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Evaluation of Phosphate and Nitrogen Fertilizers Treated with Polymer Additives to Increase Fertilizer Efficiency

The Richardson International Kelburn, MB research and demonstration farm was the site of experiments evaluating Avail additive for both dry granular and liquid phosphate fertilizers. there were also experiments evaluating Nutrisphere additive for urea N fertilizer.

IPNI-2008-CAN-MB21

Overview Related Article
30 Apr 2008

Methodology


The study will be located on Grey Luvisolic soils near Dawson Creek, BC and Breton, AB with clay loam textured soils; and Black Chernozemic soils near Edmonton, AB, Indian Head, SK and Howden, MB with clay, loam, and clay textured soils respectively.

The Avail-P experiments will consist of a randomized complete block (RCB) design replicated four times at each site and include the seed row fertilizer treatments listed in the Table 1 below. All plots will receive an N application of 100 kg N/ha as banded or side-banded urea.

Table 1. Avail P Experimental Treatments
Treatment Number
P Form
Kg P2O5/ha
1
11-52-0
15
2
11-52-0
30
3
11-52-0 + Avail
15
4
11-52-0 + Avail
30
5
10-34-0
15
6
10-34-0
30
7
10-34-0 + Avail
15
8
10-34-0 + Avail
30
9
Check
0

The Nutrisphere experiments will consist of a randomized complete block (RCB) design replicated four times at each site and include N treatments as pre-plant banded or at planting side-banded, or surface broadcast treatments as listed in Table 2 below. Seed row fertilizer will include P, K and S fertilizer as required based on soil test results.

Table 2. Nutrisphere N Experimental Treatments
Treatment Number
N FormN Placement
N kg/ha
1
UreaBanded
60
2
UreaBanded
120
3
UreaSurface Broadcast
60
4
UreaSurface Broadcast
120
5
Nutrisphere treated UreaBanded
60
6
Nutrisphere treated UreaBanded
120
7
Nutrisphere treated UreaSurface Broadcast
60
8
Nutrisphere treated UreaSurface Broadcast
120
9
Super UreaBanded
60
10
Super UreaBanded
120
11
Super UreaSurface Broadcast
60
12
Super UreaSurface Broadcast
120
13
CheckNA
0