Soil Net Nitrogen Mineralization and Leaching under Miscanthus × giganteus and Zea mays

Themes: Sustainability

Keywords: Biomass Analytics, Field Data


Studt, J.Heaton, E., McDaniel, M.D. June 10, 2021. “Soil Net Nitrogen Mineralization and Leaching under Miscanthus × giganteus and Zea mays.” Iowa State University. DOI: 10.25380/iastate.14695989.v1.


Relationship between annual cumulative net N mineralization and N leached (past 50 cm soil depth) for (a) 0 kg N ha-1 y-1 and (b) 224 kg N ha-1 y-1 fertilizer rates.

Research objectives were to compare whether miscanthus (Miscanthus × giganteus Greef et Deu.) would leach less nitrogen (N) than continue maize (Zea mays L.) and how soil net N mineralization (Nmin) may explain observed leaching. The experiment included three factors: 1) cropping system (maize, juvenile miscanthus = 1-2 y old, mature miscanthus = 3-4 y old); 2) N fertilization (0 and 224 kg N ha-1); and 3) environment (four site-years at two locations in Iowa, USA that differed in climate and soil fertility). During the 2017 and 2018 growing seasons a variety of soil measurements, including inorganic soil N (ammonium + nitrate), in situ Nmin, and N leaching were taken to better understand the differences in N cycling dynamics associated with each system.


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