Response of Winter Wheat Grain Yield and Phosphorus Uptake to Foliar Phosphite Fertilization

Table 6

Mean winter wheat P uptake (kg ha⁻¹) as affected by treatments at Perkins and Perry in 2009/2010 and at Perkins, Morrison and Perry in 2010/2011.

Treatment	Perkins	Perry	Perkins	Morrison	Perry
	P uptake (kg ha^−1)
Nontreated	3.36 ab	4.39	2.24	2.08 b^‡	2.00
NP 100%	4.66 a	6.02	5.31	3.69 ab	3.17
Nutr2x^†	4.98 a	4.74	4.21	3.89 ab	1.91
P 100% only	4.03 ab	4.12	4.14	4.52 ab	2.32
P 100% + Nutr1x	4.40 a	4.19	4.04	3.10 ab	1.79
P 100% + Nutr2x	3.29 ab	5.28	2.03	2.92 ab	2.12
N 75% & P 80%	1.87 b	---^¶	2.00	3.61 ab	2.48
N 75% & P 80% + Nutr2x	2.76 ab	—	3.5	4.91 a	2.12
Duncan's multiple range	2.20	NS§	NS	2.51	NS

†Nutr1x: one application of Nutri-phite at 2–4 leaf stage (GS 12 to 14); Nutr2x: two applications of Nutri-phite at GS 2–4 and booting to flowering stages (GS 49–53); ^‡down a column, means followed by the same letter are not significantly different at 𝑃≤0.05 based on Duncan's multiple range test); §NS: nonsignificant; ¶data were not available.