| 小粒径作物种子气力式排种器适应性试验 |
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| 引用本文： | 梅婷,谢方平.小粒径作物种子气力式排种器适应性试验[J].湖南农业大学学报(自然科学版),2014,40(2):216-220. |
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| 作者姓名： | 梅婷 谢方平 |
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| 作者单位： | 湖南农业大学工学院,湖南农业大学研究生院 |
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| 摘 要： | 针对现有气力式排种器对小粒径种子因吸附力大于重力造成落种困难的不足,设计了1种负压吸种、正压吹种的气力滚筒式小粒径种子排种器。选取油菜籽(球形)、芝麻种子(扁卵圆形)进行试验,以合格率为评价指标,通过转速、吸种压力、吹种压力、振动幅度等影响因素验证排种器的适应性。正交试验结果表明:该排种器能够适应球形、扁卵圆形种子的精播,合格率均能达到90%,球形种子精播效果优于扁卵圆形种子。影响油菜籽精播合格率的因素大小依次为吸种负压、振动幅度、转速、吹种正压;影响芝麻精播合格率的因素大小依次为转速、振动幅度、吹种正压、吸种负压。
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| 关 键 词： | 气力式 排种器 小粒径种子 适应性 |
| 收稿时间： | 2013/10/31 0:00:00 |
| 修稿时间： | 2014/1/12 0:00:00 |
Adaptability experiment on pneumatic metering device for small-sized seeds |
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| Mei Ting and Xie Fangping.Adaptability experiment on pneumatic metering device for small-sized seeds[J].Journal of Hunan Agricultural University,2014,40(2):216-220. |
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| Authors: | Mei Ting and Xie Fangping |
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| Institution: | College of Engineering Hunan Agriculture University, |
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| Abstract: | A small-sized seed pneumatic cylinder-seeder which adopts negative pressure to adsorb and positive pressure to blow seeds was designed for available seed metering device at present exhibiting sowing difficulty caused by adsorption affinity to the seed exceeding its gravity. Rape (sphere) and sesame (pancake) seeds were selected to test and verify the adaptability of the seeder based on pass percentage of seeding considering rotation rate, adsorbing pressure, blowing pressure, amplitude of vibration. The result of orthogonal tests indicated that the seeder can be used for precision planting of sphere and pancake seeds, the pass percentage of seeding reached 90% with seeding result of sphere seeds superior to pancake seeds. Negative pressure showed the biggest influence on the pass percentage of rape seeding, followed by amplitude of vibration, rotational speed; and positive pressure and for sesame seeding rotational speed showed the biggest influence followed by amplitude of vibration, positive pressure and negative pressure. |
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| Keywords: | pneumatic seed metering device small sized seeds adapt ability |
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