The Effect of Weed Control at Different Plant Spacing on Growth and Yield of Shallots (Allium ascalonicum L.)

Abstract

Weeds are one of the shallot problems because they compete with the plants for nutrients, light, water, and a place to grow. The research to determine the effect of weed control at different spacings used a Split Plot Design. The main plots were plant spacing, consisting of 10 cm × 10 cm, 15 cm × 15 cm, 20 cm × 20 cm (J3). Weed control was as sub-plots consisting of weed-free, weeding 14, 28, and 42 DAP (Days After Planting), pre-emergence herbicide oxyfluorfen + weeding 28 and 42 DAP and silver black plastic mulch + weeding 28 and 42 DAP. The results showed that the dry weight of weeds was significantly smaller at plant spacing of 15 cm × 15 cm  and a plant spacing of 20 cm × 20 cm. Plant height was higher at plant spacing of 10 cm × 10 cm. The number of tillers and tuber dry weight per plant was higher at a plant spacing of 20 cm × 20 cm. The yield of tubers was higher at plant spacing of 10 cm × 10 cm  than at plant spacing of 15 cm × 15 cm  and plant spacing of 20 cm × 20 cm. There were no significant differences in plant height, number of tillers, and tuber yield of shallot plants between weed control treatments.

Keywords: growth, herbicide, mulch, spacing, weeding, weeds, yield