Physical Properties of Soybeans in the Northern Thailand

泰国的大豆作为蛋白质、脂肪和维生素的来源发挥了重要作用。此外，最近动物饲料消费的扩大也加速了大豆的国内需求。本项目的目的是研究大豆含水率、冲击位置和冲击速度对种子品质和危害的影响。冲击试验机由旋转冲击盘和与冲击盘同步的夹豆盘组成。冲击盘由与速度控制器相连的可变电机驱动。豆子保持盘具有直径1.3 mm的径向小孔，这些小孔连接到130 mm水银的真空系统，而不放置豆子。用手将豆子以所需的取向放置在盘上的孔上，通过部分真空保持，直到受到冲击盘边缘处的尖端的冲击。受影响的豆子被挂在菜豆…上的窗帘抓住。以大豆CM60为试材，在不同播种量和不同水分含量的条件下，对大豆CM60种子进行了侧面和正面撞击试验。试验中使用了同步抓豆槽的旋转冲击试验机。试验结果表明，豆类在6.1m/S和12.9m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100m/100g的范围内对大豆种子没有明显的伤害。19.1和25.1m/S的冲击速度对大豆造成一定的物理损伤。前位的撞击比侧位的撞击造成的伤害更大。干燥的种子比含水率高的种子更容易受到伤害。冲击速度与种子含水率之间也存在交互作用，虽然有些种子没有受到损伤，但其萌发质量受到冲击的影响。种子正面撞击对萌发的影响比侧面撞击对种子萌发的影响更明显。较高的冲击速度可能比较低的冲击速度更能降低发芽率。此外，水分含量低的种子比水分含量高的种子受到的影响更大。较少

Soybeans in Thailand have playd an important role as a source of protein, fat and vitamins. Also the domestic demand of soybeans have been accelerated by the recent expansion of animal feed consumption. This has caused high shortage of soybeans resulting in the increase of impportation.Tha objective of this project is to sstudy the effects of soybean moisture content, position of impact and impact speed on seed qualities and damages.The impact tester consists of a rotating impact disk and a bean holding disk synchronized with the impacting disk. The impact disk is driven by a variable motor which is connected to the speed controller. The bean holding disk has 1.3 mm diameter radial holes which are connected to a vacuum system of 130 mm mercury with no bean placed. Beans placed by hand in desired orientation over the hole in the disk are held by partial vacuum until impacted by the tip at the edge of the impact disk. The impacted beans are caught by a curtain hanging over the bean colle … More ctor.Soybean CM60 variety was investigated by impacting the seeds at different speeeds and moisture contents at side and front positions. The ratating impact tester with synchronized bean holding diks was used in the experiment. Test results showed that bean impacted at 6.1 and 12.9 m/s caused no visible damage to soybean seeds at all moisture levels from 10.7 to 16.7 %. Impact speeds of 19.1 and 25.1 m/s caused some physical damage to soybean. Impact at front posiition made more damage than at side position. Drier seeds were sucessible to dameges more than the having higher moisture contents. Interaction was also found between impact speeds and seed moisture contents.Although no damage was noted in some seeds, their quality in terms of germination was affected by impact. Influence of impact on germination was more apparent when the seed was hit at front position than side position. Higher impact speeds could lower germination more than low impact speeds. Moreover, seeds at low moisture contents were more affected than seeds at higher moisture. Less