水分胁迫条件下不同肥水类型小麦抗旱特性的研

华北农学报 20 10, 25 ( 6) : 2052 10 张雅倩, 林 琪, 姜 雯, 刘义国, 李玲燕 ( , 266109) : , 6, 6000( PEG6000) , , , , , 6 5034 21, , , , , : ; ; ; : S512. 01 : A : 1000- 7091( 2010) 06- 0205- 06 Droughtresistance Characteristics of D ifferent Fertilizer and W ater Types ofWheat underWater Stress ZHANG Y aqia , LIN Qi, JIANG W e , LIU Y iguo, L I Li gya (K ey Laboratory ofDry La d Farm i g Tech ique, Q i gdaoAgricu lturalU iversity, Q i gdao 266109, Chi a) Abstract: The seed germ i atio status a d physiological a d biochem ical cha ges ofw heat seedli gs of six d iffer e t fertilizer a dw ater types ofw heatwere studied u der thew ater stress ofPEG6000, a d the drought resista ce was ide tified u der the co d itio of trough cu ltivatio w ith rai proof shelter. The resu lts showed that the le gth of cole optiles, relative germ i atio rate a d itrate reductase activity decreased, the soluble sugar co te t a d MDA co te t i creased, the root activity revealed a appreciably i creasi g te de cy a d the decli ed w ith the w ater stress tmi e. Comparedw ith irrigated field cultivars, the le gth of coleoptiles, relative germ i atio rate, itrate reductase activity a d the root activity of dry la d cu ltivars Q i gmai 6, Jiha 5034 a d Lumai 21w ere relatively higher a d decreased more slow ly, the soluble sugar co te tw as higher a d its growth ra gew as larger alo g w ith the stress tmi e, MDA co te t i creased comparatively slow ly. The le gth of coleoptiles, relative germ i atio rate, itrate reductase activity a d root activity had a extremely sig ifica t relatio w ith droughtresista ce i dex, wh ich cou ld be co sidered as early. K ey words:Whea;tW ater stress; Droughtresista ce characteristics; Fertilizer a d water types 20, , ,