粉煤灰与煤矸石配比对苜蓿植株生长及其修复效果的影响

发布时间：2018-06-12 23:40

  本文选题：粉煤灰 + 煤矸石　； 参考：《河南农业科学》2017年11期

【摘要】：为探明苜蓿对煤矸石和粉煤灰栽培基质的修复效果,采用盆栽法,研究了粉煤灰与煤矸石不同配比对紫花苜蓿生长及基质p H值和电导率(EC)的影响。结果表明:T4∶6处理(下标数字表示粉煤灰与煤矸石质量比,下同)的苜蓿地上部、根系干质量最大,分别是T2∶8、T3∶7、T5∶5处理的1.24~2.73倍、1.30~1.98倍,植株地上部吸收N、P量也明显高于T2∶8、T3∶7、T5∶5处理,分别是其他处理的1.33~3.23倍、1.16~3.66倍;粉煤比对苜蓿地上部铜(Cu)、镉(Cd)吸收量有显著影响,T3∶7、T4∶6、T5∶5处理的Cu、Cd吸收量分别是T2∶8处理的2.47~3.42倍、1.75~2.46倍;T4∶6处理基质p H值接近中性,EC值较小,盐化程度较低,植物修复效果较好。研究表明,修复效果最佳的粉煤比为4∶6。
[Abstract]:In order to investigate the effect of alfalfa on the restoration of coal gangue and fly ash, the effects of different ratio of fly ash and coal gangue on alfalfa growth, pH value and electrical conductivity of alfalfa were studied by pot culture. The results showed that the root dry mass of alfalfa treated with the weight ratio of fly ash to coal gangue was the highest in the treatment of 1: T4: 6, which was 1.24 ~ 2.73 times and 1.30 ~ 1.98 times as much as that of treatment T2: 8, T3: 7 and T5: 5, respectively, when the weight ratio of fly ash to coal gangue was the same as that of T2: 8, T3: 7 and T5: 5, respectively. The amount of N P uptake in shoot was also significantly higher than that in the treatment of T2: 8: T3: 7 and T5: 5, which was 1.33 ~ 3.23 times as much as that of other treatments, and 1.16 ~ 3.66 times of that of other treatments. The ratio of powdered coal to alfalfa has a significant effect on the uptake of Cu (Cu), CD ~ (2 +) (CD ~ (2 +) in the aboveground part of alfalfa. The uptake of Cu ~ (2 +) in T _ (3: 7) T _ (4) O _ (4) O _ (6) and T _ (5): 5 treatment is 2.47 ~ 3.42 times of T _ 2: 8 and 1.75 ~ (2.46) times higher than that in T _ (4): 6 treatment respectively. The effect of phytoremediation is better. The results show that the best coal recovery ratio is 4: 6.
【作者单位】： 山西大同大学生命科学学院/设施农业技术研发中心;
【基金】：大同市科技攻关项目(2015099) 山西大同大学科研项目(2011K9);山西大同大学大学生创新项目(2015-XDC2015141) 国家自然科学基金项目(31400479) 山西省科技攻关项目(20150311010-1) 大同市基础研究项目(2015106)
【分类号】：S541.9
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本文编号：2011567