CAJ | 학술논문

为使旱区绿化植物科学配置及优化管理，利用不同浓度PEG‐6000的1／2Hoagland溶液模拟干旱胁迫，对美国石竹与荷兰菊种子萌发期的抗旱性进行比较。结果表明：当PEG‐6000浓度为5％时，荷兰菊（Aster novi‐belgii）与美国石竹（Dianthus chinensis cv ．American）总萌发率最高，分别为84％与83．3％，然后随着PEG‐6000浓度的升高，2种植物总萌发率均降低。2种植物胚芽长、苗鲜重、活力指数3项指标均随着PEG‐6000浓度的升高而降低，2种植物胚根长在PEG‐6000浓度10％处达到最高，然后逐渐降低。荷兰菊抗旱指数在PEG‐6000浓度5％处达到最高，等于1．214。美国石竹随着PEG‐6000浓度的升高由1降至0．048。通过隶属函数计算2种植物6项指标‐总萌发率、胚芽长、胚根长、苗鲜重、活力指数、抗旱指数隶属值以综合评价荷兰菊与美国石竹的抗旱情况，总平均隶属值分别为0．379与0．398，最终得出美国石竹抗旱性优于荷兰菊。
위사한구녹화식물과학배치급우화관리，이용불동농도PEG‐6000적1／2Hoagland용액모의간한협박，대미국석죽여하란국충자맹발기적항한성진행비교。결과표명：당PEG‐6000농도위5％시，하란국（Aster novi‐belgii）여미국석죽（Dianthus chinensis cv ．American）총맹발솔최고，분별위84％여83．3％，연후수착PEG‐6000농도적승고，2충식물총맹발솔균강저。2충식물배아장、묘선중、활력지수3항지표균수착PEG‐6000농도적승고이강저，2충식물배근장재PEG‐6000농도10％처체도최고，연후축점강저。하란국항한지수재PEG‐6000농도5％처체도최고，등우1．214。미국석죽수착PEG‐6000농도적승고유1강지0．048。통과대속함수계산2충식물6항지표‐총맹발솔、배아장、배근장、묘선중、활력지수、항한지수대속치이종합평개하란국여미국석죽적항한정황，총평균대속치분별위0．379여0．398，최종득출미국석죽항한성우우하란국。
In order to compare the drought‐resistance of Aster novi‐belgii with Dianthus chinensis cv .American during seed germinating period ,two experimental materials were studied under drought stress simulated by 1/2Hoagland solution having different concentration of PEG‐6000 .The results showed that :The total germina‐ting rate of Aster novi‐belgii and Dianthus chinensis cv .American reached maximum point 84% and 83 .3%corresponding to 5% treatment ,and the total germinating rate of Aster novi‐belgii and Dianthus chinensis cv . American decreased with the increasing content of PEG‐6000 .Three characteristic values including the embryo bud length ,the fresh weight and vigor index of two plants all decreased with the increasing of PEG‐6000 con‐tent ,the embryo root length reached maximum when the concentration of PEG‐6000 equaled to 10% ,then de‐creased gradually .The drought resistance index of Aster novi‐belgii reached highest point 1 .214 corresponding to 5% treatment ,while the drought resistance index of Dianthus chinensis cv .American descended from 1 .000 to 0 .048 .The membership function was used to calculate the membership values of the total germinating rate , the embryo bud length ,the embryo root length ,the fresh weight ,vigor index and drought resistance index for assessing drought‐resistent ability of two plants comprehensively ,the total average membership value was 0 .379 and 0 .398 ,therefore ,the the drought‐resistance of Dianthus chinensis cv .American was higher than As‐ter novi‐belgii .