Banca de DEFESA: ADILSON MIGUEL DA SILVA JUNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ADILSON MIGUEL DA SILVA JUNIOR
DATE: 25/05/2021
TIME: 09:00
LOCAL: Sete Lagoas (modo virtual)
TITLE:

TANK MIX OF GLYPHOSATE WITH FOLIAR FERTILIZERS IN THE  WEED CONTROL AND SOYBEAN PRODUCTIVITY

KEY WORDS:

Glycine max, chemical control, herbicide-foliar fertilizer interaction, antagonism, synergism, compatibility.

 

PAGES: 48
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Manejo e Tratos Culturais
SUMMARY:

Weeds can cause high damage to soybean crops, so tools should be sought to manage them, such as tank mixing, but the effect of mixing herbicides and foliar fertilizers on both soybean crop and weed can be different. Thus, this study aimed to evaluate the effect of mixtures between glyphosate and foliar fertilizers on weed control and on soybean development and productivity. The experiment was carried out in the experimental area of Embrapa Milho e Sorgo, in Sete Lagoas, Minas Gerais State, Brazil, in a randomized block design. The 16 treatments were applications of: glyphosate (720 g a.e and 1296 g a.e ha^-1) associated with different foliar fertilizers, in stage V4 of soybeans, and two controls, one with weeding until the crop canopy closure and the other without weeding throughout its cycle. For evaluations of weed control and phytotoxicity in soybeans, scores were given using a scale from 0 to 100, at seven-day intervals, where 0 meant no control and 100% total control. In relation to soybean were evaluated plant height, number of leafs, number of nodes, height at maturity, height of insertion of the first pod, dry matter of stem, leaf, petiole and pod, leaf area, number of pods per plant, number of pods with one, two, three and four grains, number of grains per pod, 100-seed weight  and grain yield. The data were submitted to analysis of variance and the means compared by the Scott Knott test (p ≤ 0.05). The original phytointoxication data were transformed into √x + 1. The soybean submitted to the application of glyphosate (1296 g a.e ha^-1) + Quimifol Cerrado® (1.0 L ha^-1) + Urea (22.4 g ha^-1) + Aureo® (0.15 L ha^-1) presented phytotoxicity of 33.75%. The mixtures did not control the Commelina benghalensis plants, with control levels <35%. Portulaca oleracea and Eleusine indica plants were controlled by glyphosate applied isolated (> 95%). Mixtures of glyphosate (720 g a.e and 1296 g e.a ha^-1) with different leaf fertilizers did not result in an increase in the effectiveness of weed control, these associations also do not alter most of the morphological and productive characters of the cultivar RK6813 RR. However, the application of the mixture of glyphosate (1296 g a.e ha^-1) + Urea (111.5 g ha^-1) + Admix Wet (0.15 L ha^-1), resulted in higher grain yield and dry matter stem.

 

BANKING MEMBERS:
Presidente - 2253801 - AMILTON FERREIRA DA SILVA
Interna - 3125822 - ALINE DE ALMEIDA VASCONCELOS
Externo à Instituição - EMERSON BORGHI