Acta Agrestia Sinica

›› 2006, Vol. 14 ›› Issue (4): 324-327.DOI: 10.11733/j.issn.1007-0435.2006.04.006

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Effects of Fire on the Quantitative Characters of Sexual Reproduction of Zoysia japonica Population in Liaodong Peninsula, China

ZHANG Xue-yong1,2, YANG Yun-fei1, WANG Zhao-ming3, Qin Na2   

  1. 1. Institute of Grassland Science, Northeast Normal University, Key Laboratory of Ecological Restoration and Ecosystem Managementof Jilin Province, Key Laboratory for Vegetation Ecology, Ministry of Education, Changchun, Jilin Province 130024, China;
    2. Institute of Ecology and Environment, Liaoning University, Shenyang 110036, China;
    3. Grassland Science Station of Xiuyan Country, Anshan, Liaoning Province 114300, China
  • Received:2006-03-01 Revised:2006-08-08 Online:2006-11-15 Published:2006-11-15

火烧对结缕草种群有性生殖的影响

张学勇1,2, 杨允菲1, 王兆明3, 亓娜2   

  1. 1. 东北师范大学草地研究所, 吉林省生态恢复与生态系统管理重点实验室, 植被生态科学教育部重点实验室, 长春, 130024;
    2. 辽宁大学生态环境研究所, 沈阳, 110036;
    3. 辽宁省岫岩满族自治县草原站, 鞍山, 114300
  • 通讯作者: 杨允菲,E-m ail:yangyf@nenu.ed u.cn
  • 作者简介:张学勇(1971- ),男,内蒙古宁城县人,助理研究员,在读博士,E-mail:zxy325007@yahoo.com.cn
  • 基金资助:
    国家自然科学基金项目(30470272,30270260)资助

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Abstract: The effect of fire on the quantitative characters of sexual reproduction of Zoysia japonica population in Liaodong Peninsula was studied. The results show that burning of the Z.japonica grass before its bur-geoning in March could very significantly reduce the number of grain per spike(NGPS), but impressively raise the density of the reproductive tillers, while not influence the weight of 1000 grains (WTG). Thus, the grain yield in the burnt plot was 1.85 times higher than that in the non-burnt plot. Burning largely enhanced the fecundity of Z.japonica population not by increasing the weight per grain but by increasing the number of grain. The height of the reproductive tillers(HRT) was positively correlated to some quantitative characters of reproduction, such as number of grain per spike, spike length, and weight of grain per spike, but negatively correlated to ratio of spike to reproductive tiller length, and reproductive allocation.The quantitative rela-tionships between those quantitative characters and height of reproductive tillers were the same in the burnt and non-burnt plots.

Key words: Zoysia japonica population, Sexual reproduction, Fire effects, Liaodong Peninsula

摘要： 研究火烧和未烧样地结缕草(Zoysia japonica)种群的有性生殖数量特征。结果表明:火烧极显著地增加了生殖枝密度,极显著地降低了花序种子数,但对千粒重没有显著影响,种子产量是未烧的1.85倍;火烧并未影响种子质量(千粒重)而是增加了种子数量(粒数)并提高其生育力;火烧未改变有性生殖数量性状(花序种子数,花序长,生殖生长比率,花序种子重和生殖分配)与生殖枝高度间的定量关系。

关键词: 结缕草, 有性生殖, 火烧, 辽东半岛

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