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

Table 5

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

Treatment	2009/2010				2010/2011
	Perkins	Perry	Perkins	Morrison	Perry
	Grain yield (kg ha^−1)
Nontreated	3350b^‡	4450	3365 a	2605	3485 abc
NP 100%	3280 b	3675	3405 a	2770	2545 d
Nutr2x^†	4095 a	4355	3625 a	2915	2830 bcd
P 100% only	3372 ab	3055	3090 a	2585	3470 abc
P 100% + Nutr1x	3627 ab	3825	3520 a	2405	3650 ab
P 100% + Nutr2x	3232 b	4245	2940 a	2735	3950 a
N 75% & P 80% only	3475 ab	---^¶	3475 a	2785	3180 abcd
N 75% & P 80% + Nutr2x	3710 ab	—	---	2935	2765 cd
Duncan's multiple range	731	NS§	689	NS	830

†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.