苏北山丘区典型性次生林下土壤蓄水能力分析

次生林下土壤蓄水能力作为水源林生态系统的重要组成部分,是发挥森林水文生态功能的主体之一。研究采用"每木调查法",以苏北山丘区现存的赤松林、黑松林、侧柏林、栎类林、杂木林、刺槐林6种典型次生林作为主要对象,通过对林下植被土壤各个层面水文特性的研究,比较分析其林下土壤的蓄水能力。结果表明:6种次生林下土壤蓄水能力范围为280.8～451.2t/hm2,各次生林下土壤的蓄水能力与土壤容重呈负相关,与土壤毛管孔隙度呈正相关,其蓄水能力的大小顺序为:刺槐林>栎类林>杂木林>侧柏林>赤松林>黑松林。

Analysis on Soil Water Storage Ability in Typical Secondary Forests in Hilly Areas of Northern Jiangsu Province

As the important component of forest ecosystem,the soil water storage ability in secondary forests in hilly areas plays the main role in the part of ecological function of forest hydrology.This study adopted the way of investigating every wood and took six existing typical secondary forests such as Red Pines,Black Forest,Platcladus,Oak Forest,Shaw,Robinia pseudoacacia Forest as the main research objects.Through the study of the hydrology characteristic in each layer of the soil in the forests,water storage ability of the soil in each forest was analyzed.It was turned out that soil water storage ability of those six secondary forest ranged between 280.8～451.2 t/hm2,the oder of the water storage ability is: Robinia pseudoacacia L Forest>Oak Forest>Shaw>Platycladus>Red Pines>Black Forest.