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

Abstract

RESUMO: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 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-defrango. Palavras-chave: Planta medicinais, população de plantas, resíduo orgânicoABSTRACT: Spacing among plants and soil covering with poultry litter in burdock (Arctium lappa L.) production. 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 ) 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 ) of burdock, respectively, were not significantly influenced by spacing but by soil covering with poultry litter.

Growing of tropical black sage and chemical composition of the essential oil

“…This provides higher plants per unit area in the smaller spacing, with better interception of solar radiation, higher photosynthesis rate and among other factors, which consequently increase the efficiency of water and soil nutrient uptake (Taiz and Zeiger, 2004). Munarin et al (2010) did not observe significant interaction between spacings and soil cover with chicken litter, working with the medicinal burdock species (Arctium lappa L.). However, they affirm that the smaller spacing (0.40 m) influenced the increase of the fresh matter production of the plants, because in smaller spacings, the metabolic processes of the plants became more efficient, favoring the best use of the resources in the environment.…”

“…The averages followed by the same letter do not differ by the F test (p ≤ 0.01). Munarin et al (2010) observed that the smaller spacing for burdock plants (0.40 cm) resulted in higher leaf dry mass production. The authors suggest that probably the plants did not reach population pressure that would reduce their total productive capacity, due to competition for growth factors such as photosynthetically active solar radiation, water and nutrients, which would promote a decrease in the productivity of cultivated plants.…”

NMR Metabolomics of Arctium lappa L., Taraxacum officinale and Melissa officinalis: A Comparison of Spontaneous and Organic Ecotypes

“…Among several officinal plants, Burdock ( Arctium lappa L.), Dandelion ( Taraxacum officinale ), and Lemon balm (Melissa officinalis ) have been used for their edible and medicinal properties [ 4 , 5 , 6 , 7 , 8 , 9 ].…”