【摘要】 为了探讨磷矿粉和糠醛渣不同配比对沥青拌合站回收粉改良为园林绿化用土的效果及其最优配比，采用黑麦草盆栽试验，研究磷矿粉和糠醛渣分别占回收粉干重10%、15%、20%和1%、3%、5%、10%添加比例组合的12个配比处理和1个未添加对照处理对回收粉养分、酶活性和黑麦草长势的影响。研究结果表明：与未添加对照处理相比，磷矿粉和糠醛渣不同配比处理均显著降低了回收粉pH，最大降幅达9.85%，改善了回收粉养分状况；提高了黑麦草旺长期回收粉脲酶、蔗糖酶、过氧化氢酶和磷酸酶活性，平均增幅达63.66%；提升了黑麦草植株鲜重、根尖数、总根长、根直径、总根表面积、总根体积，平均增幅分别达47.04%、57.98%、57.97%、2.25%、68.13%、87.61%。根据主成分综合得分，磷矿粉10%、15%和20%与糠醛渣1%三个配比处理在改善回收粉养分、酶活性和促进黑麦草生长方面均具有显著的改良效应。因此，在本试验条件下，磷矿粉10%与糠醛渣1%为沥青拌合站回收粉改良为园林绿化用土最优的物料配比。更多还原

【Abstract】 To investigate the effects of different mixing ratios of phosphate rock powder(PRP) and furfural residue(FR) on the improvement of recycled powder from asphalt mixing plants(RPAMP) for use as landscaping soil, as well as to determine the optimal mixing ratio, this study conducts a ryegrass pot experiment. It examines the effects of 12 proportion treatments with PRP and FR accounting for 10%, 15%, 20% and 1%, 3%, 5%, 10% of the recycled powder(RP) dry weight, respectively,as well as one control treatment with no additives, on the RP nutrients, enzyme activities and ryegrass growth performance. The results show that compared with the control treatment without any additives, all treatments with different ratios of PRP and FR significantly reduce the RP pH, with the maximum decrease of 9.85%, thereby improving RP nutrient status. These treatments also enhance the activities of urease, sucrase, catalase and phosphatase in RP during the vigorous growth stage of ryegrass, with an average increase of 63.66%. Additionally, they promote the fresh weight of ryegrass plants, the number of root tips, total root length, root diameter, total root surface area and total root volume of ryegrass, with increases of 47.04%, 57.98%, 57.97%, 2.25%, 68.13% and 87.61% on average, respectively. According to the comprehensive score of principal components, the three ratio treatments of 10%, 15% and 20% PRP combined with 1% FR all have significant improvement effects in enhancing the nutrients and enzyme activities of RP and the growth of ryegrass. Therefore, under the experimental conditions of this study, the optimal material ratio for amending recycled asphalt mixture into soil suitable for landscaping is 10% PRP combined with 1% FR.更多还原