文献类型：期刊文献

中文题名：共和盆地中间锦鸡儿人工林根系的分布特征

英文题名：Root System Distribution of Caragana intermedia Plantation in Gonghe Basin,Qinghai Province

作者：刘丽颖[1] 贾志清[1] 朱雅娟[1] 魏登贤[2] 杨德福[2] 赵雪彬[2]

第一作者：刘丽颖

机构：[1]中国林业科学研究院荒漠化研究所青海共和荒漠生态系统定位观测研究站;[2]青海省治沙试验站

年份：2012

卷号：32

期号：6

起止页码：1626-1631

中文期刊名：中国沙漠

外文期刊名：Journal of Desert Research

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：中国林业科学研究院林业研究所重点项目(ZD200908);林业公益性行业科研专项经费项目(201204203)共同资助

语种：中文

中文关键词：吸收根;输导根;根系生物量;比根长;根长密度

外文关键词：absorptive root; conductive root; root biomass; specific root length; root length density

分类号：Q944.54

摘要：采用剖面法对青海共和盆地中间锦鸡儿(Caragana intermedia)人工林的根系进行调查,分析5a、9a和25a根系的生物量、比根长和根长密度的垂直分布格局,同时测定土壤含水量的垂直变化。结果表明:①不同林龄中间锦鸡儿人工林的吸收根(d≤1mm)和输导根(d>1mm)的主要分布范围不同。5a、9a和25a吸收根主要分布土层分别是10～30、10～50cm和10～60cm,输导根主要分布土层分别是10～50、10～60cm和10～90cm。②随着林龄的增加,根系的吸收根、输导根的总生物量、总比根长和总根长密度均显著增加(P<0.05);各林龄根系中的吸收根比输导根具有更高的比根长和根长密度(P<0.05)。因此,吸收水分和养分的能力随着林龄增加而增大。③中间锦鸡儿人工林根系,尤其是吸收根的分布影响土壤水分变化,吸收根集中分布土层的土壤含水量显著降低。
The vertical distribution patterns of root biomass,specific root length（SRL） and root length density（RLD） of 5-year,9-year and 25-year Caragana intermedia plantations in Gonghe Basin of Qinghai Province was investigated with profile method,and soil water content in the soil profile was also measured.Results show that：（1） The absorptive roots（diameter≤1 mm） and conductive roots（diameter 1 mm） of C.intermedia in the three plantations are distributed in different soil layers.The absorptive roots of 5-year,9-year and 25-year Caragana intermedia plantations are mainly distributed in 10-30 cm,10-50 cm and 10-60 cm soil layers,respectively,whereas the conductive roots mainly appear in 10-50 cm,10-60 cm and 10-90 cm soil layer,respectively.（2） The total biomass,SRL and RLD of absorptive roots and conductive roots significantly increase with increase of plantation age（P0.05）.The SRL and RLD of absorptive roots are significantly higher than that of conductive roots（P0.05）.So,the absorbability of soil water and nutrition of C.intermedia increases with increase of plantation age.（3） Soil water content is affected by root system distribution,especially absorptive roots distribution.Soil water content in the concentrated areas of absorptive roots distribution is very low.