不同生境对踏郎生长及土壤养分空间差异的影响  

Effects of Site Condition on Growth and Spatial Variations of Hedysarum Laeve

作　　者：杨东华[1] 赵雨森[1] 

机构地区：[1]东北林业大学林学院,哈尔滨150040

出　　处：《林业科学》2011年第2期180-186,共7页Scientia Silvae Sinicae

基　　金：黑龙江省"十一五"重大科技攻关项目(GA06B302-2)

摘　　要：踏郎（Hedysarum fruticosum）,又称羊柴、山花子、山竹子、油葫芦稍,豆科岩黄芪属。踏郎是一种优良的保土固沙灌木,具有很强的根蘖能力,常＂一株成林＂,是优良的固沙造林植物种,大部分分布在我国内蒙和西北地区的固定、半固定沙丘上,而在内蒙古大面积的半流动沙地上和流动沙地的附近也有分布,用其固定沙丘（柏玉珍,1989）。The effects of slope position on growth and nutrient status were investigated in the artificial wind-breaking and sand-fixing forest of Hedysarum Laeve（6 a） in semi-mobile dune of Horqin sandy land by comparing with natural abandoned land（the department with 50 m adjaceut in same slope）.Results showed that：slope affacted the growth status significantly.The height,numbers,canopy density,coverage density,survival rate in downhill were higher than those in uphill and midslope,and ground diameter in upslope was higer than downslope and midslope.The growth status in downhill and uphill was better than midhill.In the downhill,average height was 79.01 cm,plant density was 64 567 hm-2,canopy density was 0.253,coverage was 0.314,and survival rate was 82.43 %.Organic matter and hydrolyzable nitrogen in the soil depth of 40 ～ 60 cm were influenced obviously the slope and the values were higher in downhill,respectively being 0.38 % and 20.5 mg.kg-1.The roots of Hedysarum Laeve mainly distributed in that region.However,the content of available potassium and available phosphorus was lower in the well growth condition.The comprehensive evaluation of the growth and nutrient status of Hedysarum Laeve in different position of slope was that downhill was the best,next came uphill and midhill in sequence.

关 键 词：科尔沁沙地 踏郎 生境 人工林 土壤养分 

分 类 号：S727.23[农业科学—林木遗传育种]