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中国沙漠 ›› 2017, Vol. 37 ›› Issue (5): 910-916.DOI: 10.7522/j.issn.1000-694X.2016.00145

• 生物与土壤 • 上一篇    下一篇

四合木(Tetraena mongolica)种子萌发出苗对水分和沙埋的响应

李红颖1,2, 刘果厚1, 韩春荣3, 马少薇1, 兰庆1   

  1. 1. 内蒙古农业大学 草原与资源环境学院, 内蒙古 呼和浩特 010011;
    2. 内蒙古自治区林业科学研究院, 内蒙古 呼和浩特 730000;
    3. 乌海市湿地管理局, 内蒙古 乌海 016000
  • 收稿日期:2016-09-09 修回日期:2016-11-08 出版日期:2017-09-20 发布日期:2017-09-20
  • 通讯作者: 刘果厚(E-mail:guohouliu@163.com)
  • 作者简介:李红颖(1991-),女,吉林白城人,硕士研究生,主要从事植物多样性保护与利用研究。E-mail:15049115579@163.com
  • 基金资助:
    内蒙古自治区应用技术研究与开发资金计划项目(20131902)

Response of Seed Germination and Seedling Emergence of Tetraena mongolica to Soil Water Content and Sand Burial Depth

Li Hongying1,2, Liu Guohou1, Han Chunrong3, Ma Shaowei1, Lan Qing1   

  1. 1. College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010011, China;
    2. Inner Mongolia Academy of Forestry Science, Huhhot 010010, Inner Mongolia, China;
    3. Wetlands Authority of Wuhai, Wuhai 016000, Inner Mongolia, China
  • Received:2016-09-09 Revised:2016-11-08 Online:2017-09-20 Published:2017-09-20

摘要: 四合木(Tetraena mongolica)是西鄂尔多斯高原特有的珍稀濒危植物。通过室内模拟试验,分析了土壤含水量(5%、10%、15%、20%、25%、30%)、沙埋厚度(0、0.5、1、2、3 cm)及其交互作用对四合木种子萌发和出苗的影响,为四合木的繁育及保护提供科学依据。结果表明:四合木种子萌发的最适宜土壤含水量为20%,发芽率最大为81.33%。四合木种子出苗适宜0.5 cm以下的浅层沙埋,最适宜覆沙厚度为0.5 cm,出苗率最大为73.33%。当覆沙厚度超过2 cm时,四合木种子不出苗。土壤含水量和沙埋厚度对四合木种子的出苗率均有显著的影响(P<0.05)。当土壤含水量为20%,沙埋厚度为0.5cm时,四合木种子的出苗率最大、出苗速率最快。

关键词: 四合木(Tetraena mongolica), 沙埋, 土壤水分, 萌发

Abstract: Tetraena mongolica is a rare and endangered plants which is only found in Western Ordos Plateau of Inner Mongolia. The study used the method of indoor simulation experiments to discuss the influence of soil water content (5%, 10%, 15%, 20%, 25%, 30%), sand burial depth (0, 0.5, 1, 2, 3 cm) and their interaction on the seed germination and seedling emergence of T. mongolica. It will provide a scientific basis on breeding and protection for T. mongolica.The results showed that:The best optional soil water content for T. mongolica seeds germination was 20% at which the germination rate is up to 81.33%. T. mongolica seed is suitable for shallow sand burial depth under 0.5 cm, and the best optional seed covered sand burial depth was 0.5 cm at which the seed emergence rate surpassed 73.33%.When the seed covered sand burial depth was more than 2 cm, the seeding emergence did not occur. Soil water content and sand buried depth both had significant influence on the emergence rate of the T. mongolica (P<0.05).When the soil water content was 20%,and the seed covered sand depth was 0.5 cm,the seed emergence rate of T. mongolica was the maximum.

Key words: Tetraena mongolica, sand burial, soil water content, seed germination

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