| 黄花草木樨苗期耐盐性综合评价 |
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| 引用本文： | 田小霞,毛培春,郑明利,孟林.黄花草木樨苗期耐盐性综合评价[J].草业科学,2022,39(1):123-132. |
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| 作者姓名： | 田小霞 毛培春 郑明利 孟林 |
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| 作者单位： | 北京市农林科学院草业花卉与景观生态研究所, 北京 100097 |
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| 基金项目： | 北京市农林科学院科技创新能力建设专项(KJCX20200107)%国家国际科技合作专项(2015DFR30570-6)%河北省重点研发计划项目(19224205D) |
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| 摘 要： | 牧草苗期的耐盐性是栽培草地成功建植的关键.本研究采用水培法,通过测定68份黄花草木樨(Melilotus officinalis)种质材料在不同盐浓度下(0、50、100、150、200?mmol·L?1)苗期的生长速率、叶绿素总含量、苗高、存活率、植株干重和单株绿叶数,以各单项指标的耐盐系数为基础,利用主成分分析、隶...
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| 关 键 词： | 黄花草木樨 苗期 种质资源 NaCl胁迫 主成分分析 耐盐性 综合评价 |
Comprehensive evaluation of the salt tolerance of Melilotus officinalis at the seedling stage |
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| TIAN Xiaoxia,MAO Peichun,ZHENG Mingli,MENG Lin.Comprehensive evaluation of the salt tolerance of Melilotus officinalis at the seedling stage[J].Pratacultural Science,2022,39(1):123-132. |
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| Authors: | TIAN Xiaoxia MAO Peichun ZHENG Mingli MENG Lin |
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| Institution: | (Institute of Grassland,Flowers and Ecology,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097,China) |
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| Abstract: | Understanding the salt tolerance of forage grass at the seedling stage is essential for the success of cultivated grassland planting.In this study,the growth rate,chlorophyll content,seedling height,survival rate,dry weight,and number of green leaves were measured under various salt concentrations(0,50,100,150,200 mmol·L?1)at the seedling stage using a hydroponic method.Moreover,the salt tolerance comprehensive evaluation value(D value)of 68 Melilotus officinalis germplasms was comprehensively calculated using principal component analysis,the subordination function,and the index weight method,based on the salt tolerance coefficient of each individual index.The results revealed that the single index of different germplasm materials showed a significant positive correlation under salt stress(P<0.01).Based on a cluster analysis of the D value,the 68 M.officinalis germplasms were divided into 6 highly salt-tolerant,20 moderately salt-tolerant,27 mildly salt-sensitive,and 15 salt-sensitive accessions.Moreover,stepwise regression analysis was performed on the D value and salt tolerance coefficient,and the survival rate,chlorophyll content,and number of green leaves were determined to be good criteria for salt tolerance evaluation in M.officinalis accessions at the seedling stage.This study provides a theoretical basis for the establishment of M.officinalis-cultivated grasslands on saline-alkaline land. |
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| Keywords: | Melilotus officinalis seedling stage germplasm resource NaCl stress principal components analysis salt tolerance comprehensive evaluation |
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