畦灌条件下樱桃树根系的空间分布特征  

Spatial distribution characteristics of cherry tree roots under border irrigation condition

作　　者：杨胜利[1] 刘洪禄[1] 郝仲勇[1] 吴文勇[1] 

机构地区：[1]北京市水利科学研究所,北京100044

出　　处：《农业工程学报》2009年第S1期34-38,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：北京市"十一五"重大科技课题(D0706007040191)

摘　　要：在对北京市永乐店农业节水灌溉试验站内的樱桃树根系进行详细调查的基础上,该文对樱桃树根系在根区范围内的空间分布特征进行了分析。结果表明,定植12a樱桃树的根系分布在以树干为中心250cm半径范围内,最大垂直深度为100cm。根系干质量、体积、表面积及根长各主要参数的总体分布是从表层开始随着土层深度的增加逐渐减少,从树干开始沿半径方向随着离树干距离的增加逐渐减少。根系各主要参数在各土层深度的分布百分比与其相应的土层深度均存在良好的指数相关关系。按照相关系数进行评价,相关程度按表面积(R2=0.9342)、根长(R2=0.9261)、体积(R2=0.9136)及干质量(R2=0.9050)的顺序逐渐减小。各采样单元内直径小于2mm的吸水根比例在35%～100%(平均68%)范围内分布。吸水根主要分布在以树干为中心200cm半径范围内,垂直方向从树干下方的60cm开始,逐渐减少到距树干水平200cm处的20cm左右,在树干周围半径为50cm和80～160cm范围是两个分布密集区。Based on the in-depth investigation of cherry tree roots grown in the Yongledian agricultural irrigation experimental station,the spatial distribution characteristics of the cherry tree root were analyzed in the scope of root.The results showed that the root of twelve-year-old cherry tree distributed in the area of 250 cm lateral distance from the main trunk and the depth of 100 cm.The root main parameters such as root length,volume,surface area and dry weight reduced with the increase of the depth and the lateral distance from the main trunk.It had a significant exponential regression relationship between the distribution percentage of every root parameter at every soil layer and its corresponding average depth,and the correlation coefficient of the root surface area,root length,root volume and root weight were 0.9342,0.9261,0.9136 and 0.9050,respectively.The fine roots(the diameter≤2 mm)distribute rate was about 35%-100%(average value was 68%).The main horizontal distribute region of fine roots are radius of 200 cm from the main trunk,and the main vertical distribute are 0-60 cm layer of main trunk place graduate into 0-20 layer where is 200 cm lateral distance from main trunk.The 0-50 cm and the 80-160 cm lateral distance from main trunk are two dense regions of fine roots.

关 键 词：畦灌 樱桃 根系分布 吸水根 

分 类 号：S662.5[农业科学—果树学]