Abstract
Field experiments were conducted during two successive seasons in the Agricultural Research Center, Giza, Egypt (a clay loam soil), to study the effects of phosphorus fertilization (addition at rates of 44 and 74kg of P 2 O 5 /ha) and foliar application of zinc (at 0·0 and 40ppm of Zn applied twice, 75 and 90 days after planting) and calcium (at 0·0, 20, 40, and 60ppm of Ca applied twice, 80 and 95 days after planting) on seed, protein and oil yields and oil properties of the Egyptian cotton cultivar Giza 75. Application of P at the high rate and spraying plants with zinc and calcium at any concentration increased cottonseed yield/ha, seed index, seed oil content, oil and protein yields/ha, seed oil unsaponifiable matter, and total unsaturated fatty acids (oleic and linoleic). Conversely, decreases in oil acid value, saponification value and total saturated fatty acids occurred. The seed protein and oil refractive index tended to increase when the high P rate and Zn were applied. Seed protein content tended to decrease slightly with Ca application. Regardless of the slight decrease in protein content as a result of Ca application, the yield of protein increased, due to the fact that there was an obvious increase in seed yield which counterbalanced the negative effect of the decrease in protein content. The highest Ca concentration (60ppm) gave the highest values of cottonseed yield/ha, seed index, seed oil and protein yields/ha and oil unsaponifiable matter, followed by the concentration of 40ppm. The concentration of 40ppm gave the lowest total saturated fatty acids. The effect of Ca concentrations on oil refractive index was very limited.
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Claims 8
Claim · model-written summary
High phosphorus, zinc, and calcium increased cottonseed yield, seed index, oil content, oil and protein yields, unsaponifiable matter, and unsaturated fatty acids.
- Taxon
- cotton
Gossypium hirsutume0 - Material
- Giza 75t1
- Treatment
- Application of P at the high rate and spraying plants with zinc and calcium at any concentratione0
- Outcome
- cottonseed yield/ha, seed index, seed oil contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of P at the high rate and spraying plants with zinc and calcium at any concentration increased cottonseed yield/ha, seed index, seed oil content, oil and protein yields/ha, seed oil unsaponifiable matter, and total unsaturated fatty acids (oleic and linoleic)”
t0“cotton”
t1“Giza 75”
Claim · model-written summary
The fertilizer applications decreased oil acid value, saponification value, and saturated fatty acids.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- phosphorus fertilization and foliar application of chelated zinc and calciumt1
- Outcome
- oil acid value, saponification value and total saturated fatty acidse0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conversely, decreases in oil acid value, saponification value and total saturated fatty acids occurred”
t0“cotton”
t1“phosphorus fertilization and foliar application of chelated zinc and calcium”
Claim · model-written summary
High phosphorus and zinc tended to increase seed protein and oil refractive index.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- high P rate and Zne0
- Outcome
- seed protein and oil refractive indexe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed protein and oil refractive index tended to increase when the high P rate and Zn were applied”
t0“cotton”
Claim · model-written summary
Calcium tended to slightly decrease seed protein content.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Ca applicatione0
- Outcome
- Seed protein contente0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed protein content tended to decrease slightly with Ca application”
t0“cotton”
Claim · model-written summary
Calcium increased protein yield owing to increased seed yield.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- seede0
- Outcome
- yield of protein increasede0
- Qualifier
- increase in seed yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield of protein increased, due to the fact that there was an obvious increase in seed yield which counterbalanced the negative effect of the decrease in protein content”
t0“cotton”
Claim · model-written summary
The highest calcium concentration gave the highest seed yield, seed index, oil and protein yields, and unsaponifiable matter.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Ca concentration (60ppm)e0
- Outcome
- cottonseed yield/ha, seed index, seed oil and protein yields/hae0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest Ca concentration (60ppm) gave the highest values of cottonseed yield/ha, seed index, seed oil and protein yields/ha and oil unsaponifiable matter”
Claim · model-written summary
Calcium at 40 ppm gave the lowest saturated fatty acids.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- concentration of 40ppme0
- Outcome
- total saturated fatty acidse0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of 40ppm gave the lowest total saturated fatty acids”
t0“cotton”
Claim · model-written summary
Calcium concentration had a very limited effect on oil refractive index.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Ca concentrationse0
- Outcome
- oil refractive indexe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of Ca concentrations on oil refractive index was very limited”
t0“cotton”
The same questions in other papers
zinc atom · quality: protein · Gossypium hirsutum (cotton)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →zinc atom · quality: oil · Gossypium hirsutum (cotton)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
application · quality: oil · Gossypium hirsutum (cotton)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
phosphorus · quality: protein · Gossypium hirsutum (cotton)Results agree
2 papers in the same direction as this paper
- positive
- positive
phosphorus · quality: oil · Gossypium hirsutum (cotton)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.