Abstract
Abstract. The present research aimed to investigate the yield of sunflower as affected by N (0, 60, 80 and 100 kg ha-1) P (0, 80, 100 and 120 kg ha-1) K (0, 80, 100 and 120 kg ha-1) fertilization treatments and irrigation regimes (available soil water l= 55, 70, 85 and 100%) on semiarid Brazilian conditions. The experiment was carried out at the Agricultural Engineering Department, Campina Grande, Paraiba State, Brazil, in a semi controlled greenhouse. The treatments were defined according to a Baconian matrix, arranged in a complete randomized design, with three replicates. Plants were measured parameters such as: dry matter of the head, total number of achenes, total achenes weight and 1000 achenes weight. The results of this research indicate that nitrogen had a significant effect on dry matter of the head and total achenes weight. The effect of phosphorus on sunflower yield showed that there were significant differences in all production traits. Potassium did not affect the production traits. The effect of water on sunflower yield showed that there were significant differences in dry matter of the head, total number of achenes and total achenes weight. However, the interaction of water with nitrogen and phosphorus with water influenced significantly only in the total number and weight of achenes, respectively. The 100 kg N ha-1, 120 kg P2O5 ha-1 and 100% of available soil water produced highest production traits. Thus, providing sufficient nitrogen, phosphorus, and soil water application are important to produce higher sunflower yield in semi arid region.
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Claims 10
Claim · model-written summary
Nitrogen significantly affected head dry matter and total achene weight.
Not reportedTaxonComparatorDirection
Verbatim
e0“nitrogen had a significant effect on dry matter of the head and total achenes weight”
Claim · model-written summary
Phosphorus significantly affected all production traits.
- Taxon
- sunflower
Helianthus annuuse0 - Treatment
- phosphoruse0
- Outcome
- all production traitse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phosphorus on sunflower yield showed that there were significant differences in all production traits”
Claim · model-written summary
Potassium did not affect production traits.
Not reportedTaxonComparator
Verbatim
e0“Potassium did not affect the production traits”
Claim · model-written summary
Water treatments significantly differed in head dry matter, achene number and achene weight.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- watere0
- Outcome
- dry matter of the head, total number of achenes and total achenes weighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water on sunflower yield showed that there were significant differences in dry matter of the head, total number of achenes and total achenes weight”
Claim · model-written summary
Water and nitrogen interaction significantly influenced achene number.
Not reportedTaxonDirection
Verbatim
e0“interaction of water with nitrogen and phosphorus with water influenced significantly only in the total number and weight of achenes, respectively”
Claim · model-written summary
Phosphorus and water interaction significantly influenced achene weight.
Not reportedTaxonDirection
Verbatim
e0“interaction of water with nitrogen and phosphorus with water influenced significantly only in the total number and weight of achenes, respectively”
Claim · model-written summary
100 kg N per hectare produced highest production traits.
Not reportedTaxonComparator
Verbatim
e0“The 100 kg N ha-1, 120 kg P2O5 ha-1 and 100% of available soil water produced highest production traits”
Claim · model-written summary
120 kg P2O5 per hectare produced highest production traits.
Not reportedTaxonComparator
Verbatim
e0“The 100 kg N ha-1, 120 kg P2O5 ha-1 and 100% of available soil water produced highest production traits”
Claim · model-written summary
100% available soil water produced highest production traits.
Not reportedTaxonComparator
Verbatim
e0“The 100 kg N ha-1, 120 kg P2O5 ha-1 and 100% of available soil water produced highest production traits”
Claim · model-written summary
The authors recommend sufficient nitrogen, phosphorus and water for higher sunflower yield.
- Taxon
- sunflowerHelianthus annuuse0
- Outcome
- providing sufficient nitrogen, phosphorus, and soil water applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“providing sufficient nitrogen, phosphorus, and soil water application are important to produce higher sunflower yield”
The same questions in other papers
phosphorus · yield · Helianthus annuus (common sunflower)Results differ
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- no effect
- no effect
- positive
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See all 81 papers →soil water · yield · Helianthus annuus (common sunflower)Positive and negative results
6 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
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See all 10 papers →potassium · yield · Helianthus annuus (common sunflower)Positive and negative results
2 papers in the same direction as this paper · 48 in the opposite direction
- positive
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See all 51 papers →nitrogen · yield · Helianthus annuus (common sunflower)Positive and negative results
181 papers in the same direction as this paper · 10 in the opposite direction · 4 reporting no difference from an alternative
- negative
- no effect
- negative
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See all 196 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.