子午岭次生林区土壤持水力及其与土壤有机碳的关系  

Soil Water Holding Capacity and Its Relationship to Soil Organic Carbon in Ziwuling Secondary Forest Region

作　　者：梁向锋[1] 赵世伟[1] 张亚莉[2] 赵勇钢[1] 华娟[1] 张扬[1] 

机构地区：[1]中国科学院水利部水土保持研究所 [2]陕西省黄陵县林业工作站,陕西黄陵727300

出　　处：《水土保持研究》2008年第3期15-19,共5页Research of Soil and Water Conservation

基　　金：国家“十一五”科技支撑计划课题(2006BCA01A07,2006BAD09B08)

摘　　要：通过野外调查和室内分析,就子午岭次生植被辽东栎、山杨、沙棘、狼牙刺、白羊草的土壤持水力及其与土壤有机碳含量的关系进行研究。结果表明,①植被间土壤持水力为:辽东栎>山杨>狼牙刺>白羊草>沙棘,除沙棘外,各植被土壤持水力和供水力随植被的正向演替而提高。②土壤比水容量即释水能力表现为乔木林大于灌木林和草地。③土壤水分特征曲线Gardner模型参数A、土壤有效水、土壤无效水含量与土壤有机碳含量有很好的相关性,相关系数分别达到0.83,0.80,0.79。In this paper,soil water holding ability and its relationship to soil organic carbon under five different Ziwuling secondary vegetations （ Quercus liaotungensis , Populus davidiana , Seabuckthorn, Sophora vicii f olia , Bothriochloa ischaemum ） were studied by means of laboratory research and field vegetation survey. The results were as follows：（1） Among the five vegetations the soil water holding capacity had the following order ： Quercus liaotungensis 〉 Populus davidiana 〉 Sophora viclifolia 〉Bothrlochloa ischaemum 〉 Seabuckthorn. Soil water holding capacity improved with vegetation succession except for Seabuckthorn. （2） The specific water capacity of soil showed as tree〉shrub〉grass. （3） The parameter A： soil available water and unavailable water all had a good correlation to soil organic carbon,and the correlation coefficient is up to 0.83,0.80 and 0.79 respectively.

关 键 词：土壤持水力 土壤有效水 子午岭次生林区 

分 类 号：S152.71[农业科学—土壤学] S153.61[农业科学—农业基础科学]