FERTIACTYL® POST IN THE DECREASE OF PHYTOTOXICITY OF HERBICIDE ROUNDUP READY® IN SOYBEAN PLANTATIONS
Keywords:
Glycine max L., Weed control, Low rainfall rate, Brazilian savannah
Abstract
In spite of resistance under certain conditions, genetically modified soybean revealed damages caused by the herbicide Roundup Ready. The capacity of Fertiactyl® Pós technology in the reduction of the phytotoxicity of the herbicide Roundup Ready® on the production of soybeans is investigated. Experimental design comprised randomized blocks with five replications and three replicates in each replication. The five treatments comprised the application of the foliar fertilizers Fertiactyl® Pós at doses 0; 0.4; 0.8; 1.2 and 1.6 L ha-1 plus herbicide Roundup Ready®. The herbicide was applied at a fixed dose of 2.0 L ha-1 , with the following treatments: T1 – Roundup Ready® + 0 L ha-1 Fertiactyl® Pós; T2 – Roundup Ready® + 0.4 L ha-1 Fertiactyl® Pós; T3 – Roundup Ready® + 0.8 L ha-1 Fertiactyl® Pós; T4 – Roundup Ready® + 1.2 L ha-1 Fertiactyl® Pós; and T5 – Roundup Ready® + 1.6 L ha-1 Fertiactyl® Pós. Production indexes, such as plant height (cm), root length (cm) and the weight of 100 grains (g), were not significant at increasing doses of foliar fertilizer. Amount of pods per plant and productivity (sack ha-1) increased with Fertiactyl Pós®. Fertiactyl® Pós application reduced the phytotoxic effect of the herbicide Roundup Ready® and hydric stress on soybean plants Pioneer 98Y30® with an increase in productivity by at least 0.7 sacks ha-1 at 0.45 L ha-1 of Fertiactyl® Post, after 27 days without any rain. Dose 0.4 L ha-1 recommended by the manufacturer should be the highest dose used in soybean plantations.
Published
2018-03-29
Section
Agrobusiness
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