燃煤烟气脱硫镁渣的保水性及对2种种子萌发的影响

Water Retaining Property of Desulphurization Slag of Magnesium from Flue Gas and Its Influence on Two Species' Seed Germination

通过室内光照培养试验,分别测定施加7种不同比例燃煤烟气脱硫镁渣的混合物的保水性及对蒙古沙冬青(Ammopiptanthus mongolicus)和红花锦鸡儿(Caragana rosea)的种子萌发、成活的影响。结果显示:随混合物中脱硫镁渣比例增加,种子初始萌发时间有不同程度滞后;纯脱硫镁渣对植物种子萌发有抑制作用,当混合物中脱硫镁渣比例在6.73～12.49 g·kg-1范围内时,种子萌发率、幼苗成活率均明显高于纯土壤;混合物中脱硫镁渣比例低于6.73 g·kg-1时,积极影响不显著,高于14.42 g·kg-1时,抑制作用显著。脱硫镁渣的保水性能明显大于土壤,其与土壤混合物的保水性随脱硫镁渣含量的增加而提高。

Through using indoor illuminating incubator, the water retaining property of different proportion of the mixture of the desulphurization magnesium slag from flue gas and its influence on the seed germination ＆ survive were determined. Result shows that ： with the increase of the proportion of the desulphurization magnesium slag in the mixture, the time of the initial germination lagged; the pure desulphurization magnesium slag constrain the seed germination ; when the proportion of the desulphurization magnesium slag in the mixture at the range of 6.73-12.49 g ·kg-1 , the seed germination ＆ seedling survive rate are remarkable higher than that in the pure soil matrix;when the proportion of the desulphurization magnesium slag in the mixture are lower than 6.73 g ~ kg-1 , the positive impact is not significant;when the proportion of the desulphurization magnesium slag in the mixture are higher than 14.42 g kg-1 , the inhibition are remarkable. Water retaining property of desulphurization magnesium slag is significant higher than that of pure soil matrix. With the increase of the proportion of the desulphurization magnesium slag in the mixture of soil and desulphurization slag of magnesium matrix, the water retaining property improved.