Abstract
Abstract A field study was conducted on a Hubbard loamy sand low in exchangeable Ca to determine the influence of gypsum on cauliflower (Brassica oleracea Botrytis cv. ‘Snow Crown') nutrition, yield, and quality. Four rates of gypsum (0, 560, 1120, and 2240 kg/ha) were incorporated before planting. Extractable soil Ca and S increased linearly with increasing gypsum rate. Despite increases in tissue Ca with gypsum application, tipburn of immature leaves was apparent in all treatments. Gypsum had no effect on final yield, curd size, or tipburn severity. Relative levels of Ca, K, P, and Mg were determined in frozen‐hydrated and freeze‐dried leaf tissue from tipburned and non‐tipburned leaves using a scanning electron microscope with x‐ray microanalysis. Distribution of these elements was also determined in digested leaf tissue using an ICP spectrometer. Results of x‐ray microanalysis indicated that Ca was relatively low and K and P relatively high near necrotic tip areas. No consistent differences in Ca, K, and P distribution were apparent in non‐tipburned leaves. Magnesium appeared to be unrelated to the tipburn disorder. Distribution of leaf Ca was qualitatively similar when ICP and x‐ray microanalysis techniques were compared. Although Ca nutrition may be involved in tipburn, soil applied gypsum as a Ca source did not alleviate the symptoms. Key words: Brassica spp.calciumcauliflowergypsumtipburnx‐ray microanalysis
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Claims 8
Claim · model-written summary
Extractable soil Ca and S increased linearly with increasing gypsum rate in a field study on cauliflower.
- Taxon
- cauliflower
Brassica oleracea var. botrytise0 - Treatment
- gypsume1
- Outcome
- Extractable soil Ca and Se1
- Direction
- increasede1
- Qualifier
- linearly with increasing gypsum ratee1
- Setting
- field studye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted on a Hubbard loamy sand low in exchangeable Ca to determine the influence of gypsum on cauliflower”
e1“Extractable soil Ca and S increased linearly with increasing gypsum rate”
Claim · model-written summary
Tissue Ca in cauliflower increased with gypsum application.
- Taxon
- cauliflowerBrassica oleracea var. botrytise0
- Treatment
- gypsum applicatione2
- Outcome
- tissue Cae2
- Direction
- increasese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted on a Hubbard loamy sand low in exchangeable Ca to determine the influence of gypsum on cauliflower”
e2“Despite increases in tissue Ca with gypsum application”
Claim · model-written summary
Tipburn of immature cauliflower leaves was apparent in all gypsum treatments.
- Taxon
- cauliflowerBrassica oleracea var. botrytise0
- Organ / stage
- immature leavese3
- Outcome
- tipburn of immature leavese3
- Qualifier
- in all treatmentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted on a Hubbard loamy sand low in exchangeable Ca to determine the influence of gypsum on cauliflower”
e3“tipburn of immature leaves was apparent in all treatments”
Claim · model-written summary
Gypsum had no effect on cauliflower final yield, curd size, or tipburn severity.
- Taxon
- cauliflowerBrassica oleracea var. botrytise0
- Treatment
- gypsume4
- Outcome
- final yield, curd size, or tipburn severitye4
- Direction
- no effecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted on a Hubbard loamy sand low in exchangeable Ca to determine the influence of gypsum on cauliflower”
e4“Gypsum had no effect on final yield, curd size, or tipburn severity”
Claim · model-written summary
In tipburned leaves, Ca was relatively low near necrotic tip areas.
- Taxon
- cauliflowerBrassica oleracea var. botrytise0
- Organ / stage
- necrotic tip arease5
- Outcome
- Cae5
- Direction
- relatively lowe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted on a Hubbard loamy sand low in exchangeable Ca to determine the influence of gypsum on cauliflower”
e5“indicated that Ca was relatively low and K and P relatively high near necrotic tip areas”
Claim · model-written summary
In tipburned leaves, K and P were relatively high near necrotic tip areas.
- Taxon
- cauliflowerBrassica oleracea var. botrytise0
- Organ / stage
- necrotic tip arease5
- Outcome
- K and Pe5
- Direction
- relatively highe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted on a Hubbard loamy sand low in exchangeable Ca to determine the influence of gypsum on cauliflower”
e5“indicated that Ca was relatively low and K and P relatively high near necrotic tip areas”
Claim · model-written summary
No consistent differences in Ca, K, and P distribution were apparent in non-tipburned cauliflower leaves.
- Taxon
- cauliflowerBrassica oleracea var. botrytise0
- Organ / stage
- non-tipburned leavese6
- Outcome
- Ca, K, and P distributione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted on a Hubbard loamy sand low in exchangeable Ca to determine the influence of gypsum on cauliflower”
e6“No consistent differences in Ca, K, and P distribution were apparent in non-tipburned leaves”
Claim · model-written summary
Leaf Ca distribution measured by x-ray microanalysis was qualitatively similar to that measured by ICP spectrometry.
- Taxon
- cauliflowerBrassica oleracea var. botrytise0
- Outcome
- Distribution of leaf Cae1
- Direction
- qualitatively similare1
- Comparator
- ICPe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A field study was conducted on a Hubbard loamy sand low in exchangeable Ca to determine the influence of gypsum on cauliflower”
e1“Distribution of leaf Ca was qualitatively similar when ICP and”
The same questions in other papers
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3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
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2 papers more in this group
See all 6 papers →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.