| 小叶三点金入侵结缕草草地形成混生群落的研究 |
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| 引用本文： | 冯凌,杨中艺.小叶三点金入侵结缕草草地形成混生群落的研究[J].草原与草坪,2004(2):37-39,46. |
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| 作者姓名： | 冯凌 杨中艺 |
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| 作者单位： | 甘肃农业大学,草业学院,兰州,730070;中山大学,生命科学学院,广州,510000 |
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| 摘 要： | 小叶三点金为多年生豆科植物,具有天然的超低矮性和很强的匍匐性。结缕草是多年生根茎型禾本科草种,有发达的地上匍匐茎和地下横走根茎,成坪后极难滋生杂草。鉴于观察到小叶三点金草侵占并覆盖结缕草草地的现象,通过观测频度、盖度、高度及演替速度等生态指标,从2种草混生群落的空间结构分布、植物量构成及对外界因素影响的反应等方面进行了研究。结果表明,小叶三点金的随机萌发及快速生长使其在草地上频度增大,高度的增加则导致盖度上升;植物量呈倒梯形分布是由小叶三点金从内部侵占结缕草草地的生态过程决定的;重度践踏和修剪极大地降低了群落的稳定性,因此要尽量避免。
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| 关 键 词： | 小叶三点金 结缕草 群落 侵占 |
| 文章编号： | 1009-5500(2004)02-0037-03 |
Study on the invasive effect of Desmodium microphylum on Zoysia japonica turf |
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| FENG Lin.Study on the invasive effect of Desmodium microphylum on Zoysia japonica turf[J].Grassland and Turf,2004(2):37-39,46. |
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| Authors: | FENG Lin |
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| Abstract: | Desmodium microphylum is a short legume with strong stolon and Zoysia japonica is a rhizomatic perennial turfgrass with well-developed stolon and underground rhizoma. Normally the Zoysia japonica turf is difficult to be invaded by weeds. However, it was observed by authors that Zoysia japonica turf in Guangzhou was invaded by Desmodium microphylum. So the spatial distribution of phytomass, variation of two communities and their response to external factors were studied in this paper and the results indicated that the frequency, height and cover degree rapidly increased after it invaded into Zoysia japonica community. The above-ground phytomass was far higher than that of underground. The heavy trample and mowing could reduce the stability of community. |
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| Keywords: | Desmodium microphylum Zoysia japonica community invasion |
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