Allelopathic Effects of Artemisia ordosica on Its Seed Germination and Seedling Growth

doi:10.11733/j.issn.1007-0435.2014.04.018

Acta Agrestia Sinica ›› 2014, Vol. 22 ›› Issue (4): 796-802.DOI: 10.11733/j.issn.1007-0435.2014.04.018

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Allelopathic Effects of Artemisia ordosica on Its Seed Germination and Seedling Growth

GAO Shan^1,2, LIAO Chao-ying^1,2, GAO Zhi-hui³, LIU Rui-shun^1,2, Duojieji^2,3, XU Song^1,2

1. College of Natural Resources and Environment Science, Northwest A&F University, Yangling, Shaanxi Province 712100, China;
2. Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi Province 712100, China;
3. College of Forestry, Northwest A&F University, Yangling, Shaanxi Province 712100, China

Received:2013-09-26 Revised:2013-11-27 Online:2014-08-15 Published:2014-08-04

黑沙蒿对自身种子萌发与幼苗生长的化感作用研究

高姗^1,2, 廖超英^1,2, 高智辉³, 刘瑞顺^1,2, 多杰吉^2,3, 徐松^1,2

1. 西北农林科技大学资源环境学院, 陕西杨陵 712100;
2. 农业部西北植物营养与农业环境重点实验室, 陕西杨陵 712100;
3. 西北农林科技大学林学院, 陕西杨陵 712100

通讯作者: 廖超英
作者简介:高姗（1989-），女，天津人，硕士研究生，研究方向为水土保持与荒漠化，E-mail：gsapril@163.com
基金资助:
国家自然科学基金（30670339）资助

Abstract

Abstract:

The allelopathic effects of the ultrasonic aqueous extracts of Artemisia ordosica leaf and litter on its seed germination and seedling growth were investigated using bioassay methods. Sensitivity indices were calculated as well to assess the allelopathic potential of the donor. Results showed that the leaf aqueous extract of A. ordosica inhibited its seed germination and seedling growth, and the inhibitory effects were more obvious at germination stage compared to other tested stages. Germination index was more sensitive to the leaf aqueous extract than germination percentage. The relative conductivity, MDA content, height and root dry weight of seedling were inhibited at seedling stage. The inhibitory effects increased with the concentration of the leaf aqueous extracts.Theaqueous extracts of A. ordosica litter inhibited its seed germination slightly, but promoted its seedling growth and the effects increased along with the concentration of litter aqueous extracts. Root dry weight, root length and seedling dry weight were more sensitive to the aqueous extracts at seedling stage.

Key words: Artemisia ordosica, Seed germination, Seedling growth, Ultrasonic aqueous extracts, Allelopathy

摘要：

采用生物测定方法研究了黑沙蒿（Artemisia ordosica）枝叶与枯落物超声波浸提液对自身种子萌发与幼苗生长的化感作用，并分级计算敏感指数以综合评价其化感效应。结果表明：黑沙蒿枝叶浸提液可抑制自身种子萌发与幼苗生长，抑制作用在种子萌发期较为强烈，其中种子发芽指数受抑制程度明显大于发芽率；在幼苗生长期，对相对电导率、丙二醛含量、苗高和根干重抑制较为明显；2个生长期内抑制作用均随浓度的升高明显加强。黑沙蒿枯落物浸提液对自身种子萌发有轻微抑制作用，而对幼苗生长表现为促进作用，且随浓度的升高而加强，根干重、根长和苗干重是敏感性较强的指标。黑沙蒿枝叶浸提液可延缓自身种子萌发，减少萌发数目，损伤幼苗细胞膜系统；枯落物浸提液则可促进幼苗根系生长，增加干物质累积。

关键词: 黑沙蒿, 种子萌发, 幼苗生长, 超声波浸提液, 化感作用

CLC Number:

GAO Shan, LIAO Chao-ying, GAO Zhi-hui, LIU Rui-shun, Duojieji, XU Song. Allelopathic Effects of Artemisia ordosica on Its Seed Germination and Seedling Growth[J]. Acta Agrestia Sinica, 2014, 22(4): 796-802.

高姗, 廖超英, 高智辉, 刘瑞顺, 多杰吉, 徐松. 黑沙蒿对自身种子萌发与幼苗生长的化感作用研究[J]. 草地学报, 2014, 22(4): 796-802.

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Allelopathic Effects of Artemisia ordosica on Its Seed Germination and Seedling Growth

黑沙蒿对自身种子萌发与幼苗生长的化感作用研究

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