稀土尾砂坡地水分与植被恢复的空间变异性

Spatial Variability of Moisture and Vegetation Recovery on Rare Earth Tailing Slopeland

以江西定南县下庄稀土矿区废弃尾砂坡地为研究对象,对稀土尾砂坡地水分和弯叶画眉草生长状况的空间变异性进行了研究。结果表明:1总体上,尾砂水分沿坡长方向呈现出坡底>坡中>坡顶的趋势,不同坡向上表现为南坡>西坡>东坡的空间差异,但不同坡向之间水分含量不存在显著差异;2沿坡纵向,弯叶画眉草生物量总体上呈现坡中>坡底>坡顶的趋势,但不同纵向坡位生物量不存在显著性差异;3弯叶画眉草生物量与尾砂水分的相关性较差,尾砂水分的空间差异对其上植物生长的影响不显著;4弯叶画眉草生物量的空间差异性显著大于水分的空间差异性。

The spatial variability of moisture and growth status of Eragrostis curvula on rare earth tailing slopeland was studied in Xiazhuang rare earth mining area in Dingnan County of Jiangxi Province. Results show that： 1tailing moisture changes on the whole in the order of the bottom-slope the mid-slope the top-slope along the level direction,and southern slope western slope eastern slope in terms of the slope aspects,but there is no significant difference in moisture between different slope aspects; 2the biomass of Eragrostis curvula changes on the whole in the order of the mid-slope the bottom-slope the top-slope along the vertical direction,but there is no significant difference in biomass between different positions along the vertical direction; 3the correlation between the biomass of Eragrostis curvula and the moisture content is weak,showing that the spatial variability of moisture has no significant impact on biomass of Eragrostis curvula on rare earth tailing slopeland;4the spatial variability of biomass of Eragrostis curvula is significantly larger than that of moisture on rare earth tailing slopeland.