Initial interference of Cyperus rotundus L. in pre-sprouted seedlings of sugarcane cultivars RB985476 and IACSP95-5000
Interferencia inicial de Cyperus rotundus L. en plántulas pre-brotadas de caña de azúcar cultivares RB985476 e IACSP95-5000
DOI:
https://doi.org/10.15446/agron.colomb.v36n3.73317Keywords:
competition, Cyperaceae, densities, Saccharum spp. (en)Competencia, Cyperaceae, densidades, Saccharum spp. (es)
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Weeds compete with plants for water, light, nutrients and space. In sugarcane, planting pre-sprouted sugarcane seedlings (PSS) may mean a change in weed interference and management. The aim of this study was to generate information on the interference of Cyperus rotundus L. in PSS. Two experiments were carried out in a completely randomized design, one with cultivar RB985476, with seven densities of C. rotundus (0, 17, 35, 70, 140, 280 and 560 plants m-2), and the second with cultivar IACSP95-5000, with four densities of C. rotundus (0, 70, 140 and 280 plants m-2). For this weed, a 2x6 factorial design was used for the experiment with RB985476 and a 2x3 design was used for IACSP95-5000, the first factor being absence and presence of the crop, and the second factor the densities of the species. Biometric evaluations of height, diameter, number of tillers and leaves, leaf area and dry mass were carried out. The PSS had a reduction in height, number of leaves and leaf area in the main till at 60 d after planting (DAP) in RB985476. For the IACSP95-5000 cultivar, there was no reduction in the analyzed variables. The average dry mass per plant of C. rotundus decreased as the density of the species increased in the absence of PSS.
Las malezas compiten con las plantas cultivadas por el agua, la luz, los nutrientes y el espacio. En la caña de azúcar, la siembra con plántulas pre brotadas de caña de azúcar (PPB) puede significar un cambio en la interferencia y el manejo de las malezas. El objetivo de este trabajo fue evaluar la interferencia de Cyperus rotundus L. en plántulas pre-brotadas (PPB) de caña de azúcar. Se realizaron dos experimentos en invernadero, en diseño completamente al azar, uno con el cultivar RB985476, con siete densidades de C. rotundus (0, 17, 35, 70, 140, 280 y 560 plantas m-2). El segundo con el cultivar IACSP95-5000, con cuatro densidades de C. rotundus (0, 70, 140 y 280 plantas m-2). Para la maleza se adoptó un arreglo factorial de 2x6 para el experimento con RB985476 y 2x3 para IACSP95-5000, con el primer factor siendo la ausencia y presencia de caña de azúcar y el segundo factor las densidades de la especie. Se realizaron evaluaciones de altura, diámetro, número de perfiles y hojas, área foliar y masa seca de la parte aérea. Las PPB tuvieron reducción en altura, número de hojas y área foliar del perfil principal a los 60 días después del plantío en la RB985476. Para la variedad IACSP95-5000, no hubo reducción en las variables analizadas. La masa seca media por planta de C. rotundus se redujo con el aumento de la densidad de la especie en ausencia de PPB.
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1. Ana Ligia Giraldeli, André Felipe Moreira Silva, Ana Carolina Viviani Pagenotto, Luísa Carolina Baccin, Lucas da Silva Araújo, Gustavo Soares da Silva, Felipe Carrara de Brito, Ricardo Victoria Filho. (2022). Weed interference periods in pre-sprouted sugarcane seedlings. International Journal of Pest Management, , p.1. https://doi.org/10.1080/09670874.2022.2051641.
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