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

Table 4

Mean winter wheat grain yield (kg ha⁻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	1049	1429	698 b	873 c^‡	471 c
NP 100%	1314	1622	1413 a	1355 abc	1138 a
Nutr2x^†	1270	1277	1305 a	1498 ab	434 c
P 100% only	1178	1602	1191 a	1744 a	560 cb
P 100% + Nutr1x	1420	1113	1527 a	1497 ab	481 c
P 100% + Nutr2x	1290	1123	1321 a	1025 bc	525 c
N 75% & P 80% only	1231	1274	1236 a	1289 abc	969 ab
N 75% & P 80% + Nutr2x	867	1406	---^¶	1809 a	1223 a
Duncan's multiple range	NS^§	NS	490	506	439

†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.