Interferência De Plantas Daninhas Em Sorgo Sacarino Em Diferentes Espaçamentos No Semiárido Mineiro

Oliveira, Rafael Morroni de; Aspiazú, Ignácio; Silva, Karen Marcelle De Jesus; Portugal, Arley Figueiredo; Silva, Alexandre Ferreira; Carvalho, Abner José de

doi:10.18512/rbms.v15i3.566

Cited by 1 publication

(1 citation statement)

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“…The competition for light can make the plants invest more in the development of stems in detriment of other organs aiming to reach greater stature as a strategy to increase the capture of luminosity (Castro and Garcia 1996). Studies conducted by De Oliveira et al (2016) and Diniz et al (2017) on the cultivation of sorghum and studies conducted by Marques (2001) on the cultivation of crambe with 21 species of weeds and the studies of Amaral et al (2015) presented results that corroborate with the results found where the occurrence of weeds affects the growth of canola plants, because the crop cannot intercept a sufficient amount of light to develop properly (Li et al 2018).…”

Section: Resultssupporting

confidence: 60%

Periods of weed plant interference in canola

Brandler¹,

Galon²,

Mossi³

et al. 2021

Commun. Plant. Sci.

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The objective of this work was to determine the periods of interference of turnip, ryegrass and black oats infesting the canola crop. Two models of interference were studied: first, the canola cohabited with weeds for increasing periods up until 0, 7, 14, 21, 28, 35 and 42 days after the emergency (DAE) and throughout the cycle; second, the culture was kept free of the infestation for the same periods described previously. At 51 DAE, the variables related to canola and weed morphophysiology were determined. In the harvest of the crop, was measured the number of siliques, a thousand grain mass and grain yield. The physiological variables, photosynthetic rate, internal CO2 concentration, perspiration rate, stomach conductance of water vapors, carboxylation efficiency and efficient water use did not show significant variation. The dry mass was reduced by 79.21% when canola culture was always in competition with ryegrass, turnip and black oat weeds. The number of siliques and the mass of one thousand grains also decreased as the period of competition with the turnip, ryegrass and black oat weeds increased. The period before the interference (PAI) of the weeds ryegrass, turnip and black oats goes up to 25 DAE of canola. The critical interference prevention period (PCPI) for canola culture goes from 25 to 60 DAE. And the total interference prevention period (PTPI) is 60 DAE. Interference from weeds has reduced by 94.05% the productivity of canola grains when it has not received control of ryegrass, turnip and black oats.

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Section: Resultssupporting

confidence: 60%