Abstract
Molybdenum (Mo) foliar spray may improve the nitrogen acquisition by the plants and increase the crop yield. The effects of Mo foliar spray on nitrogen nutrition, achene yield and yield components of sunflower were investigate in this study. The experiment was carried out on a Rhodic Hapludox in Chavantes, São Paulo, Brazil under conventional tillage system. Treatments consisted of five Mo concentrations [0 (control), 26, 52, 78 and 104 g ha–1 of Mo] applied as foliar spray at the growing stage of eight developed leaves – V8 (18 days after plants emergence). Foliar application of Mo rates reduced the nitrate (NO3–) concentration, and increased the concentrations of ammonium (NH4+), total nitrogen (N) and Mo in the leaf tissue of sunflower. Molybdenum foliar spray did not affect the plant height, stem diameter, capitulum diameter and number of achenes per capitulum of sunflower. Application of 58 and 68 g ha–1 of Mo resulted in increased of the thousand achenes mass (40%) and achene yield (27%) of sunflower, respectively, compared to the control. Molybdenum foliar spray improves the nitrogen nutrition and the achenes mass resulting in the increased achene yield of sunflower. Results suggest that Mo deficiency can compromise the nitrogen metabolism of plants, and result in lower achene yield of sunflower. Key words: Helianthus annuus L., molybdoenzymes, nitrate assimilation, plant nutrition.
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Claims 5
Claim · model-written summary
Mo foliar application reduced leaf nitrate concentration.
- Taxon
- sunflower
Helianthus annuuse1 - Organ / stage
- leaf tissuee1
- Treatment
- Foliar application of Mo ratese0
- Outcome
- nitrate (NO3–) concentratione0
- Direction
- reducede0
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of Mo rates reduced the nitrate (NO3–) concentration”
e1“leaf tissue of sunflower”
e2“0 (control)”
Claim · model-written summary
Mo foliar application increased leaf ammonium, total nitrogen and Mo concentrations.
- Taxon
- sunflowerHelianthus annuuse0
- Organ / stage
- leaf tissuee0
- Treatment
- Mo foliar spraye1
- Outcome
- concentrations of ammonium (NH4+), total nitrogen (N) and Moe0
- Direction
- increasede0
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the concentrations of ammonium (NH4+), total nitrogen (N) and Mo in the leaf tissue of sunflower”
e1“Mo foliar spray”
e2“0 (control)”
Claim · model-written summary
Mo foliar spray did not affect plant height, stem or capitulum diameter, or achenes per capitulum.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- Molybdenum foliar spraye0
- Outcome
- plant height, stem diameter, capitulum diameter and number of achenes per capitulume0
- Direction
- did not affecte0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Molybdenum foliar spray did not affect the plant height, stem diameter, capitulum diameter and number of achenes per capitulum of sunflower”
e1“0 (control)”
Claim · model-written summary
Applying 58 g ha–1 Mo increased thousand achenes mass by 40% versus control.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- 58 and 68 g ha–1 of Moe0
- Outcome
- thousand achenes masse0
- Direction
- increasede0
- Value
- 40%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 58 and 68 g ha–1 of Mo resulted in increased of the thousand achenes mass (40%) and achene yield (27%) of sunflower, respectively, compared to the control”
Claim · model-written summary
Applying 68 g ha–1 Mo increased sunflower achene yield by 27% versus control.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- 58 and 68 g ha–1 of Moe0
- Outcome
- achene yielde0
- Direction
- increasede0
- Value
- 27%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 58 and 68 g ha–1 of Mo resulted in increased of the thousand achenes mass (40%) and achene yield (27%) of sunflower, respectively, compared to the control”
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