Tuesday, 7 October 2008
George R. Brown Convention Center, Exhibit Hall E
Cotton is a perennial plant, exhibiting indeterminate growth and fruiting habits, but is grown as an annual crop, thereby increasing the necessity of intense management for profitable production. The experimental design was a randomized complete block with a factorial treatment arrangement (Factor A: N rates; Factor B: stop irrigation dates; Factor C: mepiquat chloride rates) and four replications. There was no significant difference between 100% nitrogen rate than 75% of recommended rate for boll number, boll weight, and seed cotton yield, but the differences for plant height and earliness were significant. Plant height, boll number, boll weight, and seed cotton yield, averages were increased by the addition of N rates, while earliness was reduced. Reducing stop irrigation dates had not significant effects on plant height, boll number, boll weight, seed cotton yield, and earliness. MC application reduced final plant height by 7 cm than the no treated. MC application reduced seed cotton yield percent, and boll number by 22%, and 11.18%, while boll weight and earliness were increase by 11.85%, and 4.9%, than the no treated.