Can additional N fertiliser ameliorate the elevated CO2-induced depression in grain and tissue N concentrations of wheat on a high soil N background?
M Tausz, RM Norton, S Tausz-Posch, M Low, S Seneweera, G O'Leary, R Armstrong, GJ Fitzgerald
JOURNAL OF AGRONOMY AND CROP SCIENCE | WILEY | Published : 2017
Elevated COâ stimulates crop yields but leads to lower tissue and grain nitrogen concentrations [N], raising concerns about grain quality in cereals. To test whether N fertiliser application above optimum growth requirements can alleviate the decline in tissue [N], wheat was grown in a Free Air COâ Enrichment facility in a lowârainfall cropping system on high soil N. Crops were grown with and without addition of 50â60Â kg N/ha in 12 growing environments created by supplemental irrigation and two sowing dates over 3Â years. Elevated COâ increased yield and biomass (on average by 25%) and decreased biomass [N] (3%â9%) and grain [N] (5%). Nitrogen uptake was greater (20%) in crops g..View full abstract
Related Projects (1)
Grains Research and Development Corporation; Australian Commonwealth Department of Agriculture and Water Resources