白羊草种群繁殖的数量特征

doi:10.11733/j.issn.1007-0435.2006.03.003

›› 2006, Vol. 14 ›› Issue (3): 210-213.DOI: 10.11733/j.issn.1007-0435.2006.03.003

白羊草种群繁殖的数量特征

董宽虎¹, 米佳²

1. 山西农业大学动物科技学院, 山西太谷, 030801;
2. 中国农业大学草地研究所, 北京, 100094

收稿日期:2005-07-03 修回日期:2006-06-10 出版日期:2006-08-15 发布日期:2006-08-15
作者简介:董宽虎(1956- ),男,山西偏关人,教授,博士生导师,从事草地资源与草地管理研究,已发表学术论文60余篇,E-mail:dongkuanhu@sxau.edu.cn
基金资助:
山西省自然科学基金(971093)

Quantitative Characters of Vegetative Multiplication of Bothriochloa ischaemum Populations

DONG Kuan-hu¹, MI Jia²

1. College of Animal Science and Technology, Shanxi Agriculture University, Taigu, Shanxi Province, 030801, China;
2. Institute of Grassland Science, China Agriculture University, Beijing, 100094, China

Received:2005-07-03 Revised:2006-06-10 Online:2006-08-15 Published:2006-08-15

摘要/Abstract

摘要： 于抽穗-开花期测定分析白羊草(Bothrioch loaischaemum)株丛的繁殖数量特征。结果表明:丛茎枝数、丛地上生物量和丛生殖枝数分别随丛径呈指数函数增加,丛生殖枝重随丛径呈幂函数增加,丛地上生物量与丛茎枝数,以及丛生殖枝重与丛生殖枝数之间均呈线性增加,生殖枝数和营养枝数比值随株丛高度和丛径均呈二次曲线变化。

关键词: 白羊草, 种群, 繁殖, 数量特征

Abstract: Bothriochloa ischaemum is a perennial grass species.In the Shanxi rangelands,the population reproduction is mainly by vegetative multiplication.Tuft size is a decisive factor that determines many of the quantitative characters of population reproduction.The values of the grass quantitative characters have high pertinence with the tuft size.Through investigation and measurement of many samples from independent tufts and random samples from normal spikes in a single dominant community,the quantitative characters of sexual reproduction and vegetative multiplication of Bothriochloa ischaemum populations in Shanxi rangelands were analyzed.The results show that there was an obvious regularity with the quantitative characters of vegetative multiplication of the Bothriochloa ischaemum populations.The tiller number,aboveground biomass,and number of reproductive tillers of the tuft increased exponentially with its expanding size.The weight of reproductive tillers of the tuft rose with its spreading size power-functionally.There existed a significant positive linear correlation between the tuft aboveground biomass and its tiller number,and that between the number and the weight of reproductive tillers.The ratio between the number of reproductive and of vegetative tillers of the tuft changed conically with the tuft mean height and size.

Key words: Bothriochloa ischaemum, Populations, Vegetative multiplication, Quantitative characters

中图分类号:

S53.9
S812

董宽虎, 米佳. 白羊草种群繁殖的数量特征[J]. , 2006, 14(3): 210-213.

DONG Kuan-hu, MI Jia. Quantitative Characters of Vegetative Multiplication of Bothriochloa ischaemum Populations[J]. , 2006, 14(3): 210-213.

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白羊草种群繁殖的数量特征

Quantitative Characters of Vegetative Multiplication of Bothriochloa ischaemum Populations

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