Abstract
Crop production in arid/semi-arid regions is restricted by soil moisture and nitrogen (N) deficiencies. Consequently, sufficient levels of N and irrigation are important in improving the crop's productivity. Therefore, a 2-year field experiment was conducted to understand influences of watering techniques namely 300, 500 and 700 mm with contrasting N supply (0, 60, 120 and 180 kg ha−1) on wheat cv. “landrace” productivity, dry matter translocation (DMT) and contribution of pre-anthesis assimilates to the grain (CPAAG, %). Experiments were conducted each year using a split-plot design with three replications at a private farm, North Hamedan Province, Iran. Accordingly, when 500/700 mm water was applied, CPAAG values were higher than those obtained after applying 300 mm water, i.e. 49.99 and 45.45 vs. 40.13%. The highest productivity in terms of grain yield, grain N concentration, nitrogen harvest index, special products analysis division and protein content was achieved in normal deficiencies of irrigation and N. This was further supported by a higher leaf area index, crop growth rate and N uptake of such treatment. Meanwhile, co-application of 120 kg N and 500 mm water significantly improved DMT, water and N use efficiency, and it was the optimal scheme for wheat production.
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Claims 8
Claim · model-written summary
At 500 mm water, contribution of pre-anthesis assimilates to grain was 49.99% versus 40.13% at 300 mm.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- 500/700 mm watere0
- Outcome
- CPAAG valuese0
- Direction
- highere0
- Value
- 49.99e0
- Comparator
- 300 mm watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when 500/700 mm water was applied, CPAAG values were higher than those obtained after applying 300 mm water, i.e. 49.99 and 45.45 vs. 40.13%”
t0“wheat”
Claim · model-written summary
At 700 mm water, contribution of pre-anthesis assimilates to grain was 45.45% versus 40.13% at 300 mm.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 500/700 mm watere0
- Outcome
- CPAAG valuese0
- Direction
- highere0
- Value
- 45.45e0
- Comparator
- 300 mm watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when 500/700 mm water was applied, CPAAG values were higher than those obtained after applying 300 mm water, i.e. 49.99 and 45.45 vs. 40.13%”
t0“wheat”
Claim · model-written summary
Normal deficiencies of irrigation and nitrogen gave the highest grain yield, grain nitrogen concentration and nitrogen harvest index.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- normal deficiencies of irrigation and Ne0
- Outcome
- grain yield, grain N concentration, nitrogen harvest indexe0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest productivity in terms of grain yield, grain N concentration, nitrogen harvest index, special products analysis division and protein content was achieved in normal deficiencies of irrigation and N”
t0“wheat”
Claim · model-written summary
Normal deficiencies of irrigation and nitrogen gave the highest special products analysis division and protein content.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- normal deficiencies of irrigation and Ne0
- Outcome
- special products analysis division and protein contente0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest productivity in terms of grain yield, grain N concentration, nitrogen harvest index, special products analysis division and protein content was achieved in normal deficiencies of irrigation and N”
t0“wheat”
Claim · model-written summary
The same treatment had higher leaf area index, crop growth rate and nitrogen uptake.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- normal deficiencies of irrigation and Ne1
- Outcome
- leaf area index, crop growth rate and N uptakee0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was further supported by a higher leaf area index, crop growth rate and N uptake of such treatment”
e1“normal deficiencies of irrigation and N”
t0“wheat”
Claim · model-written summary
Co-application of 120 kg N and 500 mm water significantly improved dry matter translocation.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 120 kg N and 500 mm watere0
- Outcome
- DMTe0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“co-application of 120 kg N and 500 mm water significantly improved DMT, water and N use efficiency”
t0“wheat”
Claim · model-written summary
Co-application of 120 kg N and 500 mm water significantly improved water use efficiency.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 120 kg N and 500 mm watere0
- Outcome
- water and N use efficiencye0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“co-application of 120 kg N and 500 mm water significantly improved DMT, water and N use efficiency”
t0“wheat”
Claim · model-written summary
The authors recommend 120 kg N with 500 mm water as the optimal scheme for wheat production.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 120 kg N and 500 mm watere0
- Outcome
- optimal scheme for wheat productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“co-application of 120 kg N and 500 mm water significantly improved DMT, water and N use efficiency, and it was the optimal scheme for wheat production”
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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.