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针对小麦条锈病的近距离传播,在已有的单项传播、圆形传播研究的基础上,本研究提出模拟某一较短时间(数小时)内多风向、变风速共同作用所致的子代病害椭圆形传播模型。它是统计该段时间内的主风向及相应的侧方向风和反方向风,以其风速之比确定椭圆形分布的长短轴半径的比例以及分布中心在长轴上的位置,建立一种偏心椭圆锥体模型。其横截面为一个个椭圆,椭圆轨迹可模拟病害的等密度曲线,高度代表病情,锥体体积可模拟病害总量。把组建的子模型已有的时间动态模型串联或结合起来,组建了病害时空动态综合模型“XRZD-2”。
In view of the short-distance transmission of wheat stripe rust, based on the existing research on single transmission and circular transmission, this study proposed to simulate the generation of offspring caused by the interaction of wind direction and wind speed in a relatively short period of time (several hours) Disease elliptical propagation model. It is the statistics of the main wind direction during the period and the corresponding side wind and reverse wind, with its wind speed ratio to determine the ratio of the elliptical distribution of the short axis radius and distribution center on the long axis of the position, the establishment of an eccentric Elliptical cone model. The cross-section of an ellipse, elliptical trajectory can simulate the iso-density curve of disease, highly representative of the disease, cone volume can simulate the total amount of disease. The existing time dynamic models of the established sub-models are concatenated or combined to form a comprehensive model of the space-time spatial dynamics “XRZD-2”.