Abstract
Two field experiments were carried out at the Experimental Farm, Faculty of Agriculture, Minufiya Univ., at Shebin El-kom to study the effect of three irrigation regimes, i.e. 40, 55 and 70 % available soil moisture depletion (ASMD) on growth, seed yield and its components as well as seed quality of four sunflower cultivars namely Pioneer-6480, Euroflor, Elya and Miak during 1996 and 1997 seasons. The treatments were arranged in split-plot design with four replicates where the irrigation treatments occupied the main plots and the tested sunflower cultivars were assigned in the sub-plots. The most important results are summarized as follows: 1-Sunflower plants grown under water stress (40% ASMD) showed significantly higher in plant height, number of green leaves/plant, stem diameter, leaf area/plant, total dry matter/plant, LAI and SLA at all sampling dates which were 45, 60 and 75 days after sowing, and RGR, NAR and CGR values at the period of 45-60 days. On the contrary, exposed plants to 40% ASMD led to significantly lower in RGR, NAR and CGR values at the period of 60-75 days compared to 55% and 70% ASMD treatments in both seasons. Also, sunflower plants exposed to water stress at 40% ASMD gave the highest mean values for seed yield/plot and its components and seed oil percentage in both seasons. A gradual depression in seed yield/plot and its component mean values, parallel to the decrease in amount of available water in the soil was detected. Iodine value and Lenoleic and Lenolenic acids were increased gradually when plants exposed to water stress at 55% and 70% ASMD meanwhile, saturated fatty acids and Oleic acid decreased with increasing the available soil moisture depletion. Acid value and Refractive index in the analysis of crude sunflower oil were not governed by irrigation regimes in both seasons. 2-Miak cultivar surpassed significantly Elya, Euroflor and Pioneer-6480 cultivars in the vegetative growth and LAI at all sampling dates, and SLA at 60 and 75 days after sowing in both seasons whereas, Elya cultivar exceeded significantly the other three ones in SLA at 45 and 60 days after sowing. Moreover, Elya and Maik cultivars surpassed significantly Euroflor and Pioneer-6480 cultivars in RGR at the period of 60-75, and NAR and CGR at the period of 45-60 days after sowing in both seasons. Miak surpassed significantly the other tested cultivars in seed yield/plot and its components and seed oil percentage in both seasons. Miak and Elya cultivars exceeded significantly Euroflor and Pioneer-6480 in Iodine value whereas, Pioneer-6480 expressed the highest mean values of saturated fatty acids and oleic acid than the other three ones. Miak cultivar surpassed significantly the other tested cultivars in Lenoleic and Lenolenic acids. All tested cultivars did not differ significantly with regard to acid value and refractive index in the analysis of crude sunflower oil in both seasons. 3-Partitioning irrigation sum of squares by means of orthogonal polynomials revealed that linear components caused the majority of varietal response to irrigation regimes in seed yield/plot. Also, the linear slope was positive for all the studied cultivars, indicating that using 40% ASMD increased mean values of seed yield/plot. Appreciable quadratic effect of negative sign was detected in all cultivars except Elya cultivar. Cubic effect, meanwhile, was of negligible in all cases. Therefore, it could be safely concluded that irrigation sunflower cultivars at 40% ASMD would be fruitful in all cultivars except Elya cultivar where water stress may be tolerated. 4-Studies on the relative depression in mean values of number of seeds/head, 1000-seed weight and seed yield/plot resulted from water stress revealed that Elya and Miak cultivars were more tolerant to drought conditions than both of Euroflor and Pioneer-6480 cultivars. 5-Correlation studies revealed that seed yield/plot in sunflower was significantly and positively associated with number of seeds/head, 1000-seed weight when sunflower cultivars received the normal irrigation regime (40% ASMD). At the higher levels of available soil moisture depletion (70% ASMD), however, insignificant association and negatively was detected between seed yield/plot and each of number of seeds/head and seeds weight/head. On the other hand, 1000-seed weight appeared to be significantly and positively correlated with seed yield/plot at all the studied irrigation regimes.
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Claims 20
Claim · model-written summary
Sunflower grown at 40% ASMD had significantly higher plant height, number of green leaves per plant and stem diameter at all sampling dates.
- Taxon
- Sunflower
Helianthus annuuse0 - Treatment
- water stress (40% ASMD)e0
- Outcome
- plant height, number of green leaves/plant, stem diametere0
- Direction
- highere0
- Qualifier
- at all sampling dates which were 45, 60 and 75 days after sowinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Sunflower plants grown under water stress (40% ASMD) showed significantly higher in plant height, number of green leaves/plant, stem diameter, leaf area/plant, total dry matter/plant, LAI and SLA at all sampling dates which were 45, 60 and 75 days after sowing, and RGR, NAR and CGR values at the period of 45-60 days”
Claim · model-written summary
Sunflower grown at 40% ASMD had significantly higher leaf area per plant, total dry matter per plant and LAI at all sampling dates.
- Taxon
- SunflowerHelianthus annuuse0
- Treatment
- water stress (40% ASMD)e0
- Outcome
- leaf area/plant, total dry matter/plant, LAIe0
- Direction
- highere0
- Qualifier
- at all sampling dates which were 45, 60 and 75 days after sowinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Sunflower plants grown under water stress (40% ASMD) showed significantly higher in plant height, number of green leaves/plant, stem diameter, leaf area/plant, total dry matter/plant, LAI and SLA at all sampling dates which were 45, 60 and 75 days after sowing, and RGR, NAR and CGR values at the period of 45-60 days”
Claim · model-written summary
Sunflower grown at 40% ASMD had significantly higher SLA at all sampling dates and higher RGR, NAR and CGR at 45-60 days.
- Taxon
- SunflowerHelianthus annuuse0
- Treatment
- water stress (40% ASMD)e0
- Outcome
- SLA at all sampling datese0
- Direction
- highere0
- Qualifier
- RGR, NAR and CGR values at the period of 45-60 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Sunflower plants grown under water stress (40% ASMD) showed significantly higher in plant height, number of green leaves/plant, stem diameter, leaf area/plant, total dry matter/plant, LAI and SLA at all sampling dates which were 45, 60 and 75 days after sowing, and RGR, NAR and CGR values at the period of 45-60 days”
Claim · model-written summary
Plants at 40% ASMD had significantly lower RGR, NAR and CGR at 60-75 days than at 55% and 70% ASMD in both seasons.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 40% ASMDe0
- Outcome
- RGR, NAR and CGR valuese0
- Direction
- lowere0
- Qualifier
- period of 60-75 dayse0
- Comparator
- 55% and 70% ASMD treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“exposed plants to 40% ASMD led to significantly lower in RGR, NAR and CGR values at the period of 60-75 days compared to 55% and 70% ASMD treatments in both seasons”
Claim · model-written summary
Sunflower at 40% ASMD gave the highest seed yield per plot, yield components and seed oil percentage in both seasons.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- water stress at 40% ASMDe0
- Outcome
- seed yield/plot and its components and seed oil percentagee0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“sunflower plants exposed to water stress at 40% ASMD gave the highest mean values for seed yield/plot and its components and seed oil percentage in both seasons”
Claim · model-written summary
Seed yield per plot and its components declined gradually as available soil water decreased.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- decrease in amount of available water in the soile0
- Outcome
- seed yield/plot and its component mean valuese0
- Direction
- depressione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“A gradual depression in seed yield/plot and its component mean values, parallel to the decrease in amount of available water in the soil was detected”
Claim · model-written summary
Iodine value and linoleic and linolenic acids increased gradually when plants were exposed to water stress at 55% and 70% ASMD.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- water stress at 55% and 70% ASMDe0
- Outcome
- Iodine value and Lenoleic and Lenolenic acidse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Iodine value and Lenoleic and Lenolenic acids were increased gradually when plants exposed to water stress at 55% and 70% ASMD”
Claim · model-written summary
Saturated fatty acids and oleic acid decreased with increasing available soil moisture depletion.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- increasing the available soil moisture depletione0
- Outcome
- saturated fatty acids and Oleic acide0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“saturated fatty acids and Oleic acid decreased with increasing the available soil moisture depletion”
Claim · model-written summary
Acid value and refractive index of crude sunflower oil were not governed by irrigation regimes in either season.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- irrigation regimese0
- Outcome
- Acid value and Refractive indexe0
- Direction
- not governede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Acid value and Refractive index in the analysis of crude sunflower oil were not governed by irrigation regimes in both seasons”
Claim · model-written summary
Miak surpassed Elya, Euroflor and Pioneer-6480 significantly in vegetative growth and LAI at all sampling dates.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Miake0
- Outcome
- vegetative growth and LAIe0
- Direction
- surpassede0
- Comparator
- Elya, Euroflor and Pioneer-6480 cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Miak cultivar surpassed significantly Elya, Euroflor and Pioneer-6480 cultivars in the vegetative growth and LAI at all sampling dates”
Claim · model-written summary
Elya significantly exceeded the other three cultivars in SLA at 45 and 60 days after sowing.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Elyae0
- Outcome
- SLAe0
- Direction
- exceedede0
- Comparator
- the other three onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Elya cultivar exceeded significantly the other three ones in SLA at 45 and 60 days after sowing”
Claim · model-written summary
Elya and Maik significantly surpassed Euroflor and Pioneer-6480 in RGR at 60-75 days and in NAR and CGR at 45-60 days.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Elya and Maik cultivarse0
- Outcome
- RGRe0
- Direction
- surpassede0
- Qualifier
- NAR and CGR at the period of 45-60 dayse0
- Comparator
- Euroflor and Pioneer-6480 cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Elya and Maik cultivars surpassed significantly Euroflor and Pioneer-6480 cultivars in RGR at the period of 60-75, and NAR and CGR at the period of 45-60 days after sowing”
Claim · model-written summary
Miak significantly surpassed the other tested cultivars in seed yield per plot, its components and seed oil percentage in both seasons.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Miake0
- Outcome
- seed yield/plot and its components and seed oil percentagee0
- Direction
- surpassede0
- Comparator
- the other tested cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Miak surpassed significantly the other tested cultivars in seed yield/plot and its components and seed oil percentage in both seasons”
Claim · model-written summary
Miak and Elya significantly exceeded Euroflor and Pioneer-6480 in iodine value.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Miak and Elya cultivarse0
- Outcome
- Iodine valuee0
- Direction
- exceedede0
- Comparator
- Euroflor and Pioneer-6480e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Miak and Elya cultivars exceeded significantly Euroflor and Pioneer-6480 in Iodine value”
Claim · model-written summary
Pioneer-6480 had the highest mean values of saturated fatty acids and oleic acid among the cultivars.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Pioneer-6480e0
- Outcome
- saturated fatty acids and oleic acide0
- Direction
- higheste0
- Comparator
- the other three onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Pioneer-6480 expressed the highest mean values of saturated fatty acids and oleic acid than the other three ones”
Claim · model-written summary
Miak significantly surpassed the other tested cultivars in linoleic and linolenic acids.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Miake0
- Outcome
- Lenoleic and Lenolenic acidse0
- Direction
- surpassede0
- Comparator
- the other tested cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Miak cultivar surpassed significantly the other tested cultivars in Lenoleic and Lenolenic acids”
Claim · model-written summary
The four cultivars did not differ significantly in acid value and refractive index of crude sunflower oil in either season.
- Taxon
- sunflowerHelianthus annuuse0
- Material
- All tested cultivarse0
- Outcome
- acid value and refractive indexe0
- Direction
- did not differe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“All tested cultivars did not differ significantly with regard to acid value and refractive index in the analysis of crude sunflower oil in both seasons”
Claim · model-written summary
Irrigating sunflower cultivars at 40% ASMD would be fruitful for all cultivars except Elya, where water stress may be tolerated.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- irrigation sunflower cultivars at 40% ASMDe0
- Outcome
- fruitfule0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“it could be safely concluded that irrigation sunflower cultivars at 40% ASMD would be fruitful in all cultivars except Elya cultivar where water stress may be tolerated”
Claim · model-written summary
Elya and Miak were more tolerant to drought conditions than Euroflor and Pioneer-6480 based on relative depression of seeds per head, 1000-seed weight and seed yield per plot.
- Taxon
- sunflowerHelianthus annuust0
- Material
- Elya and Miak cultivarse0
- Outcome
- tolerant to drought conditionse0
- Direction
- more tolerante0
- Comparator
- Euroflor and Pioneer-6480 cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“Elya and Miak cultivars were more tolerant to drought conditions than both of Euroflor and Pioneer-6480 cultivars”
Claim · model-written summary
Seed yield per plot was significantly and positively associated with seeds per head and 1000-seed weight under the 40% ASMD regime.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- normal irrigation regime (40% ASMD)e0
- Outcome
- seed yield/plote0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“SUNFLOWER CULTIVARS”
e0“seed yield/plot in sunflower was significantly and positively associated with number of seeds/head, 1000-seed weight when sunflower cultivars received the normal irrigation regime (40% ASMD)”
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See all 5 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.