Research on the spread strategy of Artemisia frigida populations during the desertification recovery process in Horqin sandy land

doi:10.11686/cyxb20140102

Abstract

Abstract: The erect and the creeping types of Artemisia frigida are the two different phenotypes of A. frigida populations in Horqin sandy land. The morphological and reproductive characteristics of above and below ground parts of A. frigida individuals were analyzed. Also,the similarities and differences of the two phenotypes were compared in order to study their strategies for spread. There were significant differences in the number of branches,twigs differentiation,inflorescence and root morphology between the two phenotypes. The average above ground biomasses of the erect type A. frigida was larger than that of the creeping ones which were mainly located at ten centimeters near the individual bases. Studying the cloning capability of creeping type A. frigida,we found that a single plant produced fewer than 10 ramets after being buried by sand and the spread of most of the ramets was 10-20 cm. There was a strong relationship between rooting number and seasonal rainfall after sand burial of branches of A. frigida. Moreover,roots produced after the branches were buried played an important role in the spread of A. frigida populations. The erect type A. frigida mainly reproduced by seeds,and spread was related to the local wind directions.

CLC Number:

S812.8

SUN Ying-jie,LI Yan-qing,ZHAO Ai-fen,HUANG Yu-qing,ZHOU Ai-ping,LUO Ai-ying,XU Guang-ping,YAO Yue-feng. Research on the spread strategy of Artemisia frigida populations during the desertification recovery process in Horqin sandy land[J]. Acta Prataculturae Sinica, 2014, 23(1): 3-9.

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