Abstract
This study was conducted to determine the influence of deficit irrigation on grain yield and some morphological traits of wheat cultivars. The experiment was a split plot randomized complete block design in four replications over two successive cropping seasons (2006-2008) at the Agricultural Research Station in Zahak, Iran. In the main plots were the different levels of deficit irrigation: T1= irrigation at all stages (full irrigation), T2= no irrigation before stem elongation, T3= no irrigation before flowering and T4= no irrigation before grain filling. Sampled in the sub plots were the four wheat cultivars: Hamoon, Kavir, Dez and Peethee nr2. The results of combined analysis of variance showed that the effect of irrigation in both seasons was significant on grain yield and morphological traits. The highest grain yield resulted from irrigation at all stages with a yield of 6275 kg/ha. Deficit irrigation was found to decrease grain yield by 5% at no irrigation before stem elongation, by 32% at no irrigation before flowering and by 52% at no irrigation before grain filling. Deficit irrigation affected the characteristics of; spikes/m 2 , biomass and harvest index. Grain yields were significantly different between the cultivars: Hamoon and Kavir cultivars produced the highest (5540kg/ha) and the least (4326kg/ha) grain yields, respectively. Hamoon had a higher drought tolerance therefore greater grain yield than the other cultivars in conditions of a drought-prone environment.
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Claims 9
Claim · model-written summary
Full irrigation produced the highest grain yield, 6275 kg/ha.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- irrigation at all stagese0
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 6275 kg/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield resulted from irrigation at all stages with a yield of 6275 kg/ha”
t0“wheat cultivars”
Claim · model-written summary
No irrigation before stem elongation decreased grain yield by 5%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- no irrigation before stem elongatione0
- Outcome
- grain yielde0
- Direction
- decreasee0
- Value
- 5%e0
- Comparator
- full irrigatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deficit irrigation was found to decrease grain yield by 5% at no irrigation before stem elongation, by 32% at no irrigation before flowering and by 52% at no irrigation before grain filling”
e1“T1= irrigation at all stages (full irrigation)”
t0“wheat cultivars”
Claim · model-written summary
No irrigation before flowering decreased grain yield by 32%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- no irrigation before floweringe0
- Outcome
- grain yielde0
- Direction
- decreasee0
- Value
- 32%e0
- Comparator
- full irrigatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deficit irrigation was found to decrease grain yield by 5% at no irrigation before stem elongation, by 32% at no irrigation before flowering and by 52% at no irrigation before grain filling”
e1“T1= irrigation at all stages (full irrigation)”
t0“wheat cultivars”
Claim · model-written summary
No irrigation before grain filling decreased grain yield by 52%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- no irrigation before grain fillinge0
- Outcome
- grain yielde0
- Direction
- decreasee0
- Value
- 52%e0
- Comparator
- full irrigatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deficit irrigation was found to decrease grain yield by 5% at no irrigation before stem elongation, by 32% at no irrigation before flowering and by 52% at no irrigation before grain filling”
e1“T1= irrigation at all stages (full irrigation)”
t0“wheat cultivars”
Claim · model-written summary
Deficit irrigation affected spikes per square metre, biomass, and harvest index.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Deficit irrigatione0
- Outcome
- spikes/m 2 , biomass and harvest indexe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deficit irrigation affected the characteristics of; spikes/m 2 , biomass and harvest index”
t0“wheat cultivars”
Claim · model-written summary
Hamoon had the highest cultivar grain yield, 5540kg/ha.
- Taxon
- wheatTriticum aestivumt0
- Material
- Hamoone0
- Outcome
- grain yieldse0
- Direction
- higheste0
- Value
- 5540kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hamoon and Kavir cultivars produced the highest (5540kg/ha) and the least (4326kg/ha) grain yields, respectively”
t0“wheat cultivars”
Claim · model-written summary
Kavir had the lowest cultivar grain yield, 4326kg/ha.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hamoon and Kavir cultivars produced the highest (5540kg/ha) and the least (4326kg/ha) grain yields, respectively”
t0“wheat cultivars”
Claim · model-written summary
Hamoon had higher drought tolerance than other cultivars.
- Taxon
- wheatTriticum aestivumt0
- Material
- Hamoone0
- Outcome
- drought tolerancee0
- Direction
- highere0
- Comparator
- the other cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hamoon had a higher drought tolerance therefore greater grain yield than the other cultivars in conditions of a drought-prone environment”
t0“wheat cultivars”
Claim · model-written summary
Hamoon had greater grain yield than other cultivars in a drought-prone environment.
- Taxon
- wheatTriticum aestivumt0
- Material
- Hamoone0
- Outcome
- grain yielde0
- Direction
- greatere0
- Comparator
- the other cultivarse0
- Setting
- drought-prone environmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hamoon had a higher drought tolerance therefore greater grain yield than the other cultivars in conditions of a drought-prone environment”
t0“wheat cultivars”
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See all 989 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.