Krailas Kiyothong, Chureerat Satjipanon, and Pimpaporn Pholsen

pp. 587 - 593

Abstract

The objectives of this experiment were to study the effect of cutting height and time on seed yield
and seed quality of Stylosanthes guianensis CIAT 184 in Korat soil series at Khon Kaen Animal Nutrition
Research Center, during April 2000 - May 2001. The experimental design was 2 × 4 factorial in randomized
complete block design with 4 replications. The treatment consisted of 2 factors: - 1) Two levels of cutting
height viz. 20 and 30 cm above ground; 2) Four periods of cutting time viz. at 60, 75, 90 days before 50%
flowering date and uncut.
The results revealed that seed yield and seed quality were unaffected by cutting height (P>0.05).
Seed yield and PGSY obtained from cutting at 90 days and uncut were significantly higher (P<0.05) than
cutting at 75 and 60 days (1,575 and 1,438; 1,563 and 1,425; 1,119 and 988; 644 and 563 kg/ha, respectively).
There were no significant differences between cutting at 60 and 75 days in 1000-seed weight, but both
treatments were significant higher (P<0.05) than cutting at 90 days and uncut. Seed purity and germination percentages were unaffected by cutting height and time, ranging from 93 to 95 and 93 to 96 %, respectively.
Significant interactions between cutting height and time on seed yield and seed quality were not found.