盐份浓度对碱茅草种子萌发的影响  

EFFECTS OF SALT CAACENTRATIONS ON THE SEED GERMINATION OF KAREANALKALGEAES

作　　者：沈禹颖[1] 闫顺国 余玲[1] 

机构地区：[1]甘肃草原生态研究所,兰州730020

出　　处：《草业科学》1991年第3期68-71,共4页Pratacultural Science

基　　金：国家自然科学基金委员会资助项目

摘　　要：碱茅种子在河西盐渍土提取液中萌发的结果表明,低于0.54g/100ml的盐度对种子萌发有促进作用,高于该浓度,萌发受到抑制直至完全停止。介于0.88g/100ml—3.60g/100ml间的盐度降低了种子发芽势和累积发芽率,胚根变短,但不影响其萌发潜势,解除盐份限制后,可继续萌发;高于3.64g/100ml的盐度不仅抑制种子萌发,并对其萌发潜势有明显影响。Seeds of korean alkaligrass (Puccinellia chinampoensis) were germinated on filter; a; er saturated with salt sloutions extracted from the saline soil in Hexi Corridor. Sixteen concentrations were tested. The seed germination was stimulatedat the concentrations of 0.54 g/100ml and below, dexreased at the concentrations higher than 0.72g/100ml.The germination rate and accumulated germination percentage were rekuced and the radicles were shortened at the concentrations from 0.88tl 3.60g/100ml, but the ungerminated seeds remained viable and germinated when the salt content was reduced. However, the final germination percentage and the germination potentialwere both reduced at the concentrations higher than 3.64g/l—ml.

关 键 词：碱茅草 种子 萌发 盐浓度 盐渍环境 

分 类 号：S543.901[农业科学—作物学]