黑龙江农业科学Issue(4)：66-71,6.DOI:10.11942/j.issn1002-2767.2017.04.0066
四种园林花卉苗期抗旱特征分析及抗旱能力评价
Characteristics Analysis and Ability Evaluation of Drought-resistant of Four Garden Flowers at Seedling Stage
摘要
Abstract
In order to promote the scientific maintenance of garden flowers,taking northern four garden herb-flowers including Iris lactea Pall.var.Chinensis (Fisch.) Koidz,Hemerocallis fulva cv.'Golden Doll',Dianthus barbatus f.American,Aster novi-belgii as experimental materials,set three drought levels including normal growth(CK),moderate drought(MS) and heavy drought(SS) by means of controlling the soil relative water content,drought-resistant features of four plants' organs above-ground and under-ground at seedling stage were studied,the drought-resistant ability reciprocally was compared by membership function.The results showed that: (1)Along with the decrease of soil relative water content,the water content of shoot including functional leaf and root of Iris lactea Pall.var.Chinensis (Fisch.) Koidz decreased too.But the dry weight of root,the root length and the root surfarea rise oppositely.(2) The length of root,the root avgdiam,the root surfarea,the dry weight of root,the water content of root,the specific leaf weight,the dry weight of shoot and water content of shoot of Hemerocallis fulva cv.'Golden Doll' were the highest corresponding to MS treatment,it showed that the seedlings of 'Golden Doll' demand lower water with high efficiency on absorbing and using water between under-ground and above-ground organs.(3) The dry weight of root of Dianthus barbatus f.American of CK was highest,and only a litter change occurred between MS and SS.The dry weight of shoot had no significant difference among three treatments.The water content of root and the water content of shoot of Dianthus barbatus f.American rise and decrease successively,in addition,other measured characteristics of Dianthus barbatus f.American change unobviously and heterogeneously among different treatments.(4) The root growth and water absorption principles of Aster novi-belgii were not obvious,characteristics vary more apart under different treatments.(5) The drought-resistant ability of four plants were evaluated comprehensively by membership function,the results indicated that the drought-resistant ability order,Hemerocallis fulva cv.'Golden Doll' was the most strong,Iris lactea Pall.var.Chinensis (Fisch.) Koidz and Dianthus barbatus f.American took second place,Aster novi-belgii was relatively weak.关键词
园林草本/WinRHIZO根系分析系统/比叶重/抗旱性/隶属函数Key words
garden herb/WinRHIZO root analyzing system/specific leaf weight/drought-resistance/membership function.分类
农业科技引用本文复制引用
魏鹏..四种园林花卉苗期抗旱特征分析及抗旱能力评价[J].黑龙江农业科学,2017,(4):66-71,6.基金项目
宁夏高等学校科学研究资助项目(NGY2014188) （NGY2014188）
