气化渣复配沙土对苜蓿生长及其越冬返青的影响

Effects of Gasification Slag Mixed with Sandy Soil on the Growth of Alfalfa and Its Green after Winter

新时期环保高质量发展迫使煤化工固体废弃物的综合利用成为当前亟待解决的课题。本文通过对比不同比例气化渣复配沙土对苜蓿生物学特征及越冬返青的影响,以期为气化渣生态化利用提供一定的科学依据。结果表明:(1)与CK相比,气化渣复配沙土处理的苜蓿株高增幅介于43.9%-56.5%,平均增幅为50.3%,其中处理15%苜蓿株高提升效果最好且达到显著性差异水平,增幅为56.5%,但随着气化渣施用量的增加,处理35%和45%的苜蓿株高逐渐降低;(2)与CK相比,气化渣复配沙土处理的苜蓿生物量增幅为14.6%-39.7%,平均增幅为28.5%,且均达到显著性差异水平,其中处理25%生物量最高,相较于CK增加了50.27%,处理15%次之,相较于CK增加了41.94%;(3)与CK相比,不同气化渣复配沙土处理的积温均有所提升,有效保证苜蓿的正常越冬,处理15%积温最高,相较于CK提高37.71%,与CK相比,处理25%返青率提升41.11%。因此气化渣复配沙土可以有效提高苜蓿返青率。

The high-quality development of environmental protection in the new era forces the comprehensive utilization of solid waste from the coal chemical industry to become an urgent issue.In this paper,the effects of different proportions of gasification residue mixed with sandy soil on the biological characteristics of alfalfa and its overwintering and rejuvenation were compared to provide a scientific basis for the ecological utilization of gasification residue.Compared with CK,the plant height of alfalfa treated with gasification residue mixed with sand increased by 43.9%~56.5%,with an average increase of 50.3%.Among them,15%treatment had the best effect on alfalfa plant height improvement and reached a significant difference level,with an average increase of 56.5%.However,with the increase of gasification residue application,the plant height of alfalfa treated with 35%and 45%decreased gradually.Compared with CK,the biomass of alfalfa treated with gasification residue mixed with sandy soil increased by 14.6%~39.7%,with an average increase of 28.5%,and reached a significant difference level.The biomass of 25%treatment was the highest,increased by 50.27%compared with CK,followed by 15%treatment,increased by 41.94%compared with CK.Compared with CK,the accumulated temperature of different gasification slag combined with sand treatment was improved,effectively ensuring the normal overwintering of alfalfa.The accumulated temperature of 15%treatment was the highest,37.71%higher than CK,and 41.11%higher than CK in 25%treatment.Therefore,the gasification residue combined with sand can effectively improve the accumulated temperature and the green rate of alfalfa.