Seeding Rate Adjustment Following Seed Quality for ATS-8 Hybrid Sweet Corn Production

Abstract

The study was conducted at Department of Plant Science, Faculty of Natural Resources, Prince ofSongkla University, Hat Yai, Songkhla. The objectives were to study effects of seeding rate adjustment followingseed quality on growth and yield of ATS-8 hybrid sweet corn. The experimental design was 3 x 4 factorial in random-ized complete block with 4 replications. Three quality seeds used were 70 - 80, 80 - 90 and higher than 90% germi-nation. One seed planting at 3 spacings of 70 X 20 cm., 60 X 20 cm. and 50 X 20 cm. were planted compared torecommend seeding rate of three seeds with one plant left after germination at spacing 75 X 25 cm. Three plantingdates were in August 2005, January and May 2006. The high quality seed gave number of plant and yield per raihigher than medium and low quality seed, respectively. Seed quality did not effect on growth and yield quality.Increasing of seeding rate increased number of plant and yield per rai but decreased the standard ear size. Highquality seed of ATS - 8 hybrid sweet corn could be planted at 50 x 20 cm. or 15,600 plants per rai which yield 40 -60% higher than recommended planting rate. One seeding rate increment could be used the compensate for 10%germination decreasing in seed quality.