The purpose of this research was to evaluate the effect of different mulching materials on lettuce (Lactuca sativa L. cv. Regina 2000) yield. The experimental design was randomized blocks, with five treatments (rice straw, coffee husk, Brachiaria brizantha L., sawing and control without mulching) and four repetitions. The number of leaves per plant and the dry and fresh matter accumulation were evaluated. All materials used as mulching, controlled the weed infestation. However, weed population was greater in the control whit reduction yield in comparison to the others treatments.
Lactuca sativa; mulching; weed
