刈割频次对白三叶能量分配及构型的影响

应用生态学报 ›› 2003, Vol. ›› Issue (2): 215-218.

刈割频次对白三叶能量分配及构型的影响

包国章¹, 李向林², 沈万斌¹, 谢忠雷¹, 康春莉¹

1. 吉林大学环境科学与工程系, 长春 130023;
2. 中国农科院畜牧研究所, 北京 100094

收稿日期:2000-11-15 修回日期:2001-03-26
通讯作者: 包国章,男,1968年生.讲师,博士,主要从事植物种群生态学、污染生态学研究,发表论文11篇.E-mail:des@mail.glu.edu.cn.
基金资助:
国家“九五”科技攻关资助项目(960160202)

Effect of cutting periodicity on energy allocation and architecture of Trifolium repens

BAO Guozhang¹, LI Xianglin², SHEN Wanbin¹, XIE Zhonglei¹, KANG Chunli ¹

1. Environmental Science and Engineering Department, Jilin University, Changchun 130023, China;
2. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100094, China

Received:2000-11-15 Revised:2001-03-26

摘要/Abstract

摘要： 4～10月,在亚热带高山人工草地,通过生长季割2、4和7次的刈割试验后发现,不同刈割频次对翌年白三叶能量分配、构件密度、分枝数量及分枝角度影响显著.随刈割频次的增加,白三叶匍匐茎的能量分配递增,分别为42.8%、44.9%、47.7%,而单位长度茎所含能量递减,分别为13.0、12.2和11.1kJ·m^-1;叶密度、茎密度、分枝数量及节间长度出现低→高→低的变化趋势.提高刈割频次后,白三叶的分枝强度由15分枝·m^-1递增到23.7分枝·m^-1;分枝角度由49.5°递增到60.2°,从而提高了白三叶种群在刈割干扰下对土壤微生境资源的利用率.

关键词: 白三叶, 刈割, 能量分配, 构型, 线粒体DNA, 遗传结构, COII基因, 异色瓢虫, 地理种群, 遗传多样性

Abstract: On the subtropical mountain swards, the effect of cutting periodicity on energy allocation, module density, number of branches and branching angle of T.repens were significant,With cutting periodicity raised, the energy allocation of stolon increased steadly,the caloric content of unit stolon dropped gradually,and the changing pattern of leaf density,stem density, branch number and internode's length was from low to high,and then to low.The branching intensity of T.repens ranged from 15 to 23.7 branches穖^-2,and branching angle raried from 49.5皌o 60.2皐hile the cutting periodicity differed.

Key words: Trifolium repens, Cutting, Energy allocation, Architecture, mitochondrial DNA, genetic structure, COII gene, geographic population, genetic diversity., Harmonia axyridis

中图分类号:

Q142
S812

包国章, 李向林, 沈万斌, 谢忠雷, 康春莉. 刈割频次对白三叶能量分配及构型的影响[J]. 应用生态学报, 2003, (2): 215-218.

BAO Guozhang, LI Xianglin, SHEN Wanbin, XIE Zhonglei, KANG Chunli . Effect of cutting periodicity on energy allocation and architecture of Trifolium repens[J]. Chinese Journal of Applied Ecology, 2003, (2): 215-218.

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