【摘要】 [目的]解决陕北沙区煤矸石废弃地占地面积大,植被恢复困难和治理造价高的问题。[方法]利用野外试验,设计半隐蔽沙蒿沙障(2m×2m)下的3种覆沙厚度(30,50和70cm)共3种类型的处理。4种乡土灌木树种沙地柏(Sabina chinensis)、长柄扁桃(Amygdalus pedunculata)、紫穗槐(Amorpha fruticosa)和蒙古莸(Caryopteris mongholica)进行对比试验。[结果]成活率、保存率、新稍生长量和地径变化随着覆沙厚度的增加,其指标均有所提高;多因素方差分析表明种间存在极显著差异,在0.05的显著水平下,紫穗槐与其它植物种均存在显著差异,蒙古莸与沙地柏间存在显著差异;在0.01显著水平下,蒙古莸、长柄扁桃和沙地柏间差异性不显著;覆沙30cm与覆沙50cm,覆沙70cm间均存在显著差异,覆沙50cm和覆沙70cm间差异性均达不到显著水平。[结论]综合因素条件下,覆沙50cm是该区域煤矸石山土地复垦及生态恢复植被需要基质的最佳选择。更多还原

【Abstract】 [Objective]To solve the issues of large coal gangue waste land area and high cost in vegetation restoration in sandy area of Northern Shaanxi Province.[Methods]Three sand thickness(30,50 and 70cm)and a semi-covered Artemisiasand barrier(2m×2m)were set.Four different kinds of native shrub species including Sabina chinensis,Amygdalus pedunculata,Amorpha fruticosa and Caryopteris mongholica were selected for the experiments.[Results]The survival rate,saving rate,the amount of new growth and diameter had improved due to the increase of sand thickness.Multi-factor variance analysis showed that there were significant differences among different species.Significant differences were found between A.fruticosa Linn and other types,and between C.mongholica Bunge and S.vulgaris(p<0.05).There were no significant difference between C.mongholicaBunge,A.pedunculataPall and S.vulgaris(p<0.01).There were significant differences among the 30,50 and 70cm sand thickness,and there were no significant differences between 50 cm and 70 cm sand.[Conclusion]With the consideration of all factors,a sand thickness of 50 cm is optimal in land reclamation and ecological restoration in the coal gangue waste land.更多还原