几种植物在稀土尾砂基质上的抗旱力比较

以稀土尾砂为基质,在盆栽条件下对南方几种常用的复绿草种进行了干旱胁迫对植物生长影响的试验,试验时间135天。结果表明,干旱胁迫对不同草种生物量影响有一定差异,干旱胁迫3周处理与对照的生物量(干重)之比为:百喜草(0.92)>白三叶(0.83)>狼尾草(0.81)>弯叶画眉草(0.8)>狗牙根(0.72)>高羊茅(0.7),干旱对百喜草生物量的影响最小,其次是白三叶、狼尾草和弯叶画眉草,对高羊茅生物量的影响最大。干旱胁迫下叶片卷曲形态观测表明,百喜草受影响最小,其次是弯叶画眉草,狼尾草、高羊茅、狗牙根和白三叶受影响最大。综合比较,百喜草的抗旱力最强,其次为弯叶画眉草,可作为可能遭受较长时间伏旱影响的南方地区矿山废弃地植被恢复的理想种类。

Several Plants in Rare Soil Tailings Matrix on Drought Resistance Comparison

Rare soil tailings as matrix,in the pot under the conditions of several common complex on the South green grasses to drought stress on plant growth and impact test,test time 135 days.The results show that,drought stress on different species biomass effect there are certain differences,drought stress 3 weeks of treatment and control of biomass(dry weight) is: Bahia grass(0.92) > White Clover(0.83) > Pennisetum(0.81)> Pennisetum Eragrostis grass(0.8) > Bermudagrass(0.72) > Tall Fescue(0.7),drought on grass biomass minimal effects,followed by White Clover,and Pennisetum Eragrostis curvula,on Tall Fescue biomass affected.Leaf under drought stress crimp morphology observation suggests,were least affected,followed by the Lovegrass,Pennisetum,tall fescue,bermudagrass and white clover affected most.Comprehensive comparison,Bahia grass drought resistance was the strongest,followed by the Lovegrass,as may suffer longer drought affected South Mine Wasteland vegetation restoration of the ideal types.