OVERVIEW
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Monoammonium phosphate (MAP) is commonly used as a P fertilizer applied to winter wheat.
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In addition to nitrogen (N) and P, other nutrients like S and Zn are beneficial to achieve maximum yield and better nutritional quality.
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MicroEssentials® SZ® contains N, P, S and Zn in one nutritionally balanced granule, providing the uniform nutrient distribution, improved nutrient uptake and season-long sulfur availability required for higher yields and profitability.
TRIAL DETAILS
Crop: Winter Wheat (Triticum aestivum, winter)
Years: 2012-2014
Locations: 17 trials across the U.S. and Canada
United States – IL, IN, KS, MS, NE, OH, OK, VA
Canada – ON
Cropping Conditions:
P Source: MAP, MAP + AS + ZnSO4 and MicroEssentials® SZ™
P Rate: MAP and MicroEssentials® SZ®: 0, 30 and 60 lbs P₂O₅/ac MAP + AS + ZnSO₄: 60 lbs P₂O₅/ac
K Rate: As required by soil test, applied to entire trial
Application Timing: Preplant
Application Method: Broadcast
Parameters Measured: Grain Yield
Grain nutrient conectnration P, S, Zn (12 of 17 locations)
Results
Fig. 1 Wheat yield response to different P sources and rates. Note: MAP + AS + ZnSO₄ was only tested at 60 lbs P₂O₅ /ac.
SUMMARY
At 60 lbs P₂O₅/ac, MicroEssentials® 4.2 bu/ac (6.0%) higher yield than MAP and 2.5 bu/ac (3.5%) higher yield than the MAP blend
The 30 lbs P₂O₅/ac of MicroEssentials® SZ® outperformed the 60 lbs P₂O₅/ac rate of MAP and the MAP blend. This demonstrates the increased P efficiency of MicroEssentials® SZ® compared to MAP.
Grain nutrient concentrations were higher in MicroEssentials® SZ® treatments than MAP or MAP blend treatments. Compared to MAP, MicroEssentials® SZ® demonstrated the following increases: 3.8% for P, 4.1% for S and 2.4% for Zn.
MicroEssentials® SZ® demonstrated higher yield and grain nutrient concentration compared to MAP or a MAP blend. Applying MicroEssentials® SZ® results in maximum yield and increased nutrient efficiency.
