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 417 times/min, the feeding speed was band 3, screening 2 to 4 times.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 7 band, feeding velocity 6 band, 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.