Abstract
Management of boron (B) in soils can be difficult since a narrow range exists between plant deficiency and toxicity. A greenhouse study was conducted to evaluate the effectiveness of four soil-applied B fertilizers varying in solubility (Granubor, Hydroboracite, Ulexite, and Colemanite) in supplying B to alfalfa (Medicago sativa L.). Boron was incorporated at rates of 0, 1, or 2 mg B kg−1 into Norfolk (fine-loamy, kaolinitic, thermic, Typic Kandiudults) or a Cecil (fine, kaolinitic, thermic Typic Kanhapludults) soil and planted with alfalfa. After establishment, shoots were harvested four times at approximately five-week intervals and analyzed for dry matter and B. Following the last harvest, soil samples were taken and analyzed for Mehlich-1 extractable B. There was no effect of fertilizer material, application rate, or their interaction on the dry weight of alfalfa. Boron concentrations in alfalfa did not significantly decline with each successive cutting, indicating that a sufficient amount was applied for the duration of the study. In the first cutting, plants grown with Granubor and Ulexite had higher concentrations of B than those with Hydroboracite, which was in turn higher than Colemanite, reflecting differences in solubility. However, by the third and fourth cuttings, there were no significant differences in tissue B concentrations among the four fertilizer sources. This indicates that given adequate time, even less-soluble fertilizer sources may provide sufficient B to growing plants.
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Claims 5
Claim · model-written summary
Fertilizer material and rate had no effect on alfalfa dry weight.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- fertilizer material, application rate, or their interactione0
- Outcome
- dry weighte0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no effect of fertilizer material, application rate, or their interaction on the dry weight of alfalfa.”
Claim · model-written summary
Alfalfa boron concentrations did not significantly decline with successive cuttings.
- Taxon
- alfalfaMedicago sativae0
- Organ / stage
- cuttinge0
- Outcome
- Boron concentrationse0
- Direction
- did not significantly declinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boron concentrations in alfalfa did not significantly decline with each successive cutting”
Claim · model-written summary
First-cutting alfalfa had higher boron concentration with Granubor and Ulexite than Hydroboracite.
- Taxon
- alfalfaMedicago sativae1
- Organ / stage
- first cuttinge0
- Treatment
- Granubor and Ulexitee0
- Outcome
- concentrations of Be0
- Direction
- highere0
- Comparator
- Hydroboracitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first cutting, plants grown with Granubor and Ulexite had higher concentrations of B than those with Hydroboracite”
e1“supplying B to alfalfa”
Claim · model-written summary
First-cutting alfalfa had higher boron concentration with Hydroboracite than Colemanite.
- Taxon
- alfalfaMedicago sativae2
- Organ / stage
- first cuttinge1
- Treatment
- Hydroboracitee0
- Outcome
- concentrations of Be1
- Direction
- highere0
- Comparator
- Colemanitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hydroboracite, which was in turn higher than Colemanite”
e1“In the first cutting, plants grown with Granubor and Ulexite had higher concentrations of B”
e2“supplying B to alfalfa”
Claim · model-written summary
Third and fourth cuttings showed no significant tissue boron differences among the four sources.
- Taxon
- alfalfaMedicago sativae1
- Organ / stage
- third and fourth cuttingse0
- Treatment
- four fertilizer sourcese0
- Outcome
- tissue B concentrationse0
- Direction
- no significant differencese0
- Comparator
- four fertilizer sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by the third and fourth cuttings, there were no significant differences in tissue B concentrations among the four fertilizer sources”
e1“supplying B to alfalfa”
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