Journal of Food, Agriculture and Environment

Maize productivity as influenced by different nitrogen levels and climate change 

Author(s):

Virmantas Povilaitis, Sigitas Lazauskas, Dalia Feizienė, Arnas Kukujevas, Virginijus Feiza*

Recieved Date: 2012-09-16, Accepted Date: 2013-04-22

Abstract:

The current study was carried out in 2010-2011 at the Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry on an Endocalcari-Epihypogleyic Cambisol (CMg-p-w-can) soil. Research was aimed at investigation of biomass accumulation of maize grown under different levels of nitrogen fertilization as well as simulation of the likely impact of increased air temperatures in September. In the 2010 and 2011 seasons, the average air temperature from May 1 to September 30 was by 3ºC and 2ºC, respectively, higher than the local average (14.6ºC) of the 1961- 1990 period. In the field experiments, biomass accumulation of the short-season maize variety ‘Ixxes’ followed somewhat different pattern under conditions of adequate moisture supply in 2011 and temporary water deficit in 2010; however, the effect of nitrogen was alike. Simulation performed with the DSSATv4.0.2.0 model suggests that short-season maize varieties will respond to increasing September air temperatures by shorter growing season and reduced biomass yield; however, the extent of the impact will depend on temperature and rainfall regime during the growing season. Medium-season varieties can be preeminent and produce more biomass under warmer September conditions; however, careful examination of frost risks should precede introduction of such maize varieties with a higher yield potential in Lithuania. 

Keywords:

Maize, biomass, nitrogen, climate change, DSSATv4 model, Cambisol, water shortage

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 2
Category: Environment
Pages: 803-807

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