摘要
精量播种技术是实现小麦高产、稳产的重要途径,本文研究了一种气吸式小麦精量排种器。排种器采用了内外圆管套装,利用真空负压通过外管直缝隙吸种的结构形式,并通过正交试验对排种器的缝隙宽度、旋转速度和负压值参数进行了优化。在田间与现有小麦播种机进行了对比试验,通过测量数据分析了直缝式小麦播种机的播种均匀性、田间出苗率、各行排种量一致性、总排种量稳定性以及种子破损率等性能。试验数据显示,该排种器比目前国内机械式小麦排种器的粒距变异系数提高了20%以上,播种均匀性方面有明显地提高。
The precision seeding technology is an important way to realize high and stable yield of wheat. In order to achieve the goal, a kind of pneumatic wheat precision seed-metering de- vice is designed. The seed-metering device with internal and external circular tube grip seeds in vertical slit of the external circular tube by the negative pressure of the internal circular tube. We optimized slit width, rotating speed and negative pressure of the seed-metering device by the orthogonal experiment. In the field, we did a contrast experiment through contrasting the existing mechanical seeder for wheat, and measured and analysed seeding uniformity, seedling emergence rate, consistency of each line seeding quantity, stability of total seeding quantity and rate of damaged seeds of the seed-metering device. The experiment data show seed distance variation coefficient increases 20% more than the current domestic mechanical wheat seed-metering device, and its seeding uniformity gains obvious improvement.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2013年第1期105-108,共4页
Journal of Hebei Agricultural University
基金
"十二五"国家粮食丰产科技工程(2011BAD16B08)
河北省科技支撑计划项目(11220619)
关键词
小麦
排种器
气吸
直缝式
正交试验
wheat seed-metering device pneumatic vertical slit
orthogonal experiment
