Competition of maize hybrids with alexandergrass (Urochloa plantaginea)

• DOI: 10.21475/ajcs.19.13.09.p1540
• Publication Date: 2020-07-29T03:39:55Z
• Authors: Fernando Frandoloso; Leandro Galon; Ricardo Luis Gabi...; Felipe Bianchessi; Cinthia Maethê Holz; André Dalponte Me...; Carlos Orestes Sa...; Francisco Wilson ...; Milena Barretta F...; Maico André Miche...; Luciane Renata Ag...; César Tiago Forte
• Keywords: 2. Zero hunger; 0401 agriculture, forestry, and fisheries; 04 agricultural and veterinary sciences

Maize is one of the world's major cereals, and alexandergrass most damaging weed in crop. The objective this work was to evaluate relative competitive ability maize hybrids presence through replacement series experiments. experiments were set up a complete randomized block design, with four replications. Firstly, for as well alexandergrass, plant population determined which final production becomes constant. composed plastic pots capacity 8 dm3, each experimental unit placed proportion corresponding treatment (100: 00, 75:25, 50:50, 25:75 0: 100) unit, species competing or not between them. For hybrid, separate experiment considered evaluating intra interspecific competition. analysis competitiveness carried out diagrams applied by indexes. At 50 days after emergence leaf area (LA) dry mass aerial part (DM) plants checked. competition occured among being negatively affected both species, independently causing reductions LA DM maize. Interspecific causes less damage than intraspecific There basically same environment resources (water, CO2, sun light nutrients) crop more weed.