[1]赵利敏,陈锐,郭素芬.温度对西洋参幼苗早期生长和发育的影响[J].北方园艺,2018,42(01):140-144.[doi:10.11937/bfyy.20171323]
　ZHAO Limin,CHEN Rui,GUO Sufen.Impacts of Temperature on Growth and Development ofAmerican Ginseng in Its Early Seedling Stage[J].Northern Horticulture,2018,42(01):140-144.[doi:10.11937/bfyy.20171323]

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温度对西洋参幼苗早期生长和发育的影响

《北方园艺》[ISSN:1001-0009/CN:23-1247/S] 卷: 第42卷期数: 2018年01 页码: 140-144 栏目: 出版日期: 2018-01-10

Title:: Impacts of Temperature on Growth and Development ofAmerican Ginseng in Its Early Seedling Stage

作者:: 赵利敏; 陈锐; 郭素芬; 陕西理工大学生物科学与工程学院，陕西省资源生物重点实验室，陕西汉中 723001

Author(s):: ZHAO Limin; CHEN Rui; GUO Sufen; College of Bioscience and Engineering,Shaanxi University of Technology/Shaanxi Key Laboratory of Bioresources,Hanzhong,Shaanxi 723001

关键词:: 西洋参; 幼苗期; 农艺性状; 发育起点温度; 有效积温; 倒数模型

Keywords:: Panax quinquefolium; seedling stage; agronomic characteristic; threshold temperature; thermal constant; reciprocal model

DOI:: 10.11937/bfyy.20171323

文献标志码:: A

摘要:: 以西洋参为试材，在6~18 ℃设5个温阶（T)培养，研究温度对西洋参萌芽籽出苗率、展叶期株高和发育历期（N)，数据纳入方差分析。结果表明：6~12 ℃利于萌芽籽出苗却显著抑制幼苗高度，而15~18 ℃引起出苗率显著下降却促进幼苗正常生长；幼苗自萌芽至展叶期的发育起点温度（C)为3.7 ℃，有效积温（K)为272.1 ℃?d。变量N与T呈反比，新建倒数模型为N=K/（T-C)=（272.1±22.9)/[T-（3.7±0.8)]。这2个参数反映幼苗完成早期发育所需热量条件，利于阐明温度效应并优化这一药用植物的催芽和栽培技术。

Abstract:: American ginseng （Panax quinquefolium) was taken as a test material,and five gradients of temperature （T) ranging from 6 ℃ to 18 ℃ were set up to rear its seedlings to determine impacts of temperature on growth and development of the medicinal plant.Agronomic characters such as emergence rate of germinating seeds,height of seedlings on the date of leaf expansion,and developmental duration （N) of seedlings from seed germination to leaf expansion were observed and measured,and data were subject to an ANOVA.The results indicated that T ranging from 6 ℃ to 12 ℃ was favorable to emergence of the seeds but significantly inhibited height of the seedlings,whereas that ranging from 15 ℃ to 18 ℃ caused emergence rate to decrease to some extent but promoted seedlings to grew into a normal height.The threshold temperature （C) was calculated 3.7 ℃ in its early seedling stage,and the thermal constant （K) was 272.1 ℃?d.Variable N was inversely proportional to T,and a new reciprocal model between them was established then,N=K/（T-C)=（272.1±22.9)/[T-（3.7±0.8)].The 2 parameters reflect thermal quantities needed by the plant for development in the stage,which contributed to explain temperature effects,and optimize both techniques of accelerating seed germination and cultivation for the medicinal plant.

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备注/Memo

第一作者简介：赵利敏（1954-），男，博士，教授，现主要从事昆虫学及植物保护学和IPM等研究工作。E-mail：zhaolm168@aliyun.com.

基金项目：陕西省自然科学基金重点资助项目（2009JZ006）。

收稿日期：2017-07-18

更新日期/Last Update: 2018-01-12