雜草社會中物種的分布及再生稻和雜草間的競爭
Other Title
The Sequential Distribution of Species in Weed Communities and the Competition between Ratoon Rice and Weed
Journal
中華農業研究
Journal Volume
36
Journal Issue
2
Pages
173-189
Date Issued
1987-06-05
Date
1987-06-05
Author(s)
蕭柊瓊
鄔宏潘
D.C. Shiou
H.P. Wu
Abstract
本研究試以不經任何必工管理的再生水稻田，先以生態的觀點，將其視爲－擬雜草社會，調查田區內各個物種生物量的分布；並計算物種約優勢度、岐異度指數等生態介值，藉以描述雜草社會的生態特徵二計算物種分布的歪度、峰度及變異係數，進而討論歪度、峰度及變異係數與優勢度間之關係。再以農藝的觀點，調查雜草對再生稻及落粒稻之影響，並用複迥歸模式中之淨迥歸係數，表示各科雜草對再生稻及落粒稻之競爭程度。推求再生稻及落粒稻族羣之變異係數、歪度，藉此來比較在同一生態環境下，再生稻和落粒稻所承受的競爭壓力。The aims of this research were to investigate the sequential distribution of species in weed community, and to estimate the degree of competition among different major weed species with rice population. Results of this research were summarized as follows: 1. A survey of weed community developed from the abandoned rice field has demonstrated that the sequential distribution of weed species was exclusively lognormal and approximately geometric series.
Publisher
農業試驗所
Type
journal article
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