Abstract
Individual effects of application of nitrogen (N) and plant densities (PD) were reported in various studies; however an interactive effect of N and PD in cotton was not studied. To explore the benefits of interactive effects of N fertilizer and PD to increase the quality of cotton. This study was carried out in randomized complete block design (RCBD) with split plot arrangement. In split plot arrangement, main plot was consisted of N application rate and in sub plots different PD were done. There were two nitrogen levels; low N level (F1) 120 kg ha−1 and high N level (F2) 180 kg ha−1 and three planting densities; 8 plants m−2 as low density (LD), 10 plants m−2 as medium density (MD) and 12 plants m−2 as high density (HD). In this study we observed the interactive effect of N application levels and PD on cotton photosynthetic and agronomic traits of various stages of development. Results showed that cotton growth and N contents was varied among treatments on different development stages. Plant biomass production, photosynthetic rate (Pn), intercellular CO2 (Ci), water use efficiency (WUE) and N contents were unaffected at the seedling stage by N application rate and PD, however, the highest Pn, Ci and N contents was at squaring stage followed by blooming stage. Higher seed cotton yield and lint yield were obtained F1 with HD, and F2 with MD yielded the highest N contents and cotton yield among treatments. We found that the squaring stage was more critical, followed by the blooming stage when considering N rate and PD.
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Claims 6
Claim · model-written summary
At the seedling stage, cotton plant biomass production, photosynthetic rate and intercellular CO2 were unaffected by nitrogen application rate and plant density.
- Taxon
- cotton
Gossypium hirsutumt0 - Organ / stage
- seedling stagee0
- Treatment
- N application rate and PDe0
- Outcome
- Plant biomass production, photosynthetic rate (Pn), intercellular CO2 (Ci)e0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“Plant biomass production, photosynthetic rate (Pn), intercellular CO2 (Ci), water use efficiency (WUE) and N contents were unaffected at the seedling stage by N application rate and PD”
Claim · model-written summary
At the seedling stage, cotton water use efficiency and N contents were unaffected by nitrogen application rate and plant density.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- seedling stagee0
- Treatment
- N application rate and PDe0
- Outcome
- water use efficiency (WUE) and N contentse0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e0“Plant biomass production, photosynthetic rate (Pn), intercellular CO2 (Ci), water use efficiency (WUE) and N contents were unaffected at the seedling stage by N application rate and PD”
Claim · model-written summary
In cotton the highest photosynthetic rate, intercellular CO2 and N contents occurred at the squaring stage, followed by the blooming stage.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- squaring stagee1
- Outcome
- the highest Pn, Ci and N contentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e1“the highest Pn, Ci and N contents was at squaring stage followed by blooming stage”
Claim · model-written summary
Higher seed cotton yield and lint yield were obtained in cotton under the low N level (F1) combined with high plant density (HD).
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- F1 with HDe2
- Outcome
- seed cotton yield and lint yielde2
- Direction
- Highere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e2“Higher seed cotton yield and lint yield were obtained F1 with HD”
Claim · model-written summary
Cotton under the high N level (F2) with medium plant density (MD) gave the highest N contents and cotton yield among treatments.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- F2 with MDe3
- Outcome
- N contents and cotton yielde3
- Direction
- higheste3
- Comparator
- among treatmentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e3“F2 with MD yielded the highest N contents and cotton yield among treatments”
Claim · model-written summary
The authors conclude that the squaring stage was more critical, followed by the blooming stage, when considering N rate and plant density in cotton.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- the squaring stage was more criticale4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton”
e4“the squaring stage was more critical, followed by the blooming stage when considering N rate and PD”
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