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辽东半岛不同生境结缕草种群有性生殖株的数量特征

作  者:
亓娜;张学勇;杨允菲;关伟;赵春艳
单  位:
辽宁大学环境科学院;东北师范大学草地研究所;辽宁大学生态环境研究所
关键词:
结缕草;有性生殖株;数量特征;辽东半岛
摘  要:
通过对结缕草种子成熟期有性生殖株的测定,分析了辽东半岛不同生境结缕草种群有性生殖株的种子数量(每花序种子数)和质量(千粒质量)以及生长量(株高)和生殖生长量(花序长,生殖生长比率)的数量特征及其差异。结果表明,生态条件较差生境的结缕草种群,其有性生殖株的株高、花序长、每花序种子数及千粒质量均最低,而生殖生长比率最高,说明不同生境结缕草种群有性生殖株的生殖生长、生育力、其种子生存与竞争力主要受到环境的限制,但有性生殖株个体自身具有生殖生长调节策略,生态条件较差的生境结缕草种群有性生殖株将更多的生长量用于生殖生长。
译  名:
Quantitative characters of reproductive tillers of Zoysia japonica population in different habitats in Liaodong Peninsula of China
作  者:
QI Na1,ZHANG Xue-yong2,YANG Yun-fei3,GUAN Wei1,ZHAO Chun-yan1(1.College of Environmental Science,Liaoning University,Shenyang 110036,China;2.Institute of Ecology and Environment,Liaoning University,Shenyang 110036,China;3.Institute of Grassland Science,Northeast Normal University,Changchun 130024,China)
关键词:
Zoysia japonica;reproductive tiller;quantitative character;Liaodong Peninsula
摘  要:
The quantitative characters of reproductive tillers of Zoysia japonica population in different habitats in Liaodong Peninsula of China were studied in seed ripening stage.The results showed that the height,spike length,number of seed per spike and weight of one thousand seeds were lowest,but the growth for reproductive tiller was greater in the harsh habitat.Those results reflected that the reproductive growth ability,the fecundity and seed competition were mainly affected by environmental resources,but the reproductive tillers could regulate their own reproductive growth in different habitats.

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