祁连山不同林龄青海云杉对灰褐土理化性质和水源涵养功能的影响

Effects of Qinghai Spruce Forest Different in Age on Soil Physico-Chemical Properties and Water Source Conservation Function of Grey Drab Earth in Qilian Mountains

对祁连山不同林龄青海云杉林灰褐土化验分析表明:土壤孔隙度、团粒结构、物理性黏粒、水分、渗透速度、渗透系数、有机质、全N、速效N、速效P、速效K、CEC均为成年林>幼年林>荒坡草灌。土壤体积质量(容重)、物理性砂粒、pH、CaCO3、全盐均为荒坡草灌>幼年林>成年林。随着林龄延长,CaCO3、可溶性盐都有不同程度的淋溶。不同处理间的差异显著性经LSR检验达到显著或极显著水平。

Test and analysis of the grey drab earths in the Qilian Mountains under Qinghai spruce stands different in age showed an order of grown-up forest>young forest>grassy and shrubby slope in soil porocity, granule structure, physical clay, moisture, permeation rate, permeation coefficient, organic matter, total N, readily available N, readily available P, readily available K, and CEC, and an order of grassy and shrubby slope> young forest>grown-up forest in soil bulk density, physical sands, pH, CaCO3-, and total salt. With the age of the stand, leaching of calcium carbonate and soluble salts was intensified to a varying degree. The differences between treatments were significant and extremely significant by LSR.