六盘山华北落叶松人工林地土壤水分动态研究  

Dynamics of Soil Water Under Larix principis-rupprechtii Plantation in the Liupan Mountains

作　　者：杨民益 杜阿朋[2] 王彦辉[3] 

机构地区：[1]宁夏回族自治区固原市原州区林业局,宁夏固原756000 [2]国家林业局桉树研究开发中心,广东湛江524022 [3]中国林业科学研究院森林生态环境与保护研究所,北京100091

出　　处：《水土保持研究》2009年第6期129-133,共5页Research of Soil and Water Conservation

基　　金：国家自然科学基金项目(40730631;40671038;30671677);科技部"十一五"科技支撑计划项目课题(2006BAD03A1803);科技部社会公益研究专项(2004DIB3J102);中国林科院中央级公益性科研院所基本科研业务费专项资金(CAFYBB2007038;CAFRIF200702);国家林业局森林生态环境重点实验室资助

摘　　要：利用平衡式张力计和时域反射仪(TDR)定位监测方法,研究了六盘山山地华北落叶松人工林地土壤水分动态规律。结果表明:研究时段内,华北落叶松林内土壤水分时间动态变化可划分为土壤水分的相对湿润期、持续消耗期和快速恢复期;依据水分利用特征可将垂直土层划分为土壤水分的微弱利用层(0-20cm)、利用层(20-60cm)和水分调节层(60cm以下)。华北落叶松林内0-60cm各土层土壤蓄水量与太阳辐射、大气温度、VPD和液流通量均呈极显著相关(P<0.01),对各因子进行多元逐步回归分析,得到0-60cm各土层土壤蓄水量与气象因子间的多元线性回归方程。By using Equi tensiometer and time domain reflectmetry （TDR）, a fixed--position monitoring was made on the dynamic characteristics of soil water under Lariat principis--rupprechtii plantation in the Liupan Mountains. The results showed that the dynamics of soil water could be described as relatively wetness period, durative consuming period and fast accumulating period. According to soil water utilizing character, the vertical soil water dynamics with soil depth can be divided into 3 layers： faintness--utilizing layer （0--20 cm）, mostly--utilizing layer （20--60 cm） and adjusting layer （below 60 cm）. Significant correlations existed between soil water storage and meteorological factors as the solar radiation, air temperature, vapor pressure deficit （VPD） and the sap flow flux（P〈0.01）. Carries on the multi-dimensional gradually regression analysis to various factors, the multi-dimensional equation of motion between the 0--60 cm various soil layers soil water--holding capacity with the meteorological factor was obtained.

关 键 词：六盘山 华北落叶松 土壤水分 土壤蓄水量 

分 类 号：S152.7[农业科学—土壤学] S724[农业科学—农业基础科学]