The GxExM interaction and effect on nitrogen uptake in Australian cotton

The interaction of genetics, environment and management and the effect on nitrogen uptake (kg N/ha) was investigated using Bollgard® 3 variety – Sicot 746 B3F. Cotton plants were sampled from first flower to maturity and divided into thirds based on total nodes, each third was then partitioned into stem, leaf and seed.

Two cotton growing regions in Australia (northern and southern New South Wales) were sampled during the 2017/18 cotton season. Both regions achieved 15.6 bales/ha, however, the plants nitrogen uptake pattern differed from first flower to maturity. Understanding why nitrogen uptake patterns differed may assist in how we can further exploit the GxExM interaction to improve efficiencies and yield.