Aplicação de glyphosate na dessecação do sorgo biomassa

May, A.; Viana, Ronaldo da Silva; Santos, Michelli de Souza dos; Silva, Evandro Henrique Figueiredo Moura da

doi:10.7824/rbh.v15i4.487

Cited by 3 publications

(4 citation statements)

References 7 publications

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“…Our results corroborate those found by May et al (2016) who evaluated the application of four doses of glyphosate (0, 720, 1,440, 2,160 and 2,880 g a.i. ha -1 ) in greenhouse biomass sorghum after 7, 14, 21 and 28 days after application.…”

Section: Resultssupporting

confidence: 91%

“…Several studies have already demonstrated the efficiency of pre-harvest desiccation in soybean (Pinto et al, 2016), beans (Silva et al, 2017), rice, canola (Zhang & Van Vekdhuizen, 2016) and wheat (Krenchinsk et al, 2017). However, there are few research records that have evaluated the application of pre-harvest herbicides to reduce moisture in biomass crops and there are no published studies that have evaluated the effect of herbicides in desiccation of biomass sorghum (Costa et al, 2018;May et al, 2016). In this sense, the objective was to evaluate the use of herbicides in pre-harvest of biomass sorghum for moisture removal and their effect calorific power.…”

Section: Introductionmentioning

confidence: 99%

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Pre-harvest desiccation in biomass sorghum with herbicides

et al. 2020

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The purpose of this study was to assess the effect of different herbicide treatments on moisture removal and calorific power of biomass sorghum for co-generation of electric energy through burning. The experiment was conducted in randomized complete block design with four replicates per treatment and a 6x4 factorial scheme (six herbicide treatments x four intervals between spraying and harvesting). The herbicide treatments were: two different doses of glyphosate (1.92 kg a.i. ha-1 and 3.84 Kg a.i. ha-1), paraquat (0.4 Kg a.i. ha-1), a commercial mixture of paraquat + diuron (0.6 + 0.3 Kg a.i. ha-1), glufosinate-ammonium (0.8 Kg a.i. ha-1) and control (unsprayed). The intervals between spraying and harvesting assessed were 7, 14, 21 and 28 days after desiccation (DAD). It was assessed: the number of leaves per plant, moisture content of leaves, panicles, culm and whole ground plants and Superior Calorific Power (SCP). The herbicides paraquat and paraquat + diuron promotes defoliation, after 14 DAD. Glyphosate, paraquat, paraquat + diuron and glufosinateammonium reduce leaf and panicle moisture, despite only glyphosate reduces moisture in the culm. The herbicides do not affect the SCP of biomass sorghum. Therefore, the herbicides, especially glyphosate, have high potential for preharvest desiccation in biomass sorghum.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Pre-harvest desiccation in biomass sorghum with herbicides

et al. 2020

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“…Glyphosate is found in several formulations, all of which have the same mechanism of action, but varying regarding the salts that compose it (May et al, 2016). Isopropylamine, ammonium, and potassium stand out among these salts, which have no herbicidal activity, but they are converted into an acidic form with herbicidal activity when absorbed by the plant (D'Amato, 2017).…”

Section: Introductionmentioning

confidence: 99%

WATER HARDNESS AND pH IN THE EFFECTIVENESS OF GLYPHOSATE FORMULATIONS

et al. 2020

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The hardness and pH of the spray water can interfere with the weed control effectiveness with herbicides, but it is not clear the magnitude of this interference, mainly associating different levels of pH and hardness to different glyphosate formulations. This study aimed to evaluate the influence of hardness and pH, in association, of the water used in the application of two glyphosate formulations on the weed control effectiveness. The experiment was conducted in duplicate, in areas with a predominance of Digitaria horizontalis, under a randomized block design with a 4×4×2+1 factorial scheme, composed of four water hardness levels (70, 110, 230, and 430 ppm CaCO3), four pH levels (3.5, 4.5, 5.5, and 6.5), two glyphosate formulations (ammonium salt and potassium salt), and control without application, with four repetitions. The physicochemical characteristics of the spray solutions and the weed control effectiveness were evaluated at 7, 14, and 21 days after application (DAA). The water pH at the studied range did not interfere with the control effectiveness. The increase in hardness reduced the control at 7 DAA, but this difference was not noticed after 21 DAA. Glyphosate ammonium salt promoted higher control of D. horizontalis than that with potassium salt, regardless of water hardness and pH.

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“…The herbicide glyphosate is widely used for desiccating different plant species, including those for straw formation in the no-tillage system (May et al, 2016;Santos et al, 2016;Timossi et al, 2016). Among its characteristics are the low cost, fast degradation, broad spectrum of action, and low toxicity to mammals.…”

Section: Introductionmentioning

confidence: 99%

Productivity, Control, and Decomposition of Irrigated Forage Species under Glyphosate Doses and Shading

et al. 2018

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Light intensity available in growing environments may influence the susceptibility of plants to glyphosate and decomposition of their residues. This study aimed to assess the productivity, control, and decomposition of forage straw submitted to glyphosate doses and exposed to full sun and 50% shade. Two experiments were carried out, one for Piatã grass (Urochloa brizantha cv. Piatã) and other for Tanzania grass (Megathyrsus maximus cv. Tanzania). The experimental design was a randomized block design with strip-plot and four replications. Two growing environments (at full sun and under 50% shade) were installed in strips in the growing area, combined with six doses of glyphosate (0, 360, 720, 1,080, 1,440, and 1,800 g a.e. ha-1) used for forage desiccation. Shade did not change Tanzania grass productivity (p<0.05), but it reduced Piatã grass productivity (p>0.05), suggesting its low tolerance to light restriction. Tanzania grass is more tolerant to glyphosate when compared to Piatã grass, especially at full sun conditions. In general, the evaluated forages present a high susceptibility to glyphosate as incident radiation is reduced, which allows using lower doses to desiccate them in shaded environments. Straw decomposition of Piatã and Tanzania grasses was slower under shading. In this environment with light restriction, straw is more durable and has a better quality for the no-tillage system.

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Aplicação de glyphosate na dessecação do sorgo biomassa

Cited by 3 publications

References 7 publications

Pre-harvest desiccation in biomass sorghum with herbicides

Pre-harvest desiccation in biomass sorghum with herbicides

WATER HARDNESS AND pH IN THE EFFECTIVENESS OF GLYPHOSATE FORMULATIONS

Productivity, Control, and Decomposition of Irrigated Forage Species under Glyphosate Doses and Shading

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