带状柠条林灌草根系质量空间分布格局  

SPATIAL DISTRIBUTION STRUCTURE OF ROOT MASS OF Caragana AND GRASS COMPOUND MODEL WITH DIFFERENT SPACING

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

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,乌兰花011800

出　　处：《内蒙古农业大学学报（自然科学版）》2009年第1期101-104,共4页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：内蒙古自治区自然科学基金(200607010309)

摘　　要：采用挖掘法对不同带间距灌草根系质量的空间分布格局进行研究,结果表明:全部根系与直径>0.5mm根系分布格局相似,直径≤0.5mm根系对全部根系分布格局的影响一般在近柠条带1.5m和0 cm^30 cm土层范围内,但在16m间距的影响1.5m之后;5m、10m带间距根系水平分布随远离柠条带而逐渐减少,遵从y=ax3+bx2+cx+d函数变化规律,16m带间距的呈波状变化;根系质量密度为16m间距>5m间距>10m间距;不同间距全部根系质量垂直分布随土层加深而逐渐减少,0 cm^10 cm土层根系质量与带间草本植物盖度呈正相关;5m带间距时遵从y=ae-bx函数的变化规律,10m、16m带间距时遵从y=aLn(x)+b函数的变化规律。The research is the spatial distribution structure of roots mass in Caragana and grass compound model with different spac- ing using digging. The results were as follows ：The distribution structure of all roots and roots（ D 〉 0.5mm） were similar; The effect of roots （ D ≤ 0.5 ram） on distribution structure is that the range in horizontal direction was 1.5 m and in vertical direction is 30cm, but the range in horizontal direction was out of 1.5m with 16m spacing distance; The horizontal distribution of 5m and 10m distance, was de- creased with the Caragana distance. The variation was like wave as distance is 16m; It could expressed by functiony = ax3 ＋ bx2 ＋ cx ＋ d when distance was 5m and 10m. The mass density of root system were： 16m 〉5m 〉 10re;The root mass of different spacing was de- creased with soil depth, The root mass in 0 - 10cm soil was in positive correlation with the vegetation coverage; It could expressed by function y = ae -bx when spacing distance was 5m, and the function was y = aLn（x） ＋ b with 10m and 16m.

关 键 词：带状柠条林 根系质量 空间分布 灌草复合 

分 类 号：S793.305[农业科学—林木遗传育种]