一串红种子风筛选和重力选关键参数研究

Key parameters of air-screen cleaning and gravity separating of Salvia splendens seed

为确定一串红种子风筛选和重力选关键参数,提高一串红种子净度和发芽率,使用风筛式种子清选机LA-LS和重力式种子清选机LAKTA对不同收获时间、不同收获地点的国产一串红品种‘奥运圣火1120’、‘83’、‘73’进行风筛选和重力选,并对其风筛选和重力选的适宜参数进行研究。结果表明,一串红种子风筛选适宜参数是振动频率417次/min,喂料速度3档,筛选2~4次;使用重力式种子清选机对一串红种子进行清选,对发芽率影响较大的因素依次是纵向倾角、振动频率;喂料速度、横向倾角。适合一串红种子重力选适宜参数是纵向倾角1°,振动频率7档,喂料速度6档,横向倾角4°,筛选2次。获选率大于94%。

The Salvia splendens seeds of ‘Olympic Flame 1120＇,‘83＇and ‘73＇at different harvest time and in different harvest location were collected as study material.The key parameters were studied by LA-LS air-screen seed cleaner and LAKTA gravity separator.For the air-screen seed cleaner,the vibration velocity was 417times/min,the feeding speed was band 3,screening 2to 4times.The effect order on germination rate of gravity separator is end slope/vibration velocity,feeding velocity,side slope.The better settings for the gravity separator were as follows：end slope 1°,vibration velocity 7band,feeding velocity 6band,side slope 4°and screening times 2.The percentage of chosen seed was higher than 94%.The results provide the technical support for mechanized and standardized proceeding of screening Salvia splendens seeds.