Abstract
Limitations of water and nitrogen in soil usually restrict plant growth. The objective of this study was to evaluate the effects of different amounts of supplemental irrigation at different growth stages and application of different rates of nitrogen fertilizer on grain yield and water productivity of wheat cultivars. A field experiment was conducted in the agricultural research station of Shahrekord University, Iran, for 2 years. The experiment had a split-split plot design with 3 replications. Five irrigation treatments occupied the main plots, two wheat cultivars were the sub-plots, and three levels of nitrogen were allocated to the sub-subplots. Seed yield and water productivity increased with the total amount of water available to plants. Water productivity increased linearly with increasing additional irrigation from the jointing stage to the seed filling stage, in both years. However, the rate of grain yield and water productivity in irrigation treatment at the jointing stage was greater than the other irrigation treatments. Both wheat varieties showed positive response to supplemental irrigation treatments and nitrogen fertilizer, but the rate of grain yield and water productivity was greater in Azar2 cultivar. Additional nitrogen fertilizers also increased seed yield and water productivity in both years. Generally, the combination of supplemental irrigation at jointing stage and application of 100 kg nitrogen ha-1 have important roles in the improvement of seed yield and water productivity of Sardari wheat cultivar under semi arid region.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
Seed yield increased with total available water.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- total amount of water available to plantse0
- Outcome
- Seed yielde0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield and water productivity increased with the total amount of water available to plants”
t0“WHEAT”
Claim · model-written summary
Water productivity increased with total available water.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- total amount of water available to plantse0
- Outcome
- water productivitye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield and water productivity increased with the total amount of water available to plants”
t0“WHEAT”
Claim · model-written summary
Water productivity increased linearly with additional irrigation from jointing through seed filling in both years.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- increasing additional irrigatione0
- Outcome
- Water productivitye0
- Direction
- increasede0
- Qualifier
- from the jointing stage to the seed filling stage, in both yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water productivity increased linearly with increasing additional irrigation from the jointing stage to the seed filling stage, in both years”
t0“WHEAT”
Claim · model-written summary
Irrigation at jointing gave a greater grain yield rate than other irrigation treatments.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- irrigation treatment at the jointing stagee0
- Outcome
- rate of grain yielde0
- Direction
- greatere0
- Comparator
- other irrigation treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of grain yield and water productivity in irrigation treatment at the jointing stage was greater than the other irrigation treatments”
t0“WHEAT”
Claim · model-written summary
Irrigation at jointing gave a greater water productivity rate than other irrigation treatments.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- irrigation treatment at the jointing stagee0
- Outcome
- water productivitye0
- Direction
- greatere0
- Comparator
- other irrigation treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of grain yield and water productivity in irrigation treatment at the jointing stage was greater than the other irrigation treatments”
t0“WHEAT”
Claim · model-written summary
Both wheat varieties responded positively to supplemental irrigation.
- Taxon
- wheatTriticum aestivume0
- Treatment
- supplemental irrigation treatmentse0
- Outcome
- positive responsee0
- Direction
- positivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both wheat varieties showed positive response to supplemental irrigation treatments and nitrogen fertilizer”
Claim · model-written summary
Both wheat varieties responded positively to nitrogen fertilizer.
- Taxon
- wheatTriticum aestivume0
- Treatment
- nitrogen fertilizere0
- Outcome
- positive responsee0
- Direction
- positivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both wheat varieties showed positive response to supplemental irrigation treatments and nitrogen fertilizer”
Claim · model-written summary
Azar2 had greater grain yield rate than the other wheat variety.
- Taxon
- wheatTriticum aestivumt0
- Material
- Azar2e0
- Outcome
- rate of grain yielde0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of grain yield and water productivity was greater in Azar2 cultivar”
t0“WHEAT”
Claim · model-written summary
Azar2 had greater water productivity rate than the other wheat variety.
- Taxon
- wheatTriticum aestivumt0
- Material
- Azar2e0
- Outcome
- water productivitye0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of grain yield and water productivity was greater in Azar2 cultivar”
t0“WHEAT”
Claim · model-written summary
Additional nitrogen increased seed yield in both years.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Additional nitrogen fertilizerse0
- Outcome
- seed yielde0
- Direction
- increasede0
- Qualifier
- both yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additional nitrogen fertilizers also increased seed yield and water productivity in both years”
t0“WHEAT”
Claim · model-written summary
Additional nitrogen increased water productivity in both years.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Additional nitrogen fertilizerse0
- Outcome
- water productivitye0
- Direction
- increasede0
- Qualifier
- both yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additional nitrogen fertilizers also increased seed yield and water productivity in both years”
t0“WHEAT”
Claim · model-written summary
The authors conclude that jointing-stage irrigation with 100 kg nitrogen ha-1 improves Sardari seed yield.
- Taxon
- wheatTriticum aestivume0
- Material
- Sardarie0
- Treatment
- supplemental irrigation at jointing stage and application of 100 kg nitrogen ha-1e0
- Outcome
- improvement of seed yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination of supplemental irrigation at jointing stage and application of 100 kg nitrogen ha-1 have important roles in the improvement of seed yield and water productivity of Sardari wheat cultivar under semi arid region”
Claim · model-written summary
The authors conclude that jointing-stage irrigation with 100 kg nitrogen ha-1 improves Sardari water productivity.
- Taxon
- wheatTriticum aestivume0
- Material
- Sardarie0
- Treatment
- supplemental irrigation at jointing stage and application of 100 kg nitrogen ha-1e0
- Outcome
- water productivitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination of supplemental irrigation at jointing stage and application of 100 kg nitrogen ha-1 have important roles in the improvement of seed yield and water productivity of Sardari wheat cultivar under semi arid region”
The same questions in other papers
fertilization · physiology: water · Triticum aestivum (wheat)Positive and negative results
98 papers in the same direction as this paper · 14 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- no effect
112 papers more in this group
See all 116 papers →irrigation · physiology: water · Triticum aestivum (wheat)Positive and negative results
252 papers in the same direction as this paper · 49 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- positive
299 papers more in this group
See all 303 papers →irrigation · yield · Triticum aestivum (wheat)Positive and negative results
797 papers in the same direction as this paper · 184 in the opposite direction · 7 reporting no difference from an alternative
- no effect
- positive
- positive
985 papers more in this group
See all 989 papers →fertilization · yield · Triticum aestivum (wheat)Positive and negative results
3,114 papers in the same direction as this paper · 284 in the opposite direction · 39 reporting no difference from an alternative
- positive
- no effect
- negative
3,434 papers more in this group
See all 3,438 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.