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MANAGEMENT OF MAIZE STOVER WITH UNDERDOSES RATES OF GLYPHOSATE APPLICATIONS IN NO-TILLAGE Planta Daninha
JASPER,S. P.; PICOLI JR,G. J.; VELINI,E. D.; SOUSA,S. F. G.; CARBONARI,C. A..
ABSTRACTGlyphosate has significant effects on the growth and development of plants when in underdoses. This work was developed to verify the effect of the application of glyphosate in underdoses in lignin synthesis and consequently decomposition of maize stover. Two experiments were conducted; the first one in a greenhouse for underdoses adjustments and the second one in the production area. The experimental design of the first trial was completely randomized with four replications. The treatments consisted in the application of the underdoses: 0, 25, 50 and 100 g ha-1 of glyphosate. In the production area, the experimental design was a randomized block with four replications, in underdoses: 0, 12.5, 25 and 50 g ha-1. The results were submitted to analysis...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Stover decomposition; Lignification; Growth stimulus.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300543
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MAIZE STOVER DEGRADATION UNDER THE INFLUENCE OF HALOXYFOP-METHYL UNDERDOSES Planta Daninha
JASPER,S.P.; VELINI,E.D.; PICOLI JR.,G.J.; CARBONARI,C.A.; SILVA,P.R.A..
ABSTRACT One of the major constraints to sustainable tillage is the rapid decomposition of the dry matter. The mechanism known to facilitate this process is the interference in the metabolic pathways of lignin polymers from spraying herbicide underdoses. This study has aimed to verify the effect of underdoses of haloxyfop-methyl in the synthesis of lignin and correlate the interference of this phenolic compound in the decomposition of maize stover. Two preliminary experiments were carried out in a greenhouse to set up the best underdoses to be applied in the yield area experiment. The treatments in the first experiment consisted of: 0; 2.5; 5 and 10 g a.i. ha-1 of haloxyfop-methyl herbicide. And in the second experiment: 0; 0.625; 1.25 and 2.5 g a.i. ha-1...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Herbicide; Levels of lignin; Growth stimulus.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300509
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Nitrogen availability and glyphosate hormesis on white oat Planta Daninha
R.O. Silva,Diecson; A. Silva,Álvaro A.; D. Novello,Bruna; Rieder,Eduardo; M. Aguiar,Adalin C.; J. Basso,Claudir.
Abstract Background: The effect of low rates of glyphosate has been widely studied in several crops. Low nitrogen stress reduces carbohydrate synthesis and we hypothesize that hormesis from glyphosate occurs at low nitrogen availability. Objective: To evaluate the effects of glyphosate hormesis at different levels of nitrogen on the growth and yield of white oat. Methods: A two-factor factorial (2x7) was conducted in field testing at nitrogen levels (50 and 90 kg ha-1) and low rates of glyphosate rates (0 - 180 g a.e. ha-1). The glyphosate was applied at the second node already formed. The growth and yield were evaluated. Results: Plant height was not affected by the nitrogen levels. A low rate of glyphosate induced a plant height increase up of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Avena sativa; Low rate; Herbicide; Growth stimulus; Yield.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100323
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