生态环境学报Issue(11)：1831-1836,6.DOI:10.16258/j.cnki.1674-5906.2015.11.012
稀土矿废弃地不同植被恢复模式对土壤肥力的影响
Effect of Different Revegetation Model on Soil Properties in Abandon Mine Area of Rare Earth
摘要
Abstract
To screen the best vegetation restoration model in ionic-rare-earth ore mining abandoned land, In this study, we took different vegetation restoration modes that were established in the abandoned land of rare earth ore in 2007 as research object. The optimal vegetation restoration mode for ion-type abandoned land of rare earth ore in Southern China was identified based on the analysis of physical and chemical properties of soil that was conducted in 2012. The vegetation restoration mode mainly consists of high-adaptive local species, such asPaspalum wettsteinii,Lespedeza bicolor,Schima superba,Liquidambar formosana,Michelia macclurei,Elaeocarpus sylvestris,Camellia oleifera, andthe planting pattern followed grass-shrub-arbor style. Ten 10 m×10 m plots each trial site were arranged in waste ponds of heap-leaching mine area and rented earth pits of abandoned land of rare earth ore in Changting in 2012 and the physical and chemical properties of soil was analyzed. In the mean time, five soil profiles were dug using 10 cm×10 cm×10 cm white tin in each trial site for composition analysis of soil water stable aggregates. Furthermore, we also used membership function method to evaluate soil fertility in various vegetation restoration modes. The results showed that the physical and chemical properties of soil significant varied between different vegetation restoration modes in waste ponds of heap-leaching mine area and rented earth pits. After vegetation restoration, the pH value, bulk density decreased and other indexes increased to some extent in rented earth pits. The soil bulk density and hydrolytic nitrogen decreased in waste ponds of heap-leaching mine area which is different from rented earth pits; however, other indexes increased in waste ponds of heap-leaching mine area . In addition, our findings indicated that there were significant differences in soil fertility of different vegetation restoration modes. The fertility index of the Paspalum wettsteinii+Lespedeza+Schima superba+Liquidambar+Elaeocarpus sylvestris mode reached 0.544, showing a good effect in soil improvement and a suitable mode for vegetation restoration in rented earth pits of rare earth ore in Changting; the fertility index of the Paspalum wettsteinii+Lespedeza+Schima superba+Liquidambar+Eucalyptus grandis mode was 0.472 which has the best effect on soil improvement and represented the best vegetation restoration mode in waste ponds of heap-leaching mine area of rare earth ore in Changting.关键词
稀土矿/废弃地/土壤理化性质/土壤肥力/植被恢复模式Key words
rare earth mine/abandon mine/soil physical-chemical properties/soil fertility/revegetation model分类
农业科技引用本文复制引用
王友生,吴鹏飞,侯晓龙,岳辉,彭绍云,马祥庆..稀土矿废弃地不同植被恢复模式对土壤肥力的影响[J].生态环境学报,2015,(11):1831-1836,6.基金项目
国家林业局林业公益性行业科研项目（201304303）；国家公益性行业科研专项（201111020-2）；福建省产学合作科技重大项目（2013N5002）；福建农林大学林学院青年基金项目 （）
