Abstract
This study aimed to evaluate the nitrogen use efficiency by different cotton varieties in an Acrisol. The design was com- pletely randomized in a 5x2x5 factorial. The factors consisted of five nitrogen rates (0, 250, 500, 750 and 1000 mg dm-3 of soil), two cotton genotypes (FiberMax 910 and FiberMax 966) and five repetitions, using urea as source N (45% N). The following variables were studied: dry matter production of plant shoots, nitrogen content, nitrogen concentration, N use efficiency, efficiency of nitrogen applied, physiological efficiency, agro-physiologic efficiency and recovery efficiency. The results showed that there was a significant linear effect of nitrogen application in the dry matter production, nitrogen content and nitrogen concentration of cotton plant. The nitrogen use efficiency varied with the genotypes and type of ef- ficiency calculated, and with increasing doses of N, less N was recovered by cotton plants.
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Claims 5
Claim · model-written summary
Nitrogen application had a significant linear effect on cotton shoot dry matter production.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- nitrogen applicatione0
- Outcome
- dry matter productione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a significant linear effect of nitrogen application in the dry matter production, nitrogen content and nitrogen concentration of cotton plant”
Claim · model-written summary
Nitrogen application had a significant linear effect on cotton nitrogen content.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- nitrogen applicatione0
- Outcome
- nitrogen contente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a significant linear effect of nitrogen application in the dry matter production, nitrogen content and nitrogen concentration of cotton plant”
Claim · model-written summary
Nitrogen application had a significant linear effect on cotton nitrogen concentration.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- nitrogen applicatione0
- Outcome
- nitrogen concentratione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a significant linear effect of nitrogen application in the dry matter production, nitrogen content and nitrogen concentration of cotton plant”
Claim · model-written summary
Nitrogen use efficiency varied by cotton genotype and efficiency measure.
- Taxon
- cottonGossypium hirsutumt0
- Material
- genotypese0
- Outcome
- nitrogen use efficiencye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogen use efficiency varied with the genotypes and type of ef- ficiency calculated”
t0“cotton”
Claim · model-written summary
Higher nitrogen doses reduced nitrogen recovery by cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- increasing doses of Ne0
- Outcome
- N was recoverede0
- Direction
- lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with increasing doses of N, less N was recovered by cotton plants”