Phosphorus Placement Effects on Phosphorous Recovery Efficiency and Grain Yield of Wheat under No-Tillage in the Humid Pampas of Argentina
Table 4
Accumulated phosphorous in aerial dry matter. P content in grain and phosphorous harvest index (PHI) at Tandil and Necochea experimental sites.
Tillering
First node
Flowering
PM
P Grain
PHI
Tandil
P response
kg P ha−1
%
0
0.42 b
3.63 c
16.70 b
14.55 b
12.74 c
0.87 a
25
0.96 ab
7.05 bc
16.42 b
19.06 b
15.17 bc
0.80 a
50
1.24 ab
8.52 b
20.10 ab
20.13 ab
16.57 ab
0.82 a
150
1.61 a
14.8 a
24.31 a
25.32 a
19.08 a
0.76 a
Broadcast ()
0.88 a
7.74 a
18.92 a
19.93 a
16.00 a
0.81 a
Banded ()
1.32 a
7.84 a
17.60 a
19.27 a
15.74 a
0.81 a
×
ns
ns
ns
ns
ns
ns
Necochea
P response
kg P ha−1
%
0
0.72 d
6.66 c
14.64 c
18.15 c
14.07 c
0.78 a
25
1.83 c
10.18 cb
18.03 bc
22.34 bc
17.47 b
0.78 a
50
2.49 b
12.78 b
21.25 b
26.71 b
19.60 a
0.78 a
150
3.12 a
16.88 a
26.39 a
34.73 a
20.70 ab
0.58 b
Broadcast ()
1.59 b
12.04 a
19.72 a
24.57 a
18.93 a
0.77 a
Banded ()
2.65 a
10.93 a
19.66 a
24.47 a
19.24 a
0.79 a
×
ns
ns
ns
ns
ns
ns
Means in the same column followed by the same letter are not significantly different from each other based on the Duncan test (0.05). Phosphorus response is compared using 0, 25, 50, and 150 P rates. Phosphorus placement method is only compared at 25 and 50 P rates PM: physiological maturity; ns: not significant.
