Abstract
Core Ideas A low to moderate N rate is a best management practice after cessation of pelletized poultry litter. This best management practice optimized leaf area, N removal, and lint yield, while reducing input costs. This best management practice reduced soil nitrate levels in the top 30 cm after harvest by approximately 61%. Nitrogen carryover from pelletized poultry litter (PPL) can partially meet cotton ( Gossypium hirsutum L.) N demands. A 3‐yr study determined yield effects of 6.7 Mg ha −1 PPL applied in 2010 to 2013 on cotton leaf area, nitrogen use efficiency (NUE) and yield. Treatments in 2014 and 2015 were no N (control), residual PPL, residual PPL with 84 kg ha −1 N (urea ammonium nitrate) at squaring, and 56 and 84 kg ha −1 N at planting and squaring, respectively. Treatments in 2016 were control, residual PPL with 56 kg ha −1 N, residual PPL with 56 kg ha −1 N at planting and squaring, and split application of 112 kg ha −1 N. Applying 84 kg ha −1 N to residual PPL plots increased ( P < 0.05) leaf area index during the boll‐filling period. Across years, N removal did not differ between residual PPL with 84 kg N ha −1 and fertilizer N only (112 vs. 116 kg N ha −1 ), but was considerably less with residual PPL (40 kg N ha −1 ). Lint yield was greater ( P < 0.01) in PPL with fertilizer N than fertilizer N only by 10% in 2014 (1795 vs. 1633 kg ha −1 ), 5% in 2015 (1898 vs. 1809 kg ha −1 ), and 20% in 2016 (1860 vs. 1554 kg ha −1 ), suggesting residual PPL enhanced NUE. Following cessation of PPL, side‐dress N applications of 56 or 84 kg ha −1 appeared to meet cotton N requirement and enable optimization of fertilizer use.
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Claims 9
Claim · model-written summary
A low to moderate nitrogen rate after litter cessation optimized leaf area, nitrogen removal and lint yield.
- Taxon
- Cotton
Gossypium hirsutumt0 - Treatment
- low to moderate N ratee0
- Outcome
- leaf area, N removal, and lint yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A low to moderate N rate is a best management practice after cessation of pelletized poultry litter. This best management practice optimized leaf area, N removal, and lint yield”
t0“Cotton”
Claim · model-written summary
The management practice reduced postharvest nitrate in the top 30 cm by about 61%.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- best management practicee0
- Outcome
- soil nitrate levelse0
- Direction
- reducede0
- Value
- approximately 61%e0
- Qualifier
- top 30 cm after harveste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This best management practice reduced soil nitrate levels in the top 30 cm after harvest by approximately 61%”
t0“Cotton”
Claim · model-written summary
Adding 84 kg ha−1 nitrogen to residual litter increased cotton leaf area index during boll filling.
- Taxon
- CottonGossypium hirsutumt0
- Organ / stage
- boll‐filling periode0
- Treatment
- 84 kg ha −1 N to residual PPL plotse0
- Outcome
- leaf area indexe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying 84 kg ha −1 N to residual PPL plots increased ( P < 0.05) leaf area index during the boll‐filling period”
t0“Cotton”
Claim · model-written summary
Nitrogen removal did not differ between residual litter plus 84 kg N ha−1 and fertilizer-only treatments.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- residual PPL with 84 kg N ha −1e0
- Outcome
- N removale0
- Direction
- did not differe0
- Qualifier
- 112 vs. 116 kg N ha −1e0
- Comparator
- fertilizer N onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N removal did not differ between residual PPL with 84 kg N ha −1 and fertilizer N only (112 vs. 116 kg N ha −1 )”
t0“Cotton”
Claim · model-written summary
Nitrogen removal was much lower under residual litter alone.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- residual PPLe0
- Outcome
- N removale0
- Direction
- considerably lesse0
- Value
- 40 kg N ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N removal did not differ between residual PPL with 84 kg N ha −1 and fertilizer N only (112 vs. 116 kg N ha −1 ), but was considerably less with residual PPL (40 kg N ha −1 )”
t0“Cotton”
Claim · model-written summary
In 2014, litter plus fertilizer raised lint yield 10% over fertilizer alone.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- PPL with fertilizer Ne0
- Outcome
- Lint yielde0
- Direction
- greatere0
- Value
- 10%e0
- Qualifier
- 2014 (1795 vs. 1633 kg ha −1 )e0
- Comparator
- fertilizer N onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lint yield was greater ( P < 0.01) in PPL with fertilizer N than fertilizer N only by 10% in 2014 (1795 vs. 1633 kg ha −1 )”
t0“Cotton”
Claim · model-written summary
In 2015, litter plus fertilizer raised lint yield 5% over fertilizer alone.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- PPL with fertilizer Ne0
- Outcome
- Lint yielde0
- Direction
- greatere0
- Value
- 5%e0
- Qualifier
- 2015 (1898 vs. 1809 kg ha −1 )e0
- Comparator
- fertilizer N onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lint yield was greater ( P < 0.01) in PPL with fertilizer N than fertilizer N only by 10% in 2014 (1795 vs. 1633 kg ha −1 ), 5% in 2015 (1898 vs. 1809 kg ha −1 )”
t0“Cotton”
Claim · model-written summary
In 2016, litter plus fertilizer raised lint yield 20% over fertilizer alone.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- PPL with fertilizer Ne0
- Outcome
- Lint yielde0
- Direction
- greatere0
- Value
- 20%e0
- Qualifier
- 2016 (1860 vs. 1554 kg ha −1 )e0
- Comparator
- fertilizer N onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lint yield was greater ( P < 0.01) in PPL with fertilizer N than fertilizer N only by 10% in 2014 (1795 vs. 1633 kg ha −1 ), 5% in 2015 (1898 vs. 1809 kg ha −1 ), and 20% in 2016 (1860 vs. 1554 kg ha −1 )”
t0“Cotton”
Claim · model-written summary
The authors conclude that side dressing 56 or 84 kg ha−1 nitrogen can meet cotton nitrogen requirements after litter cessation.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- side‐dress N applications of 56 or 84 kg ha −1e0
- Outcome
- meet cotton N requirement and enable optimization of fertilizer usee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“side‐dress N applications of 56 or 84 kg ha −1 appeared to meet cotton N requirement and enable optimization of fertilizer use”
The same questions in other papers
cultivation system · nutrient: content · Gossypium hirsutum (cotton)Positive and negative results
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- no effect
- positive
- positive
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See all 7 papers →fertilization · quality: grain · Gossypium hirsutum (cotton)Positive and negative results
81 papers in the same direction as this paper · 46 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- no effect
125 papers more in this group
See all 129 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.