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The effect of grazing intensity on crops

2014

Research organisation
Funding source
Birchip Cropping Group
<abbr title='Grains Research and Development Corporation'>GRDC</abbr>

Trial details

Researcher(s) Alison Frischke (BCG)
Dannielle Ick (BCG)
Year(s) 2014
Contributor Birchip Cropping Group
Trial location(s) Quambatook, VIC
Further information View external link
The effect of grazing intensity on crops locations
Aims

To validate the effect of grazing intensity and growth stage on forage value and yield response of different wheat varieties, with sowing times suited to cultivar.

Key messages
  1. Grazing crops early and/or lightly will generally not affect grain yields.
  2. Plant recovery is supported by having more green material remaining after grazing; the more the merrier!
  3. Early sown winter wheat can produce more biomass earlier in the season than spring wheat varieties.
Lead research organisation Birchip Cropping Group
Host research organisation N/A
Trial funding source GRDC SFS00028
Related program Grain & Graze 3
Acknowledgments

This research was funded through GRDC‘s ‘Grain & Graze 3’ project (SFS00028).
Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Grazing : Application Method
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Quambatook 2014

Sow rate or Target density 150 plants/m²
Sowing machinery

Knife points, press wheels, 30cm row spacing
Sow date 1 April 2014 1 April 2014 (TOS 1) and 6 May 2014 (TOS 2)
Harvest date 14 November 2014 14 November 2014 (TOS 1) and 1 December 2014 (TOS 2)
Plot size Not specified
Plot replication Not specified
Fertiliser

Granulock supreme Z @ 50kg/ha at sowing plus 180kg/ha of urea (83 kg N/ha) top-dressed in two separate applications
 
Herbicide

Weeds were controlled to be management practices.
Insecticide

Pests were controlled to best management practices.
Fungicide

Diseases were controlled to best management practice.
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

@T1: @T2:
# Variety
 Treatment 1
Treatment 2
Protein (%) Screenings (%) Grain yield (t/ha) Crude protein (% of DM) Neutral detergent fibre (% of DM) Metabolisable energy (MJ/kg DM) Total dry sheep equivalent grazing days (day) Plant height (cm) Dry matter (t/ha) Dry matter (t/ha)
1 █ Rosella █ Ungrazed █ 15.5 3.5 0.7 6.4
1 █ Rosella █ Early GS16 █ Moderate 15.2 3.6 0.76 31.9 38.9 12 550 0.37 5.8
2 █ Rosella █ Early GS16 █ Heavy 14.9 3.9 0.83 30.7 34.4 12.1 1098 0.73 5.75
2 █ Rosella █ Late GS30 █ Light 14.9 3.8 0.83 25.1 44.4 11.4 528 0.38 5.21
2 █ Rosella █ Late GS30 █ Moderate 14.5 3.3 0.86 22.3 43.2 11.2 1014 0.71 5.18
3 █ Rosella █ Late GS30 █ Heavy 14.4 3.6 0.89 20.6 48 10.6 2082 1.57 4.23
3 █ Rosella █ Ungrazed █ 12.9 5.8 1.58 5.75
3 █ Rosella █ Early GS16 █ Moderate 12.4 5.1 1.5 27.6 42.4 12 440 15 0.28 5.84
4 █ Rosella █ Early GS16 █ Heavy 12.2 5.8 1.35 31.6 36.7 12.6 949 10 0.63 4.53
4 █ Rosella █ Late GS30 █ Light 12.5 7.2 1.29 30.3 35.6 12.4 375 25 0.24 5.72
4 █ Rosella █ Late GS30 █ Moderate 12.4 8.2 1.19 29.2 37.6 11.8 810 15 0.55 4.56
5 █ Rosella █ Late GS30 █ Heavy 12.7 11.1 1.05 22.4 42.7 11.3 1603 10 1.14 3.87
5 █ Rosella █ Ungrazed █ 11.5 3.5 2.21 6.3
5 █ Rosella █ Early GS16 █ Moderate 11 3.6 2.07 749 15 0.49 5.05
6 █ Rosella █ Late GS30 █ Moderate 11.7 4.9 2.02 620 15 0.42 5.48
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Grain yield t/ha

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Crude protein % of DM

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Dry matter t/ha

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Metabolisable energy MJ/kg DM

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Neutral detergent fibre % of DM

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Plant height cm

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Protein %

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Screenings %

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Total dry sheep equivalent grazing days day

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Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
Quambatook, VIC 0 - 10cm Clay loam 6.80 32.00 1.20
Quambatook, VIC 0 - 100cm Clay loam 55.00
Soil conditions
Trial site Soil texture
Quambatook, VIC Clay loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Quambatook, VIC Sodosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Quambatook VIC
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Climate

Quambatook VIC 2014

Observed climate information

Rainfall trial total (mm) 239mm
Rainfall trial gsr (mm) 168mm

Derived climate information

Quambatook VIC

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Some data on this site is sourced from the Bureau of Meteorology

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.

Trial report and links

2014 trial report