包衣稻种物理特性的试验研究

包衣稻种的物理特性是基于包衣稻种的播种机参数设计和性能分析的基础数据。选择了西南地区广泛种植的3个杂交水稻品种（Ⅱ优838、Ⅱ优多系57和岗优22），对其包衣稻种的容积密度、粒子密度、恢复系数和漂浮系数等物理特性进行了试验研究。按照正交试验设计原理安排试验方案，并对结果进行了方差分析，找到了影响这些特性的主要因素及因素影响的显著性度。试验结果和分析表明：稻种状态（包衣与否）对容积密度影响显著，对漂浮系数影响比较显著，对籽粒密度和恢复系数影响较小；含水率对包衣稻种的容积密度、业粒密度和漂浮系数影响显著；品种对包衣稻种的物理特性影响较小。试验研究得到了包衣稻种在不同影响因素和各因素不同水平条件下物理特性的具体数值。

Experimental study on physical properties of coated rice seed

The physical properties of coated rice seed are fundamental data for parameter design and performance analysis of a coated rice seed involved seeder. In this paper, some properties of coated seed of three hybrids (IIyou838, IIyouduoxi57, and Gangyou22) widely cultivated in Southwest China were experimentally studied. They are bulk density, particle density, restitution coefficient and drag coefficient. Experimental arrangements were planned via method of orthogonal experiment design, and analysis of variance (Anova) was conducted. Major factors and their significant levels affecting these properties were determined. Tested results and analysis show: seed condition (coated or not) has a significant effect on bulk density, a comparatively significant effect on drag coefficient, and little effect on particle density and restitution coefficient of rice seed; moisture content significantly affects bulk density, particle density and drag coefficient of coated rice seed; variety of seed has little effect on the properties of coated rice seed. Practical data of tested properties of coated rice seed of different factors and at any level of the factors are available from the study.