Abstract
Abstract BACKGROUND Low phosphorus (P) availability to wheat from commercial fertilizers is one of the reasons for lower grain yield and hence justifies search for more efficient P source under alkaline calcareous soils. RESULTS Phosphoric acid ( PA ) and diammonium phosphate ( DAP ), applied through conventional and modified methods, were assessed for P supply and wheat yield in a calcareous soil. Under laboratory conditions, pre‐incubated soil with 70 mg P kg −1 soil as PA and DAP was assessed for solution P ( C p ) for 4 weeks. Phosphorus sorption data were fitted using the Freundlich model for describing analyzed sorption in soil incubated with or without DAP and PA . The fitted model equations exhibited comparatively higher effluxes of P from the solution system in control treatment. Compared to DAP , lower quantities (19.6%) of P for PA ‐treated soil were required for producing optimum P concentration in soil solution, i.e. 0.2 mg P L −1 . The greenhouse study involved 32 P tracer technique to quantify the proportion of applied P derived by wheat from fertilizer or soil. The results showed that P derived from fertilizer was highest (47.5%) in PA placement, while the lowest (31.5%) was in DAP broadcast treatment. The field study also showed similar trends to that of the greenhouse study. The PA placement treatment resulted in highest (23.4%) phosphorus use efficiency, whereas the lowest one (17.1%) was recorded for DAP broadcast treatment. CONCLUSION PA proved to be a better P source than DAP for improving P content and achieving higher yield and recovery of applied P by wheat grown in alkaline calcareous soils. © 2016 Society of Chemical Industry
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Claims 5
Claim · model-written summary
Phosphoric acid treated soil required 19.6% less phosphorus than diammonium phosphate treated soil to reach optimum solution phosphorus.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- PA ‐treated soile0
- Outcome
- P concentration in soil solutione0
- Direction
- lowere0
- Value
- 19.6%e0
- Qualifier
- 0.2 mg P L −1e0
- Comparator
- DAPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to DAP , lower quantities (19.6%) of P for PA ‐treated soil were required for producing optimum P concentration in soil solution, i.e. 0.2 mg P L −1 .”
t0“wheat”
Claim · model-written summary
Wheat derived the highest proportion of phosphorus from fertilizer under phosphoric acid placement, 47.5%, versus the lowest 31.5% under broadcast diammonium phosphate.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- PA placemente0
- Outcome
- P derived from fertilizere0
- Direction
- higheste0
- Value
- 47.5%e0
- Qualifier
- 31.5%e0
- Comparator
- DAP broadcast treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that P derived from fertilizer was highest (47.5%) in PA placement, while the lowest (31.5%) was in DAP broadcast treatment.”
t0“wheat”
Claim · model-written summary
Phosphoric acid placement yielded the highest phosphorus use efficiency, 23.4%, compared with 17.1% for broadcast diammonium phosphate.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- PA placement treatmente0
- Outcome
- phosphorus use efficiencye0
- Direction
- higheste0
- Value
- 23.4%e0
- Qualifier
- 17.1%e0
- Comparator
- DAP broadcast treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PA placement treatment resulted in highest (23.4%) phosphorus use efficiency, whereas the lowest one (17.1%) was recorded for DAP broadcast treatment.”
t0“wheat”
Claim · model-written summary
The field study showed trends similar to the greenhouse study.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- similar trendse0
- Comparator
- greenhouse studye0
- Setting
- fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The field study also showed similar trends to that of the greenhouse study.”
t0“wheat”
Claim · model-written summary
The authors conclude that phosphoric acid was a better phosphorus source than diammonium phosphate for wheat phosphorus content, yield and fertilizer phosphorus recovery in alkaline calcareous soils.
- Taxon
- wheatTriticum aestivume0
- Treatment
- PAe0
- Outcome
- P content and achieving higher yield and recovery of applied Pe0
- Direction
- bettere0
- Comparator
- DAPe0
- Setting
- alkaline calcareous soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PA proved to be a better P source than DAP for improving P content and achieving higher yield and recovery of applied P by wheat grown in alkaline calcareous soils.”
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