Abstract
Phosphorus (P) deficiency is a common crop growth-limiting factor in Mediterranean climatic and soil conditions because of low availability of native and added P, with consequent low use efficiency. Adaptation to such conditions is a function of the type of crop and also varies with genotypes within crops. The study evaluated responses of some of wheat genotypes to P application rates under typical rainfed Mediterranean climatic conditions in southern Turkey. Five wheat genotypes (Genc-99, Balatilla, Adana-99, Golia, and Panda) and five P application rates (0, 9, 17, 35 and 70 kg P ha(-1)) were used in a 2-year (2002/03, 2003/04) field experiment. In general, increasing P application level enhanced the leaf (0.18 - 0.44 %) and grain P (0.08 - 0.18%) concentrations of the genotypes. Grain yields values ranged from 1.48 - 4.85 t ha(-1) and optimum yields were achieved with 35 kg P ha(-1) application rate in both years. The relationship between leaf P and grain yield was significant in the first year, but grain P and grain yield were not significantly related. Thus, leaf P (flag leaves) concentration can be used for identification of genotypes that could be adapted to low or high soil P availability under rainfed conditions. The relative yield changed among the genotypes, especially Balatilla and Adana-99 were different from the other genotypes and had a fairly good performance. While yield and drought efficiency are major objectives in wheat breeding programs in the Mediterranean region, the study indicates that attention should also be given to crop P efficiency.
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Claims 9
Claim · model-written summary
Increasing P application enhanced leaf P concentration.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- increasing P application levele0
- Outcome
- leafe0
- Direction
- enhancede0
- Value
- 0.18 - 0.44 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing P application level enhanced the leaf (0.18 - 0.44 %) and grain P (0.08 - 0.18%) concentrations of the genotypes.”
t0“wheat genotypes”
Claim · model-written summary
Increasing P application enhanced grain P concentration.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- increasing P application levele0
- Outcome
- grain Pe0
- Direction
- enhancede0
- Value
- 0.08 - 0.18%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing P application level enhanced the leaf (0.18 - 0.44 %) and grain P (0.08 - 0.18%) concentrations of the genotypes.”
t0“wheat genotypes”
Claim · model-written summary
Grain yields ranged from 1.48 to 4.85 t per ha.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Grain yieldse0
- Direction
- rangede0
- Value
- 1.48 - 4.85 t ha(-1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields values ranged from 1.48 - 4.85 t ha(-1)”
t0“wheat genotypes”
Claim · model-written summary
Optimal grain yields occurred at 35 kg P per ha in both years.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 35 kg P ha(-1) application ratee0
- Outcome
- yieldse0
- Direction
- optimume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimum yields were achieved with 35 kg P ha(-1) application rate in both years.”
t0“wheat genotypes”
Claim · model-written summary
Leaf P and grain yield were significantly related in the first year.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- leafe0
- Compound
- Pe0
- Outcome
- grain yielde0
- Qualifier
- first yeare0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relationship between leaf P and grain yield was significant in the first year”
t0“wheat genotypes”
Claim · model-written summary
Grain P and grain yield were not significantly related.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- graine0
- Compound
- Pe0
- Outcome
- grain yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain P and grain yield were not significantly related.”
t0“wheat genotypes”
Claim · model-written summary
Relative yield differed among wheat genotypes, particularly Balatilla and Adana-99.
- Taxon
- wheatTriticum aestivumt0
- Material
- Balatilla and Adana-99e0
- Outcome
- relative yielde0
- Direction
- changede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative yield changed among the genotypes, especially Balatilla and Adana-99 were different from the other genotypes and had a fairly good performance.”
t0“wheat genotypes”
Claim · model-written summary
Leaf P concentration can identify genotypes adapted to low or high soil P availability.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- flag leavese0
- Outcome
- identification of genotypese0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf P (flag leaves) concentration can be used for identification of genotypes that could be adapted to low or high soil P availability under rainfed conditions.”
t0“wheat genotypes”
Claim · model-written summary
The authors recommend adding crop P efficiency to wheat breeding objectives.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- crop P efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“attention should also be given to crop P efficiency.”
t0“wheat genotypes”
The same questions in other papers
phosphorus · growth · Triticum aestivum (wheat)Positive and negative results
157 papers in the same direction as this paper · 34 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- no effect
189 papers more in this group
See all 193 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.