Abstract
In irrigation schemes under rotational water supply in semiarid region, the water allocation and irrigation scheduling are often based on a fixed-area proportionate water depth with every irrigation cycle irrespective of crops and their growth stages, for an equitable water supply. An experiment was conducted during the 2004- 2005 season in Haouz irrigated area in Morocco, which objective was i) to evaluate the effects of the surface irrigation scheduling method (existing rule) adopted by the irrigation agency on winter wheat production compared to a full irrigation method and ii) to evaluate drip irrigation versus surface irrigation impacts on water saving and yield of winter wheat. The methodology was based on the FAO-56 dual approach for the surface irrigation scheduling. Ground measurements of the Normalized Difference Vegetation Index (NDVI) were used to derive the basal crop coefficient and the vegetation fraction cover. The simple FAO-56 approach was used for drip irrigation scheduling. For surface irrigation, the existing rule approach resulted in yield and WUE reductions of 22% and 15%, respectively, compared with the optimized irrigation scheduling proposed by the FAO-56 for full irrigation treatment. This revealed the negative effects of the irrigation schedules adopted in irrigation schemes under rotational water supply on crops productivity. It was also demon-strated that drip irrigation applied to wheat was more efficient with 20% of water saving in comparison with surface irrigation (full irrigation treatment). Drip irrigation gives also higher wheat yield compared to surface irrigation (+28% and +52% for full irrigation and existing rule treatments respectively). The same improvement was observed for water use efficiency (+24 and +59% respectively).
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Claims 7
Claim · model-written summary
Existing surface irrigation rules reduced yield by 22% relative to optimized full irrigation.
- Taxon
- winter wheat
Triticum aestivumt0 - Treatment
- existing rule approache0
- Outcome
- yielde0
- Direction
- reductionse0
- Value
- 22%e0
- Comparator
- full irrigation treatmente0
- Setting
- Haouz irrigated area in Moroccoe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For surface irrigation, the existing rule approach resulted in yield and WUE reductions of 22% and 15%, respectively, compared with the optimized irrigation scheduling proposed by the FAO-56 for full irrigation treatment.”
t0“winter wheat”
e1“Haouz irrigated area in Morocco”
Claim · model-written summary
Existing surface irrigation rules reduced WUE by 15% relative to optimized full irrigation.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- existing rule approache0
- Outcome
- WUEe0
- Direction
- reductionse0
- Value
- 15%e0
- Comparator
- full irrigation treatmente0
- Setting
- Haouz irrigated area in Moroccoe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For surface irrigation, the existing rule approach resulted in yield and WUE reductions of 22% and 15%, respectively, compared with the optimized irrigation scheduling proposed by the FAO-56 for full irrigation treatment.”
t0“winter wheat”
e1“Haouz irrigated area in Morocco”
Claim · model-written summary
Drip irrigation saved 20% water relative to full surface irrigation.
- Taxon
- wheatTriticum aestivume0
- Treatment
- drip irrigatione0
- Outcome
- water savinge0
- Direction
- more efficiente0
- Value
- 20%e0
- Comparator
- surface irrigatione0
- Setting
- Haouz irrigated area in Moroccoe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drip irrigation applied to wheat was more efficient with 20% of water saving in comparison with surface irrigation (full irrigation treatment)”
e1“Haouz irrigated area in Morocco”
Claim · model-written summary
Drip irrigation raised wheat yield 28% relative to full surface irrigation.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Drip irrigatione0
- Outcome
- wheat yielde0
- Direction
- highere0
- Value
- +28%e0
- Comparator
- full irrigatione0
- Setting
- Haouz irrigated area in Moroccoe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drip irrigation gives also higher wheat yield compared to surface irrigation (+28% and +52% for full irrigation and existing rule treatments respectively).”
e1“Haouz irrigated area in Morocco”
Claim · model-written summary
Drip irrigation raised wheat yield 52% relative to existing surface irrigation rules.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Drip irrigatione0
- Outcome
- wheat yielde0
- Direction
- highere0
- Value
- +52%e0
- Comparator
- existing rule treatmentse0
- Setting
- Haouz irrigated area in Moroccoe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drip irrigation gives also higher wheat yield compared to surface irrigation (+28% and +52% for full irrigation and existing rule treatments respectively).”
e1“Haouz irrigated area in Morocco”
Claim · model-written summary
Drip irrigation improved water use efficiency by the reported +24 relative to full surface irrigation.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Drip irrigatione1
- Outcome
- water use efficiencye0
- Direction
- improvemente0
- Value
- +24e0
- Comparator
- full irrigatione1
- Setting
- Haouz irrigated area in Moroccoe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same improvement was observed for water use efficiency (+24 and +59% respectively).”
e1“Drip irrigation gives also higher wheat yield compared to surface irrigation (+28% and +52% for full irrigation and existing rule treatments respectively).”
e2“Haouz irrigated area in Morocco”
Claim · model-written summary
Drip irrigation improved water use efficiency by 59% relative to existing surface irrigation rules.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Drip irrigatione1
- Outcome
- water use efficiencye0
- Direction
- improvemente0
- Value
- +59%e0
- Comparator
- existing rule treatmentse1
- Setting
- Haouz irrigated area in Moroccoe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same improvement was observed for water use efficiency (+24 and +59% respectively).”
e1“Drip irrigation gives also higher wheat yield compared to surface irrigation (+28% and +52% for full irrigation and existing rule treatments respectively).”
e2“Haouz irrigated area in Morocco”
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