Abstract
The Brazilian Savanna (Cerrado) ecosystem concentrates most of the area under cotton cultivation in the country, and is characterized, predominantly, by low fertility soils. Nitrogen (N) is the most extracted nutrient from the soil by most crops, while sulfur (S) fertilization has been little explored in studies with cotton plants. This study aimed to evaluate the effects of N and S fertilization on the N content of leaf, weight of 30 bolls, productivity, and agronomicefficiency of cotton plants grown in an Oxisol from the Brazilian Cerrado region. Two independent field experiments were carried out simultaneously in a completely randomized block design with four replications. The first experiment was composed of five levels of N (17, 100, 150, 200 and 250 kg ha-1) and the second with five levels of S (24, 50, 75, 100 and 125 kg ha-1). The leaf N content of the cotton plants increased linearly with the supply of up to 250 kg ha-1 ofN in the soil. The weight of 30 bolls and the seed-cotton productivity were considerably increased with the increase of the N and S levels in the soil. The maximum agronomic efficiency of the N and S fertilization was obtained with the application of 150 and 100 kg ha-1 of N and S, respectively. Therefore, this study clearly showed the positive effects of the adequate fertilization of N and S on the productivity of cotton in soils from the Brazilian Cerrado region.
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Claims 7
Claim · model-written summary
Leaf nitrogen rose linearly with nitrogen supply up to 250 kg ha-1.
- Taxon
- cotton plants
Gossypium hirsutume0 - Treatment
- supply of up to 250 kg ha-1 ofNe0
- Outcome
- leaf N contente0
- Direction
- increased linearlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf N content of the cotton plants increased linearly with the supply of up to 250 kg ha-1 ofN in the soil.”
Claim · model-written summary
Boll weight increased with soil nitrogen levels.
- Taxon
- cotton plantsGossypium hirsutumt0
- Treatment
- Ne0
- Outcome
- weight of 30 bollse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weight of 30 bolls and the seed-cotton productivity were considerably increased with the increase of the N and S levels in the soil.”
t0“cotton plants”
Claim · model-written summary
Boll weight increased with soil sulfur levels.
- Taxon
- cotton plantsGossypium hirsutumt0
- Treatment
- Se0
- Outcome
- weight of 30 bollse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weight of 30 bolls and the seed-cotton productivity were considerably increased with the increase of the N and S levels in the soil.”
t0“cotton plants”
Claim · model-written summary
Seed cotton productivity increased with nitrogen levels.
- Taxon
- cotton plantsGossypium hirsutumt0
- Treatment
- Ne0
- Outcome
- seed-cotton productivitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weight of 30 bolls and the seed-cotton productivity were considerably increased with the increase of the N and S levels in the soil.”
t0“cotton plants”
Claim · model-written summary
Seed cotton productivity increased with sulfur levels.
- Taxon
- cotton plantsGossypium hirsutumt0
- Treatment
- Se0
- Outcome
- seed-cotton productivitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weight of 30 bolls and the seed-cotton productivity were considerably increased with the increase of the N and S levels in the soil.”
t0“cotton plants”
Claim · model-written summary
Nitrogen agronomic efficiency peaked at the reported 150 kg ha-1 rate.
- Taxon
- cotton plantsGossypium hirsutumt0
- Treatment
- Ne0
- Outcome
- agronomic efficiency of the Ne0
- Direction
- maximume0
- Value
- 150e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum agronomic efficiency of the N and S fertilization was obtained with the application of 150 and 100 kg ha-1 of N and S, respectively.”
t0“cotton plants”
Claim · model-written summary
Sulfur agronomic efficiency peaked at 100 kg ha-1.
- Taxon
- cotton plantsGossypium hirsutumt0
- Treatment
- Se0
- Outcome
- agronomic efficiency of the N and Se0
- Direction
- maximume0
- Value
- 100 kg ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum agronomic efficiency of the N and S fertilization was obtained with the application of 150 and 100 kg ha-1 of N and S, respectively.”
t0“cotton plants”
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sulfur atom · yield · Gossypium hirsutum (cotton)Results differ
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- no effect
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285 papers in the same direction as this paper · 53 in the opposite direction · 4 reporting no difference from an alternative
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See all 343 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.