Effect of Planting Densities of “Brs Princess” Banana Tree in the Suppression of Weeds

Abstract

-The objective is to evaluate the effects of plant density in banana crops against weed suppression. Six treatments were used: 1,200 (3.33 x 2.5 m), 1,600 (2.5 x 2.5 m), 2,000 (2.0 x 2.5 m), 2,400 (1.67 x 2.5 m), 2,800 (1.43 x 2.5 m) and 3,200 (1.25 x 2.5 m) banana plants per hectare, arranged in an experimental design of randomized blocks with four replications. The phytosociological study of weed communities was carried out one month after transplanting and then every 90 days, totaling six samples in 16 months of cultivation, always those being held 15 days after mowing. With the data of dry mass and number of individuals per species Relative density (De.R) Relative frequency (Fr.R) Relative dominance (Do.R), importance value value (IVI) of weed communities were calculated. Forty-three 43 species of weeds associated with the crop were identified, especially in the early stages of culture, of species such as Panicum maximum and nut grass. After 90 DAT it was found that the increase in the diversity of weed species, besides the reduction in IVI of P. maximum and C. rotundus, and increased IVI for species such as C. benghalensis and Vernonia cinerea, were more adapted to shade conditions. There was a reduction in the density dominance of weeds in higher plant density treatments, especially between 210 and 300 DAT. There was a change in the population of weeds, depending on the plant spacings in the banana crop.Keywords: banana crop, phytosociology, crop management. RESUMO -Objetivou

Yield of ‘Prata-Anã’ banana plants under water deficit and high plant density

“…Bras. Frutic., Jaboticabal, 2020, v. 42, n. 5: (e-046) and 5 m 2 m -2 resulted from increased plant density allow plants to intercept 95% of the photosynthetically active radiation (TURNER et al, 2007), positively affecting yield (PEREIRA et al, 2000;SCARPARE FILHO;KLUGE, 2001;ROSALES et al, 2008, CAVALCANTE et al, 2014ULLOA CORTAZAR et al, 2017;PRATA et al, 2018) as well as controlling weeds (LANZA et al, 2017;ULLOA CORTAZAR et al, 2017) and Sigatokas (CAVALCANTE et al, 2014) due to increased shading.…”

Weeds Associated with Banana Crops in Magdalena Department, Colombia

“…Likewise, there is agreement in both works when highlight the families Poaceae, Fabaceae, Asteraceae and Cyperaceae, as those of greater specific richness. Other studies of weed communities on banana crops in Brazil 9 (Lanza et al, 2017, Moura Filho et al, 2015, also report the Poaceae family as having the highest specific richness. Figure 2 -Grouping of the study zones based on the similarities of the weed communities.…”

Fitossociologia Em Pomares De Mangueira Irrigados Por Gotejamento E Microaspersão Em Condições Semiáridas

“…Em que: a = número de espécies ocorrentes na área irrigada por gotejamento, b = número de espécies ocorrentes na área irrigada por microaspersão c = número de espécies comuns às duas áreas. Ambos os pomares apresentaram baixa diversidade de plantas daninhas, levantamentos realizados em outras culturas identificaram maior número de espécies, sendo identificadas 43 espécies em pomar de bananeira (LANZA et al, 2017) e 13 em pomar de goiabeiras (LIMA et al, 2015).…”