Horticulture Research Station

Nitrogen Release and Mineralization Rates of Various Fertilizers Applied on Kentucky Bluegrass

Authors: A.J. Lindsey (Iowa State University) , Adam Thoms (Iowa State University) , Nick E. Christians (Iowa State University)

Abstract

Enhanced efficiency fertilizers (EEF) allow increased plant uptake and reduce the potential of nutrient losses to the environment. This can be achieved by considering a controlled/slow release fertilizer or by using nitrification/urease inhibitors, which slow the conversion of nitrogen. Humic substances are organic compounds that have been shown to improve nutrient availability for plant absorption, increased soil water holding capacity, and increased cation exchange capacity of soils. There are many claims of the benefits of humic products on turfgrass, which include increased nutrient uptake and efficiency and increased effectiveness of fertilizers. The objective of this study is to determine if the addition of humic substances and poly/humic coatings can be classified as an enhanced efficiency fertilizer. This is part of the first year of a two-year study.

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How to Cite: Lindsey, A. , Thoms, A. & Christians, N. E. (2020) “Nitrogen Release and Mineralization Rates of Various Fertilizers Applied on Kentucky Bluegrass”, Iowa State University Research and Demonstration Farms Progress Reports. 2019(1).