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

The use of polymer additives to regular soluble fertilizers to increase the uptake of fertilizer nutrieIt is thought to slow down the reaction of the fertilizer nutrient ions and molecules with soil compounds.

IPNI-2008-CAN-AB26

The use of polymer additives to regular soluble fertilizers has been shown to increase the uptake of fertilizer nutrients into target crops. The mechanism of activity of the polymers is thought to slow down the reaction of the fertilizer nutrient ions and molecules with soil compounds. Justification The use of polymer additives to regular soluble fertilizers has been shown to increase the uptake of fertilizer nutrients into target crops. Read more


Year of initiation:2008
Year of completion:2012
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Interpretive Summary

This study is in the fourth and final year of planned research. The growing season was slightly better than average due to greater than normal precipitation in the spring and early summer, followed by warm dry weather the rest of the July, August, and through harvest in September. Research experiments evaluating polymer additives for both P and N fertilizers were conducted at two University of Alberta (AB) research farms.

This project consisted of two experiments, one at Willingdon, Alberta comparing P fertilizer sources; and another at Dapp, Alberta comparing N fertilizer sources. This study was initiated in April 2008 making this the fourth year of experiments conducted by the University of Alberta.

In 2010, only the N experiment was conducted at the University of Alberta-Ellerslie Research Farm. The P experiments at Ellerslie and Breton in Alberta were not conducted due to a shortage in summer staff. Spring wheat grew with very favorable conditions, with adequate and not excessive precipitation.

Spring wheat was grown for the N experiment at Ellerslie, Alberta, but cool and dry conditions experienced from April to July affected yield potential in the region. This could not be compensated by more favorable moisture and temperatures that appeared later in the growing season.

This project consisted of two experiments (each at Ellerslie and Breton, Alberta) evaluating the effect of adding the Avail® polymer to P fertilizers as well as a single experiment at Ellerslie which evaluated the effect of adding the Nutrisphere® polymer to granular urea fertilizer. This study was initiated in April 2008 and it is planned to be repeated again in 2009.

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Updates & Reports

2008

Project Description


Project Leader

Dick Puurveen, University of Alberta


Project Cooperators

Claire Langlois
Guy Lafond
Brian Hellegards


IPNI Staff

T. Jensen


Location

Americas \ Northern America \ CAN \ Alberta


Topics

4r source, nutrient management

barley, rapeseed (canola), wheat

Nitrogen (N), Phosphorus (P)