Abstract
Limited information is available on water and nitrogen (N) management of sugarcane (Saccharum officinarum L.) in Khuzestan, southwestern Iran, where this crop is currently and extensively grown under heavy irrigation and N fertilization. Therefore, a field experiment was conducted from September 2000 to March 2002 at the Research Department of Karoon Agro-industry in Khuzestan to determine the effect of four irrigation [irrigation water/cumulative pan evaporation (IW/CPE) ratios of 0.6, 0.8, 1.0, and 1.2)] and four N (0, 86, 172, and 258 kg N ha-1) levels on sugarcane yield and water and N use efficiencies. The experiment was carried out as split-plot arranged in a randomized complete blocks design with four replications. Pan evaporation data was recorded daily using class A open pan. Increased water and N application increased both plant cane crop and sugar yields. The highest sugar yield was obtained under IW/CPE = 1.2 (29 irrigations) and with 172 kg N ha-1 with no significant difference with IW/CPE = 1.0 (25 irrigations) and 86 kg N ha-1, respectively. Higher irrigation and N levels showed a small but not significant reduction in both juice sucrose and purity percentages. Higher N levels significantly increased the N use efficiency (NUE) for cane yield, but NUE for sugar yield was highest at 86 kg N ha-1. Water use efficiency (WUE) increased with higher water application. Thus pan evaporation data and N management can effectively meet both irrigation (IW/CPE = 1.0) and N requirements (86.0 kg ha-1) of sugarcane without any adverse effect on yields and environment and reduces production costs as well.
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Claims 14
Claim · model-written summary
Increasing water application increased plant cane crop yield.
Not reportedComparator
Verbatim
e0“Increased water and N application increased both plant cane crop and sugar yields”
t0“Sugarcane”
Claim · model-written summary
Increasing nitrogen application increased plant cane crop yield.
Not reportedComparator
Verbatim
e0“Increased water and N application increased both plant cane crop and sugar yields”
t0“Sugarcane”
Claim · model-written summary
Increasing water application increased sugar yield.
Not reportedComparator
Verbatim
e0“Increased water and N application increased both plant cane crop and sugar yields”
t0“Sugarcane”
Claim · model-written summary
Increasing nitrogen application increased sugar yield.
Not reportedComparator
Verbatim
e0“Increased water and N application increased both plant cane crop and sugar yields”
t0“Sugarcane”
Claim · model-written summary
Sugar yield was highest under IW/CPE 1.2, without significant difference from 1.0.
Verbatim
e0“The highest sugar yield was obtained under IW/CPE = 1.2 (29 irrigations) and with 172 kg N ha-1 with no significant difference with IW/CPE = 1.0 (25 irrigations) and 86 kg N ha-1, respectively”
t0“Sugarcane”
Claim · model-written summary
Sugar yield was highest at 172 kg N ha-1, without significant difference from 86 kg N ha-1.
Verbatim
e0“The highest sugar yield was obtained under IW/CPE = 1.2 (29 irrigations) and with 172 kg N ha-1 with no significant difference with IW/CPE = 1.0 (25 irrigations) and 86 kg N ha-1, respectively”
t0“Sugarcane”
Claim · model-written summary
Higher irrigation caused a small nonsignificant reduction in juice sucrose percentage.
Not reportedComparator
Verbatim
e0“Higher irrigation and N levels showed a small but not significant reduction in both juice sucrose and purity percentages”
t0“Sugarcane”
Claim · model-written summary
Higher nitrogen caused a small nonsignificant reduction in juice sucrose percentage.
Not reportedComparator
Verbatim
e0“Higher irrigation and N levels showed a small but not significant reduction in both juice sucrose and purity percentages”
t0“Sugarcane”
Claim · model-written summary
Higher irrigation caused a small nonsignificant reduction in juice purity percentage.
Not reportedComparator
Verbatim
e0“Higher irrigation and N levels showed a small but not significant reduction in both juice sucrose and purity percentages”
t0“Sugarcane”
Claim · model-written summary
Higher nitrogen caused a small nonsignificant reduction in juice purity percentage.
Not reportedComparator
Verbatim
e0“Higher irrigation and N levels showed a small but not significant reduction in both juice sucrose and purity percentages”
t0“Sugarcane”
Claim · model-written summary
Higher nitrogen significantly increased nitrogen use efficiency for cane yield.
- Taxon
- Sugarcanet0
- Treatment
- Higher N levelse0
- Outcome
- N use efficiency (NUE) for cane yielde0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Higher N levels significantly increased the N use efficiency (NUE) for cane yield”
t0“Sugarcane”
Claim · model-written summary
Nitrogen use efficiency for sugar yield peaked at 86 kg N ha-1.
Not reportedComparator
Verbatim
e0“NUE for sugar yield was highest at 86 kg N ha-1”
t0“Sugarcane”
Claim · model-written summary
Water use efficiency increased with higher water application.
- Taxon
- Sugarcanet0
- Treatment
- higher water applicatione0
- Outcome
- Water use efficiency (WUE)e0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Water use efficiency (WUE) increased with higher water application”
t0“Sugarcane”
Claim · model-written summary
The authors recommend IW/CPE 1.0 and 86.0 kg ha-1 nitrogen to meet sugarcane needs without yield or environmental harm and with lower production costs.
Verbatim
e0“pan evaporation data and N management can effectively meet both irrigation (IW/CPE = 1.0) and N requirements (86.0 kg ha-1) of sugarcane without any adverse effect on yields and environment and reduces production costs as well”
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See all 41 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.