Trial Snapshot Barley National Final 2015

TRIAL SNAPSHOT Effects of Nitrogen application and sowing density on 8 barley varieties 2015 David Burch 1 , Nick Moody 1 , Ian Menz 1 and Felicity Harris 2 1. DPI NSW, Condobolin Agricultural Research and Advisory Station 2. DPI NSW, Wagga Wagga Agricultural Institute Introduction Seed and nitrogen (N) fertiliser are two of the most expensive inputs a grower must manage when sowing crops. Eight malting varieties of barley were measured at two sites; Condobolin and North Parkes with varietal responses to N at 0,30 and 90 kg/ha applied at sowing and seed density trialled at 75, 50 and 300 plants/m2 on a 30 cm row spacing. Site details Soil type: Gradational Red Earth (Condobolin), Red Brown Clay (North Parkes) Previous crop: Lucerne (Condobolin), Canola (North Parkes) 2015 Rainfall: Condobolin: 427mm (198mm April to September), Parkes: 612mm (326mm Apri l to October) Fertiliser: 70kg/ha MAP, and applications of 0, 30 and 90kg/ha of N applied at sowing as urea Soil N: Condobolin: 60.7 kg/ha, Parkes: 42.6 kg/ha, 0-60 cm cores taken before sowing Results: Tables 1 & 2. Grain yields (t/ha) of 8 barley varieties with increasing N applications at Parkes and Condobolin 2015 (NS: No significant difference, * indicates significant d ifference within variety). Table 1 Parkes N applied (kg/ha) Table 2 Condobolin N applied (kg/ha) Variety 0 30 90 Variety 0 30 90 Bass (NS) 4.938 5.112 5.15 Bass (NS) 1.056 0.882 0.580 Buloke* 5.038 5.182 4.91 Buloke* 1.043 0.953 0.688 Coander (NS) 5.35 5.265 5.201 Coander* 0.600 0.519 0.372 Copass* 5.49 5.787 5.557 Copass* 1.252 1.121 0.860 !linders (NS) 5.177 5.203 5.112 !linders (NS) 0.703 0.588 0.518 "ranger (NS) 5.34 5.595 5.383 "ranger* 0.730 0.570 0.356 #a $robe (NS) 5.639 5.802 5.597 #a $robe* 1.327 1.427 0.902 %iera* 5.286 5.304 4.716 %iera* 0.626 0.785 0.410 LSD (p= 0.05) 0.261 LSD (p=0.05) 0.221 • The P arkes trial had a negative grain y ield response from increased N fertiliser with varieties Buloke, Compass and Wimmera, with the higher N rate reducing grain yield. Grain yields of these varieties were optimised with 30kg/ha of N. All other treatments were not significantly different (table 1). • There was insufficient rainfall in the latter half of the season at the Condobolin site to utilise the N resulting in reduced yields from all N rates. All varieties responded negatively to 90kg/ha of N due to insufficient moisture availability.

Trial Snapshot Barley National Final 2015

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