›› 2012, Vol. 20 ›› Issue (5): 848-854.DOI: 10.11733/j.issn.1007-0435.2012.05.009

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Allelopathic Effect of Different Herbaceous Plants during Vegetation Succession in the Hilly-Gully Region of Loess Plateau

ZHANG Chao1,4, DONG Shu-qi2, LIU Guo-bin1,3, XUE Sha3, XIAO Lie3, MA Hai-long3   

  1. 1. Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling, Shaanxi Province 712100, China;
    2. College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China;
    3. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi Province 712100, China;
    4. Graduate School of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-04-19 Revised:2012-07-10 Online:2012-10-15 Published:2012-11-01

黄土丘陵区植被演替中不同草本植物间的化感效应

张超1,4, 董淑琦2, 刘国彬1,3, 薛萐3, 肖烈3, 马海龙3   

  1. 1. 中国科学院教育部水土保持与生态环境研究中心, 陕西 杨凌 712100;
    2. 西北农林科技大学资源环境学院, 陕西 杨凌 712100;
    3. 西北农林科技大学水土保持研究所, 陕西 杨凌 712100;
    4. 中国科学院研究生院, 北京 100049
  • 通讯作者: 刘国彬,E-mail:xuesha100@163.com
  • 作者简介:张超(1985-),男,陕西宝鸡人,博士研究生,主要从事于恢复生态学研究,E-mail:zhagnchaolynn@163.com
  • 基金资助:
    中国科学院研究生科技创新与社会实践资助专项;陕西省科技基础研究项目(2011JQ5007);中国科学院战略科技先导项目(XDA05060300)资助

Abstract: To study the allelopathic effect of different plants during vegetation succession, the dominate species (Artemisia capillaries and Artemisia sacrorum) at different stages of succession on abandoned cropland in the hilly-gully region of Loess Plateau were selected to investigate the effect of A. capillaries and A. sacrorum on the seed germination and seedling growth of other plants. Results showed that the allelopathic effect of different- part extracts of plants differed significantly due to different composition and release. Aqueous extracts of early successional species, A. capillaries, inhibited seed germination of A. sacrorum and Bothriochloa ischaemum while promoting seedling growth of Lespedeza davurica and B. ischaemum. The rhizosphere soil and root extracts of A. capillaries promoted root growth of A. sacrorum,L. davurica and B. ischaemum. Above-ground- part extracts promoted root growth of L. davurica and B. ischaemu. Aqueous extracts of later species, A. sacrorum, strongly inhibited seed germination of A. capillaries and B. ischaemum. Aqueous extracts from rhizosphere soil and roots promoted seedling growth of A. capillaries,L. davurica and B. ischaemum. Above-ground- part extracts inhibited seedling growth of L. davurica and B. ischaemum. Furthermore, a self-allelopathy effect was found for A. capillaries and A. sacrorum. In conclusion, extract from different parts of A. capillaries and A. sacrorum inhibited seed germination of four tested plants. However, the extract inhibited root and seedling growth at high concentration, whereas promoted root and seedling growth at a low concentration.

Key words: Vegetation succession, Artemisia capillaries, Artemisia sacrorum, Allelopathic effect

摘要: 为了解植被演替过程中不同植物间的化感作用,选取黄土丘陵区退耕地撂荒演替中不同阶段的优势物种茵陈蒿(Artemisia capillaries)和铁杆蒿(Artemisia sacrorum),分析它们对其他植物种子萌发及幼苗生长的影响。结果表明:不同部位水浸提液由于其化感物质及其释放方式的不同,化感作用存在明显差异。演替前期物种茵陈蒿水浸提液对铁杆蒿和白羊草(Bothriochloa ischaemum)种子萌发有明显抑制作用,而对达乌里胡枝子(Lespedeza davurica)和白羊草幼苗的生长总体表现为促进作用;茵陈蒿根际土和根系水浸提液促进铁杆蒿、白羊草和达乌里胡枝子根的生长,而地上部水浸提液可促进白羊草和胡枝子根的生长。演替后期物种铁杆蒿对茵陈蒿和白羊草种子萌发有较强的抑制作用;其根际土和根系水浸提液可促进茵陈蒿、白羊草和达乌里胡枝子幼苗的生长;地上部水浸提液抑制白羊草和达乌里胡枝子幼苗的生长。茵陈蒿和铁杆蒿对于自身种子萌发以及幼苗的生长具有一定的自毒作用,表现为茵陈蒿根系和地上部水浸提液强烈抑制自身种子萌发;高浓度的铁杆蒿根系和地上部水浸提液对自身的种子萌发以及根、芽的生长具有明显抑制作用。综上所述,茵陈蒿和铁杆蒿不同部位水浸提液对4种受体植物种子萌发表现出不同程度的抑制作用,对根和芽的生长呈现出由"高抑低促"的作用。

关键词: 植被演替, 铁杆蒿, 茵陈蒿, 化感作用

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