Abstract
The effects of foliar application of Mo and use of N from cover crops (Crotalaria juncea L. and Canavalia ensiformis (L.) DC) on the performance of common beans were investigated in this study. Field experiments were carried out in a succession planting system (cover crops - common beans), and nitrate reductase activities were evaluated in the laboratory. The production of cover crops was done in a 2 x 4 factorial scheme installed in random blocks with four replications. The two cover crops sunn hemp and jack bean composed the first factor and the molibdenum doses (0, 40, 80, and 120 g ha-1) the second. These doses were applied as foliar fertilization using sodium molybdate (Na2MoO4) as Mo source. For bean cultivation, an unfertilized control treatment was evaluated.. Sunn hemp showed a linear positive response to Mo application in terms of shoot dry matter and N accumulation, while jack bean showed a quadratic negative response for shoot dry matter; for N accumulation, there was no adjustment of the regression models. Nitrate reductase activity in the common beans was up to three times higher at the Mo dose of 0 g ha-1 when compared to the treatments with Mo application to both cover crops. Cover crops or Mo doses had no significant effect on bean productivity.
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Claims 5
Claim · model-written summary
Sunn hemp shoot dry matter and N accumulation responded positively to Mo.
- Taxon
- Sunn hemp
Crotalaria junceae0 - Treatment
- Mo applicatione0
- Outcome
- shoot dry matter and N accumulatione0
- Direction
- linear positive responsee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sunn hemp showed a linear positive response to Mo application in terms of shoot dry matter and N accumulation”
Claim · model-written summary
Jack bean shoot dry matter had a quadratic negative response.
- Taxon
- jack bean
Canavalia ensiformise0 - Treatment
- molybdenumt0
- Outcome
- shoot dry mattere0
- Direction
- quadratic negative responsee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“jack bean showed a quadratic negative response for shoot dry matter”
t0“molybdenum”
Claim · model-written summary
Jack bean N accumulation had no regression model fit.
Verbatim
e0“for N accumulation, there was no adjustment of the regression models”
t0“cover crops”
Claim · model-written summary
Bean nitrate reductase activity was up to three times higher without cover crop Mo.
- Taxon
- common beans
Phaseolus vulgarise0 - Treatment
- Mo dose of 0 g ha-1e0
- Outcome
- Nitrate reductase activitye0
- Direction
- highere0
- Value
- up to three timese0
- Comparator
- treatments with Mo application to both cover cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrate reductase activity in the common beans was up to three times higher at the Mo dose of 0 g ha-1 when compared to the treatments with Mo application to both cover crops”
Claim · model-written summary
Cover crops and Mo doses had no significant effect on bean productivity.
- Taxon
- beane0
- Treatment
- Cover crops or Mo dosese0
- Outcome
- bean productivitye0
- Direction
- no significant effecte0
Not reportedComparator
Verbatim
e0“Cover crops or Mo doses had no significant effect on bean productivity”
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