摘要
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 novibelgii)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。
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.
出处
《黑龙江农业科学》
2015年第11期107-110,共4页
Heilongjiang Agricultural Sciences
基金
宁夏高等学校科学研究资助项目(NGY2014188)
宁夏回族自治区大学生创新创业资助项目(NGZ20140112)
关键词
节水绿化
抗旱性
隶属函数
种子萌发
water saving green
drought-resistance
membership funetion
seed germination
