坡位对先锋树种改良排土场土壤肥力效果的影响

Effect of Slope Position on Soil Fertility of Fushun Pioneer Tree Species Improvement Dump

利用盆栽试验对抚顺市先锋树种进行优选,并将其应用于矿山废弃地的植被修复。以辽宁省抚顺市榆树铁矿和傲牛铁矿排土场的植被恢复区作为研究对象,在盆栽试验的基础上,结合矿山植被恢复区土壤基质的样本特性,研究不同坡位对先锋植被改良土壤肥力效果的影响。结果表明,通过盆栽试验,综合考虑盆栽苗的成活率、树高及胸径的生长变化情况,确定以2年生的樟子松和刺槐作为先锋树种,用于抚顺市榆树铁矿和傲牛铁矿的排土场进行植被修复;恢复期间,逐年测定土壤营养物质质量分数发现,土壤pH、有机质、全氮、碱解氮、速效磷和速效钾的质量分数随着恢复年限逐年升高,且各样地的不同坡位均表现为从坡上到坡底逐渐升高的变化规律。

It is the first time to use pot experiment to optimize the pioneer species of Fushun City and apply it to the vegetation restoration in abandoned mines.This article takes the vegetation restoration area of Yushu iron mine and Aoniu iron mine dump in Fushun City,Liaoning province is taken as the research object,based on the pot experiment,combining with the sample characteristics of the soil matrix in the vegetation restoration area of the mine,the effects of different slope positions on the soil fertility of pioneer vegetation were studied.Research indicates:through the pot experiment,in consideration of the survival rate,tree height and the growth and change of the breast diameter of the potted seedlings,the 2 years old of Pinus sylvestris and Locust were determined as pioneer tree species and used to repair the vegetation in the dump of Yushu iron mine and Aoniu iron mine respectively;during the recovery period,the content of soil nutrient content was determined year by year.The content of soil pH,organic matter,total nitrogen,alkali hydrolysable nitrogen,available phosphorus and available potassium increased year by year,and the different slope positions of the plots are characterized by the gradual increase of the slope from the slope to the bottom of the slope.