不同粒径石灰岩弃渣客土改良效果分析

发布时间：2018-05-03 15:05

本文选题：粒径区分 + 弃渣改良　；参考：《中国水土保持科学》2017年03期

【摘要】：生态环境的保护与治理是目前世界关注和研究的重点,以石灰岩弃渣为研究对象,重点解决目前工程弃渣改良利用客土施用量大的难题。为了获取不同粒径区间弃渣混合客土改良的最优比例,试验选取北京房山石灰岩采石场弃渣,筛分成4种粒径区间,并按比例混合客土,撒播高羊茅种子,进行盆栽试验。通过测定不同配比弃渣的密度、孔隙度、毛管持水量和最大持水量,以及高羊茅植株的保存率、生长高度、生物量和根茎比,获取添加不同比例客土的改良效果和高羊茅生长状况。结果显示:客土改良石灰岩弃渣的影响体现需要一定的灌溉沉降过程,不同粒径弃渣土壤水分性质受客土添加量影响,相关性顺序为20~40 mm10~20 mm2 mm2~10 mm,高羊茅在不同粒径弃渣生长受客土添加量的影响,其相关性影响顺序为2 mm2~10 mm10~20 mm20~40 mm,客土最适添加比例为2 mm和2~10 mm粒径弃渣添加40%,10~20和20~40 mm粒径弃渣添加60%。研究结果可为不同粒径石灰岩弃渣资源化利用及客土改良,提供理论和数据参考。
[Abstract]:The protection and treatment of ecological environment is the focus of the research in the world at present. Taking limestone and slag as the object of study, the problem of large amount of application of waste slag in engineering improvement and utilization of guest soil is solved. In order to obtain the optimum proportion of mixed soil with different particle size, the experiment selected abandoned slag from limestone quarry in Fangshan, Beijing, and sifted it into 4 particle size intervals, and mixed the soil in proportion and sown the seeds of tall fescue, and carried out a pot experiment. The density, porosity, capillary water holding capacity and maximum water holding capacity were measured, and the storage rate, growth height, biomass and rhizome ratio of tall fescue plants were measured. The improvement effect of different proportion of Hakka soil and the growth status of tall fescue were obtained. The results show that the effect of improved limestone slag on the soil quality depends on the irrigation settlement process, and the moisture properties of the soil with different particle sizes are affected by the amount of soil added. The correlation order was 20 ~ 40 mm10~20 mm2 mm2~10. The growth of tall fescue in different particle size was affected by the addition of soil. The order of correlation is 2 mm2~10 mm10~20 mm20~40, and the optimum addition ratio is 2 mm and 2 ~ 10 mm respectively. The results can provide theoretical and data reference for resource utilization and soil improvement of limestone slag with different particle size.
【作者单位】：北京林业大学水土保持学院;
【基金】：林业公益性行业科研专项“建设工程损毁林地植被修复关键技术研究与示范”(200904030)
【分类号】：S156

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