Managing micronutrient deficiencies in cropping systems. Zinc at Dandaloo

2016

Research organisatons
Funding source
South Australian Research and Development Institute D R Agriculture Pty Ltd

Trial details

Researcher(s) Nigel Wilhelm, Sjaan Davey
Year(s) 2016
Contributor South Australian Research and Development Institute
Trial location(s) Dandaloo, NSW
Managing micronutrient deficiencies in cropping systems. Zinc at Dandaloo 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 Zinc. Soil and plant tests were in the deficient range. As a foliar spray, sulphate was as effective as two chelate sources for increasing leaf zinc at Z30.

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 D R Agriculture Pty Ltd
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 Wheat
Treatment type(s)
  • Fertiliser
  • Fertiliser: Rate
  • Fertiliser: Timing
  • Fertiliser: Application
  • Fertiliser: Method
Trial type Experimental
Trial design Replicated

Dandaloo 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: Z14 @T2: Z30
# Treatment 1
Grain yield (kg/ha) Soil Zinc in top 10cm (mg DTPA Zn/kg) Tissue Zinc (mg Zn/kg) Tissue Zinc (mg Zn/kg)
1 Nil Control 7.2 1.75 11.1 14.26
1 Seed dressing (120g Zn/ha) 7.2 10.7775 -
1 Granular fertiliser at seeding (1kg Zn/ha) 7.2 12.725 13.615
2 Granular fertiliser at seeding (0.5kg Zn/ha) 7 11.775 -
2 Coated fert product (Zn = 0.5 kg/ha) 7.2 12.3 -
2 Fluid banded near seed row at seeding (1.0 Zn kg / ha) 7.3 11.75 -
3 Foliar spray sulphate (330g Zn/ha) 7.2 - 21.58
3 Foliar spray chelate gripper (330g Zn/ha) 7.1 - 16.745
3 Foliar spray chelate signature (330g Zn/ha) 7.2 - 22.4
4 Foliar spray chelate smartrace (330g Zn/ha) 7.2 - 21.195
4 Foliar spray sulphate x 2 (330 + 330g Zn/ha) 7.3 - -
4 Seed dressing + early foliar (120g Zn + 330g Zn/ha) 7.2 - 21.1475
5 Luxury management (Tmt 1+2+20+6) 7.1 12.025 21.7675
5 Nil Control: Residual A 6.8 12.375 13.8675
5 Nil Control: Residual B 7.2 - -
6 Fluid banded near seed row at seeding (0.13 Zn kg / ha) 7.2 12.55 -
6 Fluid banded near seed row at seeding (0.25 Zn kg / ha) 7 10.85 -
6 Fluid banded near seed row at seeding (0.5 Zn kg / ha) 7.2 10.95 -
7 Fluid banded near seed row at seeding (0.75 Zn kg / ha) 7.2 10.55 -
7 Fluid banded near seed row at seeding (1.5 Zn kg / ha) 7.3 12.2 12.545
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Grain yield kg/ha


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Soil Zinc in top 10cm mg DTPA Zn/kg


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Tissue Zinc mg Zn/kg


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Trial last modified: 09-10-2019 14:16pm AEST