内蒙古四子王旗带状柠条林根系体积空间分布特征  

Spatial Distribution Characterstics of Root Volume of Caragana spp. and Grass Compound Model at Siziwang Banner in Inner Mongolia

作　　者：德永军[1] 安慧君[1] 赵翠平[2] 叶冬梅[1] 刘美[2] 

机构地区：[1]内蒙古农业大学林学院,呼和浩特010019 [2]四子王旗林业局,内蒙古四子王旗011800

出　　处：《内蒙古大学学报（自然科学版）》2009年第5期589-594,共6页Journal of Inner Mongolia University：Natural Science Edition

基　　金：内蒙古自然科学基金资助项目(200607010309)

摘　　要：在内蒙古四子王旗采用挖掘法对不同带间距柠条林地灌草根系体积的空间分布特征进行研究，结果表明：带间灌草根系体积水平分布为全部根系与直径≥0．5mm根系分布特征相似；直径≤0．2mm根系对全部根系分布特征的影响在近柠条带1．5m之内，对16m带间距林地的影响在2．0m之后，且呈波状变化；根系体积垂直分布总体上随着土层的加深而减少，随着带间距的加大表土层根系逐渐增加；5m带间距时遵从y=ae^bx函数关系，10m、16m带间距时遵从Y=aLn（z）＋6函数关系．16m带间距林地根系水平分布相对均匀，垂直分布在0～20cm土层比例较大，是比较适合该地区的灌草复合林地．The spatial distribution characteristics of root volume in Caragana spp. and grass compound model with different spacing was studied using a digging method. The results showed that the horizontal distribution characteristics of all roots was similar with that of roots which diameters are more than or equal to 0.5 mm. The effect of roots （D≤0. 2 mm） on the horizontal distribution characteristics of whole roots was mainly in a distence of 1.5 m near the Caragana spp. with the belt spacing of 5 m and 10 m,but the effect range was out of 2.0 m and undulation in the model with spacing of 16 m. The volume of roots decreased with soil depth. The volume of roots in 0 20 cm soil increased as the increasing of the Spacing length. The relation of root volume and the spacing length could be expressed by function y-=ae^bx for the model with spacing of 5 m,and the function was y=aLn（x）＋b for the model with spacing of 10 m or 16 m. The root distributed relatively even in model with spacing of 16 m and the root vertical distribution was mainly in the depth of 0-20 cm. 16 m is a suitable spacing for the Caragana spp. and grass compound model at Siziwang Bnner county.

关 键 词：带状柠条林 根系体积 空间分布 灌草复合 四子王旗 

分 类 号：Q948[生物学—植物学] S728.3[农业科学—林木遗传育种]