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本文从生态经济学角度,研究了鲁西平原麦区播娘蒿(Deseurainia sophia L.schur)与小麦的竞争关系,通过两年试验,得出了播娘蒿有关生物性状与小麦产量结构的相关关系;提出了播娘蒿密度与产量损失率的关系为幂函数曲线回归,即:y’=0.5226X~(0.6635)并求得当地生产水平下经济危害允许损失率(EIL)为2.56%,播娘蒿经济防除阈值(ET)模型:
In this paper, from the perspective of ecological economics, the competition between Deseurainia sophia L.schur and wheat was studied in the wheat field of Luxi Plain. Through two years of experiments, the correlation between the related biological traits and the yield structure of wheat was obtained The relationship between the density and the rate of yield loss was proposed as the power function curve regression, that is: y ’= 0.5226X ~ (0.6635) and the economic loss allowable loss ratio (EIL) under the local production level was 2.56% Artemisia annua economic threshold (ET) model: