Abstract
In order to evaluate the influence of different nitrogen rates on the hormetic effect of glyphosate on common bean crop, proposed to study the combination of nitrogen fertilization in succession to low glyphosate doses. The study was conducted under field conditions at the experimental farm of the State University of São Paulo-UNESP, Ilha Solteira campus, located in the city of Selvíria-MS, Brazil. The experimental design was a randomized block with split plots arranged in four blocks. The plots were composed of four glyphosate doses (0, 7.2, 14.4 and 21.6 g of acid equivalent (AE) ha-1) and the subplots were composed of five nitrogen doses (0, 15, 30, 45 and 60 kg ha-1), with urea as the source. Bean growth was stimulated with a maximum point in the 11 g AE ha-1 sub-dose of glyphosate, however, only in the absence of nitrogen under cover. Leaf N content was higher at the estimated 12 and 11 g AE ha-1 glyphosate doses with 30 and 45 kg ha-1 nitrogen. Hormetic effect on yield was obtained with increments of up to 500 kg ha-1 or 21% at the estimated 10 g AE ha-1 low glyphsate dose. Cooking time was affected by low glyphosate doses, depending on the amount of nitrogen. It was possible to prove the influence of nitrogen on glyphosate hormesis in common bean for dry matter mass, leaf N content, grain yield and cooking time.
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Claims 4
Claim · model-written summary
Low-dose glyphosate stimulated bean growth most near 11 g AE ha-1 only without nitrogen topdressing.
- Taxon
- common bean
Phaseolus vulgarist0 - Treatment
- 11 g AE ha-1 sub-dose of glyphosatee0
- Outcome
- Bean growthe0
- Direction
- stimulatede0
- Qualifier
- only in the absence of nitrogen under covere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“Bean growth was stimulated with a maximum point in the 11 g AE ha-1 sub-dose of glyphosate, however, only in the absence of nitrogen under cover.”
Claim · model-written summary
Leaf N content was higher near 12 g AE ha-1 glyphosate with 30 kg ha-1 nitrogen.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- 12 and 11 g AE ha-1 glyphosate dosese0
- Outcome
- Leaf N contente0
- Direction
- highere0
- Qualifier
- 30 and 45 kg ha-1 nitrogene0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“Leaf N content was higher at the estimated 12 and 11 g AE ha-1 glyphosate doses with 30 and 45 kg ha-1 nitrogen.”
Claim · model-written summary
Glyphosate hormesis raised grain yield by up to 500 kg ha-1 or 21% near 10 g AE ha-1.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- 10 g AE ha-1 low glyphsate dosee0
- Outcome
- yielde0
- Direction
- incrementse0
- Value
- up to 500 kg ha-1 or 21%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“Hormetic effect on yield was obtained with increments of up to 500 kg ha-1 or 21% at the estimated 10 g AE ha-1 low glyphsate dose.”
Claim · model-written summary
Low glyphosate doses affected cooking time depending on nitrogen amount.
- Taxon
- common beanPhaseolus vulgarist0
- Treatment
- low glyphosate dosese0
- Outcome
- Cooking timee0
- Qualifier
- depending on the amount of nitrogene0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“common bean”
e0“Cooking time was affected by low glyphosate doses, depending on the amount of nitrogen.”
The same questions in other papers
glyphosate · growth · Phaseolus vulgaris (common bean)Results differ
1 paper in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
1 paper more in this group
See all 5 papers →glyphosate · nutrient: content · Phaseolus vulgaris (common bean)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.