Abstract
The effects of the duration, timing and chemical amelioration of short-term waterlogging during furrow irrigation of cotton in a cracking grey clay soil were investigated at Narrabri, N.S.W. Water was run in furrows for 4, 8, 16, 32 and 64 h at each of the three crop irrigations. In other treatments, watering was extended from 4 to 16 h either at the first, second or third irrigation, to establish at which irrigation waterlogging had the most effect. Soil applications of hydrogen peroxide and foliar sprays of urea were evaluated as chemical ameliorants of short-term waterlogging. Increasing the period of inundation from 4 to 32 h reduced green bolls m-2 by 17.5 %, open bolls m-2 by 20.6 % and final lint yield by 300 kg ha-1 or 18.3 %. No further decreases were observed by increasing the period of inundation to 64 h. Extended waterlogging was equally damaging at each of the three irrigations. The rate of recovery from waterlogging to an air-filled porosity of 0.10 cm3 cm-3 in the top 20 cm of soil was highly correlated with lint yield, and was consistent with results from a previous season. Soil applications of hydrogen peroxide did not ameliorate waterlogging damage, whereas significantly higher lint yields were obtained from foliar sprays of urea applied prior to each irrigation. The results confirmed that cotton should be irrigated and thereafter drained rapidly in this soil to minimize loss of yield. This could be achieved by increasing the rate of application of irrigation water and by using shorter fields and steeper slopes. The use of chemical ameliorants requires further investigation.
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Claims 9
Claim · model-written summary
Inundation from 4 to 32 h reduced green bolls by 17.5%.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- 32 he0
- Outcome
- green bolls m-2e0
- Direction
- reducede0
- Value
- 17.5 %e0
- Comparator
- 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the period of inundation from 4 to 32 h reduced green bolls m-2 by 17.5 %”
t0“cotton”
Claim · model-written summary
Inundation from 4 to 32 h reduced open bolls by 20.6%.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 32 he0
- Outcome
- open bolls m-2e0
- Direction
- reducede0
- Value
- 20.6 %e0
- Comparator
- 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the period of inundation from 4 to 32 h reduced green bolls m-2 by 17.5 %, open bolls m-2 by 20.6 %”
t0“cotton”
Claim · model-written summary
Inundation from 4 to 32 h reduced lint yield by 300 kg ha-1 or 18.3%.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 32 he0
- Outcome
- final lint yielde0
- Direction
- reducede0
- Value
- 300 kg ha-1 or 18.3 %e0
- Comparator
- 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the period of inundation from 4 to 32 h reduced green bolls m-2 by 17.5 %, open bolls m-2 by 20.6 % and final lint yield by 300 kg ha-1 or 18.3 %”
t0“cotton”
Claim · model-written summary
Inundation extended to 64 h caused no further decreases.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- increasing the period of inundation to 64 he0
- Outcome
- further decreasese0
- Direction
- No further decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No further decreases were observed by increasing the period of inundation to 64 h.”
t0“cotton”
Claim · model-written summary
Extended waterlogging damaged cotton equally at all three irrigations.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Extended waterlogginge0
- Outcome
- equally damaginge0
- Qualifier
- each of the three irrigationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extended waterlogging was equally damaging at each of the three irrigations.”
t0“cotton”
Claim · model-written summary
Recovery of soil air-filled porosity was highly correlated with lint yield.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- lint yielde0
- Direction
- highly correlatede0
- Qualifier
- air-filled porosity of 0.10 cm3 cm-3 in the top 20 cm of soile0
- Setting
- soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of recovery from waterlogging to an air-filled porosity of 0.10 cm3 cm-3 in the top 20 cm of soil was highly correlated with lint yield”
t0“cotton”
Claim · model-written summary
Soil hydrogen peroxide did not ameliorate waterlogging damage.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Soil applications of hydrogen peroxidee0
- Outcome
- waterlogging damagee0
- Direction
- did not amelioratee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil applications of hydrogen peroxide did not ameliorate waterlogging damage”
t0“cotton”
Claim · model-written summary
Foliar urea before each irrigation significantly raised lint yields.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- foliar sprays of urea applied prior to each irrigatione0
- Outcome
- lint yieldse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly higher lint yields were obtained from foliar sprays of urea applied prior to each irrigation”
t0“cotton”
Claim · model-written summary
Cotton should be irrigated and drained rapidly in this soil to minimize yield loss.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- irrigated and thereafter drained rapidlye0
- Outcome
- minimize loss of yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton should be irrigated and thereafter drained rapidly in this soil to minimize loss of yield”
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