摘要
采用室内光照培养法(光温自动控制的光照培养箱),研究沙质土壤中施加燃煤烟气脱硫镁渣(以下简称脱硫镁渣)对沙冬青(Ammopiptanthus mongolicus)种子萌发及幼苗生长的影响。结果表明:脱硫镁渣对种子萌发、幼苗出土和幼苗根系生长有显著的抑制作用;施用脱硫镁渣对幼苗的单株鲜/干重、总生物量及茎生长有显著的促进作用。与对照相比,在种子萌发到幼苗建成的整个过程中,当脱硫镁渣施用量在5～15 g/kg时,种子萌发率和幼苗出土率显著降低,幼苗生物量显著提高;脱硫镁渣施用量小于5 g/kg时,对于种子萌发和幼苗生长均无显著影响;施用量大于15 g/kg,单株干重、鲜重、生物量和幼苗茎生长均极显著增加,种子萌发率和幼苗出苗率极显著降低。
In this paper,the effects of applied desulphurization magnesium slag from flue gas to sand on seed germination and seedling growth of Ammopiptanthus mongolicus were researched using the indoor illuminating incubator.Five different fertilizer rates（i.e.0,5,10,15,20 grams of desulphurization magnesium slag per 1 kilogram sand） were designed to observe the effects of applied desulphurization magnesium slag on germination energy,seeding index,germination rate,emergence percentage,emergence fresh or dry weight per plant,total biomass and growth of seedling stems and roots of A.mongolicus.The results show that desulphurization magnesium slag application had the effects on seed germination and seedling growth.Desulphurization magnesium slag restricted significantly the seed germination,seedling emergence and seedling root growth,and the restriction increased with increasing the application rates.Application of desulphurization magnesium slag promoted significantly the seedling fresh or dry weight per plant,total biomass and seedling stem growth,and this effect was increased with increasing the application rate.In the whole process from seed germination to seedling growth,seed germination and seedling emergence were significantly decreased when the application rate ranged from 5 to 15 g/kg compared with the control,but seedling biomass was significantly increased.When the application rate was lower than 5 g/kg,there was no significant effect on seed germination and seedling growth.When the application rate was higher than 15 g/kg,seed germination and seedling emergence were decreased very significantly,while seedling fresh or dry weight per plant,total biomass and seedling stem growth were increased very significantly.
出处
《干旱区研究》
CSCD
北大核心
2011年第6期1031-1037,共7页
Arid Zone Research
基金
自治区科技支疆项目(094D051001)资助
