Managing micronutrient deficiencies in cropping systems. Manganese at Streaky Bay

2016

Research organisaton
Funding source

Trial details

Researcher(s) Nigel Wilhelm, Sjaan Davey
Year(s) 2016
Contributor South Australian Research and Development Institute
Trial location(s) Site 9, Streaky Bay, SA
Managing micronutrient deficiencies in cropping systems. Manganese at Streaky Bay locations
Aims

To asses the effect on crop yield of multiple rates and application strategies of micronutrient fertilizers in soils deficient in the target micronutrients (copper, zinc, manganese, boron and molybdenum)

Key messages

From this trial:

  • No crop response to the addition of Manganese. Plant tests not in the deficient range.

From the whole project:

  • Current guidelines are still relevant and effective for TE management.
  • Some current interpretations of soil tests are causing issues - the suggested levels to avoid deficiencies are much higher in some lab reports than is our experience from field trials. These are creating false impressions of the extent and severity of Zn and Cu deficiencies.
  • No evidence of a major increase in the incidence or severity of TE deficiencies in the cropping zones.
  • Fluid delivery of TEs at seeding is a valid management strategy but rates of the target TE need to be the same as used with compounded fertilisers.
  • Generally, all sources of foliar TE were equally effective.
Lead research organisation South Australian Research and Development Institute
Host research organisation N/A
Trial funding source GRDC DAS00146
Related program More Profit from Crop Nutrition
Acknowledgments

This project was linked closely with a similar project in WA project code DAW00239, managed by Dr Ross Brennan, DPIRD.


Other trial partners Not specified

Method

Crop type Barley
Treatment type(s)
  • Fertiliser
  • Fertiliser: Rate
  • Fertiliser: Timing
  • Fertiliser: Application
  • Fertiliser: Method
Trial type Experimental
Trial design Replicated

Streaky Bay 2016

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication 4
Fertiliser

District rates of basal fertilisers

 

Download results

Trial results Table 1

@T1: @T2:
# Treatment 1
Grain yield (t/ha) Tissue Manganese (mg Mn/kg) Tissue Manganese (mg Mn/kg)
1 Seed dressing (70g Mn/ha) 2.8 19.1 -
1 Granular fertiliser at seeding (3kg Mn/ha) 2.7 20.51 13.08
1 Fluid banded at seeding (0.45kg Mn / ha) 2.8 18.11 -
2 Fluid banded at seeding (0.75kg Mn / ha) 2.8 20.09 -
2 Fluid banded at seeding (1.5kg Mn/ ha) 2.7 20.28 -
2 Fluid banded at seeding (2.25kg Mn / ha) 2.8 20.27 -
3 Fluid banded at seeding (3.0kg Mn/ha) 2.7 20.94 13.3
3 Fluid banded at seeding (4.5kg Mn / ha) 2.9 18.66 -
3 Foliar spray chelate lignosulphonate (1.02kg Mn/ha) 2.9 - 12.65
4 Foliar spray chelate EDTA (1.02kg Mn/ha) 2.7 - 13.18
4 Foliar spray chelate amino acid (1.02kg Mn/ha) 2.7 - 13.35
4 Foliar spray sulphate (1.02kg Mn/ha) 2.8 - 13.08
5 Foliar spray sulphate (1.02 + 1.02kg Mn/ha) 2.8 - 12.08
5 Seed dressing + early foliar (Tmt1+12) 2.7 - -
5 Luxury management (Tmt1+2+8+12) 2.7 20.47 13.08
6 Nil Control 2.7 19.51 12.78
6 Nil Control: Residual A 2.9 18.96 -
6 Nil Control: Residual B 2.7 - -
7 Coated MAP product 2.6 18.34 -
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Grain yield t/ha


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Tissue Manganese mg Mn/kg


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Trial last modified: 09-10-2019 14:13pm AEST