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O objetivo do trabalho foi estudar o crescimento, o desenvolvimento e a produção da bardana em resposta a cinco espaçamentos entre plantas (40,0; 47,5; 55,0; 62,5 e 70,0 cm) e ao uso (CCF) ou não (SCF) de cobertura de solo com cama-de-frango semidecomposta. Os dez tratamentos foram arranjados como fatorial 5x2, no delineamento experimental blocos casualizados, com quatro repetições. As plantas foram propagadas inicialmente em berços de isopor e, posteriormente, em canteiros, arranjadas em fileiras duplas, espaçadas de 0,50 m entre fileiras simples e 1,0 m entre fileiras duplas. As avaliações de altura foram feitas a partir de 30 dias até 180 dias quando foi feita a colheita. As médias de altura (172 cm) e área foliar (20.704 cm-2) das plantas e as médias de comprimento (23,6 cm) e diâmetro das raízes (16,2 mm) não foram influenciadas significativamente pelos espaçamentos nem pela cobertura ou não do solo. Os maiores e menores valores para massas fresca (25.676 kg ha-1 e 15.217 kg ha-1) e seca (1.941,02 kg ha-1 e 1.104,61 kg ha-1) de folhas, para o número de raízes (490.750 ha-1 e 272.120 ha-1) e para as massas fresca (5.080,35 kg ha-1 e 3.546,25 kg ha-1) e seca (1.448,91 kg ha-1 e 1.051,31 kg ha-1) de raízes foram encontrados com os espaçamentos de 40,0 cm e de 70,0 cm entre plantas, respectivamente, mostrando decréscimo linear na medida em que aumentaram os espaçamentos. Os teores de nitrogênio (N) e de fósforo (P), respectivamente, nas massas secas de folhas (12,84 g kg-1 e 0,33 g kg-1) e de raízes (4,11 g kg-1 e 0,13 g kg-1) de bardana não foram influenciados significativamente pelos espaçamentos, mas sim pela cobertura ou não do solo com cama-de-frango. The aim of this work was to study the growth, development and production of burdock in response to five spacing levels among plants (40.0; 47.5; 55.0; 62.5; and 70.0 cm) and to the use (CCF) or not (SCF) of soil covering with semi-decomposed poultry litter. Experimental design was in randomized blocks, with four replicates, in a 5x2 factorial arrangement, with ten treatments. Plants were initially propagated in polystyrene plates; then, they were placed in flower beds and displayed in double rows, with 0.50m spacing between simple rows and 1.0m between double rows. Height was evaluated from 30 to 180 days, when harvest was performed. Mean height (172 cm), leaf area (20,704 cm²), root length (23.6 cm) and diameter (16.2 mm) were not significantly influenced by spacing or soil covering. The highest and lowest values of leaf fresh (25,676 kg ha-1 and 15,217 kg ha-1) and dry matter (1,941.02 kg ha-1 and 1,104.61 kg ha-1), root number (490,750 ha-1and 272,120 ha-1) and fresh (5,080.35 kg ha-1 and 3,546.25 kg ha-1) and dry matter (1,448.91 kg ha-1 and 1,051.31 kg ha-1) were obtained at 40.0 and 70.0cm spacing between plants, respectively, which shows a linear decrease with spacing increase. Nitrogen (N) and phosphorous (P) levels, in dry matter of leaves (12.84 g kg-1 and 0.33 g kg-1) and roots (4.11 g kg-1 and 0.13 g kg-1) of burdock, respectively, were not significantly influenced by spacing but by soil covering with poultry litter

Espaçamentos entre plantas e cobertura do solo com cama-de-frango na produção da bardana (Arctium lappa L.)