Karimmojeni Hassan, Rahimian Hamid, Alizadeh Hassan, Yousefi Ali Reza, Gonzalez-Andujar Jose L, Sweeney Eileen Mac, Mastinu Andrea
Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Department of Agronomy and Plant Breeding, University of Tehran, Karaj 77871-31587, Iran.
Plants (Basel). 2021 Sep 15;10(9):1922. doi: 10.3390/plants10091922.
The objective of this study was to explore the physical properties of maize seeds in competition with weeds. The basic and complex geometric characteristics of seeds from maize plants, competing with L. (DS) or (XS) at different weed densities, were studied. It was found that the basic and complex geometric characteristics of maize seeds, such as dimension, aspect ratio, equivalent diameter, sphericity, surface area and volume, were significantly affected by weed competition. The increase in weed density from 0 to 8 plants m resulted in an increase in the angle of repose from 27° to 29°, while increasing weed density from 8 to 16 plants m caused a diminution of the angle of repose down to 28°. Increasing the density of XS and DS to 16 plants m caused a reduction in the maximum 1000 seed weight of maize by 40.3% and 37.4%, respectively. These weed side effects must be considered in the design of industrial equipment for seed cleaning, grading and separation. To our knowledge, this is the first study to consider the effects of weed competition on maize traits, which are important in industrial processing such as seed aeration, sifting and drying.
本研究的目的是探究与杂草竞争时玉米种子的物理特性。研究了在不同杂草密度下，与狗尾草（DS）或马唐（XS）竞争的玉米植株种子的基本几何特征和复杂几何特征。结果发现，杂草竞争对玉米种子的基本几何特征和复杂几何特征有显著影响，如尺寸、长宽比、等效直径、球形度、表面积和体积等。杂草密度从0增加到8株/平方米，导致休止角从27°增加到29°，而杂草密度从8增加到16株/平方米，则使休止角减小至28°。将XS和DS的密度增加到16株/平方米，分别使玉米的最大千粒重降低了40.3%和37.4%。在设计种子清理、分级和分离的工业设备时，必须考虑这些杂草的副作用。据我们所知，这是第一项考虑杂草竞争对玉米性状影响的研究，这些性状在种子通气、筛选和干燥等工业加工过程中很重要。
