Claim · model-written summary
Reducing NH4+-N in favour of NO3- supply and adding supplemental Ca reduced the incidence of blossom-end rot.
- Taxon
- tomatoes
Solanum lycopersicume1 - Treatment
- reduction of NH 4 + -N, by the supply of N as NO 3 - , and the addition of supplemental Cae2
- Outcome
- incidence of BERe2
- Direction
- reducede2
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“`Equinox' tomatoes ( Lycopersicon esculentum Mill.) were grown during the springs of 2001 and 2002 with black polyethylene-mulch and drip irrigation on an Arredondo fine sand in Gainesville, Fla.”
e2“The reduction of NH 4 + -N, by the supply of N as NO 3 - , and the addition of supplemental Ca reduced the incidence of BER, and increased the leaf and fruit Ca concentrations”
Title
M.D. Taylor; S.J. Locascio; M.R. Alligood HortScience 2004. doi:10.21273/hortsci.39.5.1110
Other claims from this paper (16)
- Intervention effect In 2001, total marketable yields were higher with Ca(NO3)2 or CaCl2 than with Ca thiosulfate.
- Intervention effect In 2001, total marketable yields were higher at 10 kPa irrigation than at 25 kPa.
- Intervention effect Number and weight of blossom-end rot fruit were lower with Ca(NO3)2 and reduced K than with no added Ca and CaSO4.
- Intervention effect Leaf and fruit Ca concentrations were generally higher with Ca(NO3)2 than with all other nutritional treatments.
- Intervention effect The same treatments increased leaf and fruit Ca concentrations.
- Intervention effect In 2002, marketable yields were higher with CaSO4 than with CaCl2 and reduced K.
- Intervention effect Weight and number of blossom-end rot fruit were lower with irrigation at 10 kPa than at 25 kPa.
- Intervention effect Leaf and fruit Ca concentrations were generally higher at 10 kPa irrigation than at 25 kPa.
- Intervention effect In 2002, leaf and fruit Ca concentrations were higher or similar with Ca(NO3)2 than with all other nutritional treatments.
- Association Fruit Ca concentrations were lower in the 2001 season than in the 2002 season.
- Association Blossom-end rot was 5 times higher in the 2001 season than in the 2002 season.
- Mechanism Blossom-end rot is a symptom of calcium deficiency.
- Mechanism Calcium deficiency was aggravated by high rainfall and low evapotranspiration.
- Mechanism Higher transpiration and temperature increased water uptake and hence calcium uptake.
- Observation In both seasons, fruit calcium concentration was lowest at the blossom end and highest at the stem end.
- Observation Interactions between year and treatment were significant.