Effects of Irrigation Frequency Regimes and Weed Control Management, on Field Grown Tuberoses (Polianthes tuberosa L), in the Saudi Arabian Western Region: 1. Clump Growth & Development, Bulb Yield, Water Use Efficiencies and Bulb Nutrient Contents

摘要

MAXIMIZING subterranean tuberose clump and bulb yield, as propagule(s) for farmers and/or growers, through weed control management and rational watering frequency regimes, is thoughtful investigation, particularly under the harsh arid zone environment, in the Saudi Arabian Western Region. A Split-Split-Plot field experiment, in Randomized Complete Block Design (RCBD), with four replicates, was conducted, to investigate the effects of different irrigation frequency regimes; irrigation every 2, 4, 6 and 8 days, comprising the whole plots; manual hand weeding (unweeded control, weeding every 4, 8, and 12 weeks) representing the sub-plots; and herbicidal treatments (control, pendimethalin, glyphosate and pendimethalin plus glyphosate) allocated for thesub-sub-plots, on tuberose vegetative growth, clump growth characteristics, accompanied bulb & bulblet yield, water use efficiencies and nutrient contents in bulb tissues, during the 2001/2002 and 2002/2003 growing seasons.