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| 农田杂草生态位研究的意义及方法探讨 | |
| 引用本文： | 郭水良,李扬汉. 农田杂草生态位研究的意义及方法探讨[J]. 生态学报, 1998, 18(5): 496-503 |
| 作者姓名： | 郭水良 李扬汉 |
| 作者单位： | 1. 浙江师范大学生物系,金华,321004 2. 南京农业大学农学系,南京,210095 |
| 摘 要： | 农田除草剂长期单一使用引起杂草种群的演变，增加了化学除草难度。预测除草剂作用下农田杂草群落的演变是当前迫切要求解决的问题。研究农田杂草生态位，揭示霜草种间生态心关系，结合杂草对除草剂敏感性资料，能够预测这种演变。本文以浙中油菜田为例，对该地区油菜田２４种主要杂草的姓进行了七级目测，计测了它们的生态位宽度和生态位重叠值；汉生态位重叠值为指标，用极点排序和图论聚类分析中的最小生成树法，作出了反映杂草生 |
| 关 键 词： | 油菜田 生态位 杂草 最小生成树 排序 |
| 收稿时间： | 1996-08-15 |
| 修稿时间： | 1997-07-10 |
SIGNIFICANCE AND METHOD OF STUDIES ON WEED NICHE IN CROP FIELDS |
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| GUO Shuiliang and LI Yanghan. SIGNIFICANCE AND METHOD OF STUDIES ON WEED NICHE IN CROP FIELDS[J]. Acta Ecologica Sinica, 1998, 18(5): 496-503 | |
| Authors: | GUO Shuiliang and LI Yanghan |
| Affiliation: | Department of Biology; Zhejiang Normal University; Jinhua; China |
| Abstract: | Long term application of a certain herbicide let a variation of weed populations in crop fields.It increases the difficulty controlling weeds effectively.Therefore,it is a hot problem for us to solve.Studies on the niche of weeds in crop fields can reveal the ecological demand similarity of different weeds.It can be applied to predict the change trend of crop weed community on the basis of the references about the sensitivity of various weeds to the herbicide applied.In this paper,the rape fields of Middl... |
| Keywords: | rape fields niche weed minimal spanning tree ordination. |
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