2）. Along with the increase of the Chinese fir＇s age, the water conservation showed an increasing tend as well.

关 键 词：杉木人工林 水源涵养功能 毛管孔隙度 非毛管孔隙度 

分 类 号：S715.7[农业科学—林学]