Abstract
The differences between common phosphorus (P) fertilizers as a starter in corn production have been studied for many years. However, little research has been conducted showing which P fertilizer sources are most effective with varying compositions of orthoand poly-phosphate. The objectives of this study were to evaluate three commercially available P fertilizers, 0-16-19, 10-34-0, and 0-18-18 (N-P2O5-K2O) as starter band with and without the addition Cee*Quest-70 (CQ-70), a glucoheptonate chelate. The study was conducted at two locations, Scandia and Rossville, in 2014 and 2015. Experimental design was a randomized, complete block with four replications and a factorial treatment arrangement. Whole plant corn tissue samples were taken at V-6 and weighted for biomass. Tissue samples were analyzed for P. Yield, V-6 biomass, and V-6 P uptake were analyzed for treatment differences. Results show that there were no yield differences between P fertilizers with or without the addition of CQ-70. Phosphorus fertilizer was found to have a significant effect on P V-6 tissue concentration at the Rossville location. However, there was no effect on P uptake. Fertilizer source was found to have a significant effect on V-6 biomass and P uptake.
Highlights
Starter fertilizers usually consist of P and potassium (K) since seedling uptake of P and K are greatest in early growth
The differences between common phosphorus (P) fertilizers as a starter in corn production have been studied for many years
Little research has been conducted showing which P fertilizer sources are most effective with varying compositions of ortho- and poly-phosphate
Summary
Starter fertilizers usually consist of P and potassium (K) since seedling uptake of P and K are greatest in early growth. Starter fertilizers placed in proximity of the root zone enhance nutrient availability (Jokela, 1992), especially P and K (Barber and Kovar, 1985). The most common fertilizers used as starters consist mainly of P and K; some research has shown the addition of N placed with P results in greater uptake of P (Olson and Drier, 1956; Kamprath, 1987). The effects of starter fertilizer have shown an increase in early nutrient uptake (Randall and Hoeft, 1988; Rehm and Lamb, 2009). Yield effects are inconsistent, even with an increase in early season growth (Vetsch and Randall, 2002)
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