Habilidade competitiva de genótipos de quinoa com papuã

Abstract

The study of the competitive ability between crops and weeds becomes relevant for the adoption of more sustainable control methods, with less environmental impact, lower costs to the producer and greater environmental protection. The objective of this work was to evaluate the competitive ability of quinoa genotypes in relation to papuã, in different proportions of plants in the association. The experiment was conducted in a completely randomized design with four replicates. Competitors tested included papuã and quinoa genotypes (Q 13 03, Q 13 24 and Q 13 31) in the proportions of 100: 0, 75:25, 50:50, 25:75 and 0: 100% or 20: 0, 15: 5, 10:10, 5:15 and 0:20 plante pot-1 - culture (plants: weed). At 50 days after the emergence of the species, the papuã tillering, or number of quinoa leaves, plant height, chlorophyll index, stalk / stem diameter, leaf area and dry mass species. The results showed that the papuã was more aggressive than the quinoa genotypes, mainly related to the variables plant height, chlorophyll index and leaf area for genotypes Q 13 03 and Q 13 24. Quinoa genotypes showed similar competitive ability, highlight the Q 13 31 that presented greater tolerance in the coexistence with the papuã. The most damaging competition for quinoa was interspecific, indicating the need for papua control even in low infestation.