WEI Peng.Characteristics Analysis and Ability Evaluation of Droughtresistant of Four Garden Flowers at Seedling Stage[J].HEILONGJIANG AGRICULTURAL SCIENCES,2017,(04):66-71.[doi:10.11942/j.issn10022767.2017.04.0066]
四种园林花卉苗期抗旱特征分析及抗旱能力评价
- Title:
- Characteristics Analysis and Ability Evaluation of Droughtresistant of Four Garden Flowers at Seedling Stage
- 文章编号:
- 10022767(2017)04006606
- 关键词:
- 园林草本; WinRHIZO根系分析系统; 比叶重; 抗旱性; 隶属函数
- Keywords:
- garden herb; WinRHIZO root analyzing system; specific leaf weight; droughtresistance; membership function.
- 分类号:
- Q94
- 文献标志码:
- A
- 摘要:
- 为了促进园林花卉的科学养护,以4种北方园林草本花卉马蔺(Iris lactea Pall.var.Chinensis (Fisch.) Koidz) 、金娃娃萱草(Hemerocallis fulva cv.‘Golden Doll’)、美国石竹(Dianthus barbatus f.American)和荷兰菊(Aster novibelgii)为研究对象,通过室内条件下控制土壤相对含水量,研究3个不同土壤相对含水量水平下(正常含水(CK)、中度干旱(MS)、重度干旱(SS))4种园林花卉植物种苗生长过程中地上地下部分器官的抗旱特征,并采用隶属函数法评价这4种植物的抗旱能力。结果表明:(1)随着土壤相对含水量减少,马蔺的茎叶(含功能叶)和根系含水量均降低,根干重、根系长度均升高,根表面积随之升高;(2)金娃娃萱草在MS处理下根长、平均根直径、根表面积、根干重、根含水量、比叶重、茎叶干重、茎叶含水量均最高,表明金娃娃萱草苗期水分需求较低,根叶水分利用统一高效;(3)美国石竹根干重CK最高,MS与SS两处理差别不大,地上干重3种处理无明显差异。根含水与地上茎叶含水变化一致,先升高后降低,其它指标在不同水分处理下变化规律不明显;(4)荷兰菊在各土壤含水量处理下,根系生长变化与吸水特征不明显;(5)利用隶属函数综合评价4种植物抗旱能力的结果表明,金娃娃萱草的抗旱能力最强,马蔺和美国石竹次之,荷兰菊的抗旱能力较弱。
- Abstract:
- In order to promote the scientific maintenance of garden flowers,taking northern four garden herbflowers including Iris lactea Pall.var.Chinensis (Fisch.) Koidz,Hemerocallis fulvacv.‘Golden Doll’,Dianthus barbatus f.American,Aster novibelgii 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,droughtresistant features of four plants’ organs aboveground and underground at seedling stage were studied,the droughtresistant 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 fulvacv.‘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 underground and aboveground 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 novibelgii were not obvious,characteristics vary more apart under different treatments.(5) The droughtresistant ability of four plants were evaluated comprehensively by membership function,the results indicated that the droughtresistant ability order,Hemerocallis fulva cv.‘Golden Doll’ was the most strong,Iris lacteaPall.var.Chinensis (Fisch.) Koidz and Dianthus barbatus f.American took second place,Aster novibelgiiwas relatively weak.
参考文献/References:
备注/Memo
收稿日期:2017-02-27基金项目:宁夏高等学校科学研究资助项目(NGY2014188)作者简介:魏鹏(1981-),男,宁夏回族自治区银川市人,硕士,讲师,从事植物生理生态学研究。E-mail:weipeng135@126.com。