草业学报2025，Vol.34Issue(3)：71-84,14.DOI:10.11686/cyxb2024195
粒径配比、施肥量以及播量耦合对矿区煤矸石基质的改良效果
Effect of particle size ratio,fertilizer application amount,and seeding rate combinations coal gangue matrix properties in restoration of a mining area
摘要
Abstract
Coal gangue,a solid waste produced from mining activities,has a poor physical structure,making the nutrients it contains inaccessible to plants.Therefore,improving the matrix properties of coal gangue is crucial in the ecological restoration of mining areas.This study utilized an L9(34)orthogonal design to investigate the combined effects of:(A)coal gangue particle size ratio<7 mm(0%,25% or 50% ),(B)organic fertilizer application amount(15+7.5,30+15 or 45 m3·ha-1+22.5 t·ha-1 sheep manure+commercial organic fertilizer),(C)slow-release urea application amount(30,60 or 90 kg·ha-1),and(D)seeding rate(60,120,or 180 kg·ha-1),on above-ground vegetation and soil nutrients.The optimal improvement model was selected using TOPSIS multivariate analysis.The findings revealed that over time,the above-ground biomass and soil nutrient levels decreased across different treatments.Specifically,soil organic matter,total nitrogen,total phosphorus,available nitrogen,available phosphorus,and available potassium decreased significantly,while total potassium showed a notable increase.Range analysis indicated that the application rate of slow-release urea and seeding rate were critical for above-ground biomass,whereas the particle size ratio<7 mm and organic fertilizer amount were key factors for soil nutrient content.A comprehensive TOPSIS analysis based on above-ground biomass and soil fertility indicators identified the T2(A1B2C2D2)treatment as the most effective,comprising 0% of coal gangue with a particle size ratio<7 mm,30 m3·ha-1 of sheep manure+15 t·ha-1 of commercial organic fertilizer,60 kg·ha-1 of sustained-release urea,and a seeding rate of 120 kg·ha-1.The results of this study offer valuable insights for ecological restoration in the Muli mining area.关键词
煤矸石/基质改良/地上生物量/土壤养分/综合评价Key words
coal gangue/substrate improvement/above-ground biomass/soil nutrients/comprehensive evaluation引用本文复制引用
马利利,蒋福祯,马玉寿,祁凯斌,贾顺斌,李正鹏..粒径配比、施肥量以及播量耦合对矿区煤矸石基质的改良效果[J].草业学报,2025,34(3):71-84,14.基金项目
国家重点研发计划项目(2021YFC3201605)和青海省自然科学基金青年项目(2023-ZJ-987Q)资助. （2021YFC3201605）
