小区育种插装式排种器的设计

为提高育种试验机械化水平，降低试验劳动强度，按照小区育种播种机的技术要求，设计了一种插装式排种器，并以作业速度和株距为影响因素对其工作性能进行了测试。结果表明：作业速度为0.4～0.6 m/s，株距为8.5 cm时，粒距合格指数≥82.45%、重播指数≤13.38%、漏播指数≤4.16%，均达到优等品标准；株距为4.0 cm时，合格指数≥65.25%，达到一等品标准；重播指数≤13.87%，达到优等品标准；漏播指数≤19.50%，达到一等品标准。示范试验表明该排种器结构及排种性能满足小区育种农艺要求。

Design of insert-metering device for subdistrict breeding seeder

In order to improve the mechanization level of breeding experiment, reduce labor intensity, according to the demand of the subdistrict breeding seeder, a metering device named insert-metering device for subdistrict breeding seeder was designed. The performance of the metering device was tested by the different working speeds and inter-plant spacing. Results showed that while the working speed was from 0.4 m/s to 0.6 m/s, inter-plant spacing was 8.5cm, the acceptability rate was equal to or greater than 82.45%, the multiples rate was equal to or less than13.38%, the miss rate was equal to or less than 4.16%, which all met the requirement on the highest class product; while inter-plant spacing was 4.0cm, the acceptability rate was equal to or greater than 65.25%, met the requirement on the first class product, the multiples rate was equal to or less than 13.87%, met the requirement on the highest class product, the miss rate was equal to or less than 19.50%, met the requirement on the first class product. The experiment results indicated that the structure and breeding performance of metering device satisfied the agriculture requirement.