Darren Chitty (Landmark)
|Contributor||West Midlands Group|
Evaluate Lokomotive as an in season foliar potassium source for correcting potassium deficiency and compare to muriate of potash (MOP).
A trial was established west of Moora in 2016 to investigate in season potassium response in barley. The main objective was to compare Lokomotive, a liquid potassium product, to the more commonly used granular muriate of potash (MoP). Both soil and plant sample analysis showed the site to be marginal/deficient in potassium. Treatments were applied at GS 32. This timing was chosen as potassium deficiency is most commonly identified late in the growing season, when visual symptoms appear, and confidence in an economic response to applications of MoP in the current season is diminishing. At the time of application there were typical potassium leaf deficiency symptoms on the lower leaves.
Good growing conditions were experienced in Moora in 2016 and resulted in high barley yields of 4.17 to 4.39 t/ha. There was a small yield response (1.7% to 5.3%) from both Lokomotive and MoP however this was not significantly different to the untreated control. The small response to potassium in 2016 may be attributed to the wet spring conditions that would have made potassium in the soil more available to the crop. Further evaluation of in season potassium application is required when spring conditions aren’t as favorable as 2016.
|Lead research organisation||
|Host research organisation||
West Midlands Group
|Trial funding source||Landmark|
|Other trial partners||Not specified|
|Sow rate or Target density||70kg/ha|
Trial plot seeder KPPW
|Sow date||12 May 2016|
|Harvest date||Not specified|
|Plot size||1.8m x 18m|
Landmark MES10 80 kg/ha + Urea 80 kg/ha @ sowing. UAN 60 L/ha at tillering. (72N,14P,0K,8S)
Trifluralin 2L/ha + Boxer Gold 2.5 L/ha
Velocity 1 L/ha + Liberate 0.5% @ tillering
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.