Weed extract effect on growth and yield of some corn varieties

Abstract

Abstract One of the impacts of climate change in agriculture is on the diversity of crop pests, plant diseases and weeds. In addition to competition, weeds can suppress growth through alelopathy. The effect of alelopathy can be caused by the presence of alelochemicals produced by weeds. This research aims to gain the influence of weed extract on the growth and yield of some varieties of corn. The study used a complete randomized design with 2 treatment factors namely corn varieties and weed extract. Corn varieties consist of Bisi 18, NK 33, DK 95 and Sukmaraga. Weed extract consists of without weed extract, weed extract grown on corn plants with fertilization 25 kgN.ha-1, weed extract at fertilization 150 kgN.ha-1, and weed extract at fertilization 275 kgN.ha-1. The observed parameters include the plant height, the number of leaves, stem diameter, the length of the leaves, the width of the leaves, the angle of the leaves, the dry weight of the plant, the weight of seeds per plant. Data analysis using analysis of variance and a Duncan Multiple Range Test level of 5%. The results showed that weed extract does not affect the number of leaves, leaf length, leaf width, leaf angle, stem diameter, dry weight of the plant, and seed weight per plant. Weed extract from fertilization 275 kgN.ha-1 lowers the height of corn plants.