期刊
JOURNAL OF PLANT NUTRITION
卷 29, 期 12, 页码 2147-2163出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01904160600972811
关键词
winter wheat; foliar phosphorus; phosphorus use efficiency; phosphorus uptake
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.
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