Abstract
ABSTRACT One would expect foliar applied phosphorus (P) to have higher use efficiencies than when applied to the soil, but limited information is available concerning this. Experiments were conducted in 2002, 2003, and 2004 to determine the effect of foliar applications of P on winter wheat grain yields, P uptake, and use efficiency. Twelve treatments containing varying foliar P rates (0, 1, 2, and 4 kg ha− 1 in 2002 and 2003 and additional 8, 12, 16, and 20 kg ha− 1 in 2004) with and without pre-plant rates of 30 kg ha− 1 were evaluated. Foliar applications of P at Feekes 7 generally increased grain yields and P uptake versus no foliar P. Use efficiency was higher when P was applied at Feekes 10.54. Results from this study suggested that low rates of foliar applied P might correct mid-season P deficiency in winter wheat, and that might result in higher P use efficiencies. Keywords: winter wheatfoliar phosphorusphosphorus use efficiencyphosphorus uptake ACKNOWLEDGMENT Contribution from the Oklahoma Agricultural Experiment Station, Stillwater, OK. Notes a Rates are as presented in Table 2. All contrasts involving foliar application stages were made only at the same rate of P (i.e., 2 kg P ha−1). a Refer to Table 2 for treatment description. a Refer to Table 2 for treatment description. a Refer to Table 2 for treatment description. a Refer to Table 2 for treatment description.
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Claims 4
Claim · model-written summary
Foliar P applied at Feekes 7 increased grain yield and P uptake relative to no foliar P.
- Taxon
- Winter Wheat
Triticum aestivumt0 - Treatment
- Foliar applications of P at Feekes 7e1
- Outcome
- grain yields and P uptakee1
- Direction
- increasede1
- Comparator
- no foliar Pe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Foliar applications of P at Feekes 7 generally increased grain yields and P uptake versus no foliar P”
t0“Effect of Foliar Application of Phosphorus on Winter Wheat Grain Yield, Phosphorus Uptake, and Use Efficiency”
Claim · model-written summary
P applied at Feekes 10.54 gave higher use efficiency.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- P was applied at Feekes 10.54e2
- Outcome
- Use efficiencye2
- Direction
- highere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Use efficiency was higher when P was applied at Feekes 10.54”
t0“Effect of Foliar Application of Phosphorus on Winter Wheat Grain Yield, Phosphorus Uptake, and Use Efficiency”
Claim · model-written summary
Low rates of foliar applied P might correct mid-season P deficiency in winter wheat.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- low rates of foliar applied Pe3
- Outcome
- mid-season P deficiencye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Results from this study suggested that low rates of foliar applied P might correct mid-season P deficiency in winter wheat, and that might result in higher P use efficiencies”
t0“Effect of Foliar Application of Phosphorus on Winter Wheat Grain Yield, Phosphorus Uptake, and Use Efficiency”
Claim · model-written summary
Low rates of foliar applied P might result in higher P use efficiency.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- low rates of foliar applied Pe3
- Outcome
- P use efficienciese3
- Direction
- highere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Results from this study suggested that low rates of foliar applied P might correct mid-season P deficiency in winter wheat, and that might result in higher P use efficiencies”
t0“Effect of Foliar Application of Phosphorus on Winter Wheat Grain Yield, Phosphorus Uptake, and Use Efficiency”
The same questions in other papers
application · yield · Triticum aestivum (wheat)Positive and negative results
794 papers in the same direction as this paper · 75 in the opposite direction · 7 reporting no difference from an alternative
- no effect
- no effect
- positive
873 papers more in this group
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