Mingenew Irwin Group
Promoting and developing economic and environmentally sustainable agriculture
through research, planning, monitoring and demonstrating best practice.
Nested Cell Grazing - Trials
 
Overall Comments
 
Highlights in 2007
 

 Paddock

Area in ha

Stocking Rate DSE/ha

Stocking pressure/ha

Grazing days/ha/cycle

 1/32a

0.625

8

256

256

 1/32b

0.625

8

256

256

1/16

1.25

8

128

256

1/8

2.5

8

64

256

1/4

5

8

32

256

1/2

10

8

16

256

 Set Stocked

20

4

4

256

 * please note that the set stocked paddock was stocked at half the rotationally grazed paddocks
 
Rotational Grazing versus Set Stocking
-rotational grazing produced a higher amount of FOO at the end of teh rotations compared to set stocking even though it was stocked at twice the rate
-ground cover declined for both
-rotational grazing lost 32% and set stocking lost 15%
 
Highlights in 2008
 

 Paddock

Area in ha

Stocking Rate DSE/ha

Stocking pressure/ha

Grazing days/ha/cycle

 1/32a

0.625

6

192

192

 1/32b

0.625

6

192

192

1/16

1.25

6

96

192

1/8

2.5

6

48

192

1/4

5

6

24

192

1/2

10

6

12

192

 Set Stocked

20

6

6

192

 *please note that the set stocked paddock is stocked at the same rate as the rotationally grazed paddocks
 
Comparing Nested Cell Grazing Paddocks
- prior to winter grazing there was a higher grass density in the smaller more intensively grazed paddocks
- after the last winter rotation the smaller more intensively grazed paddocks still had the highest density of grasses but also lost the greatest munber of both grass plants and total plant numbers
-prior to the winter grazing the smaller more intensively grazed paddocks had a slightly higher FOO
-there were no conclusive results for FOO from grazing intensity at the end of the winter rotation
-prior to grazing the smaller more intensively grazed paddocks had a higher plant density
-after grazing the smaller more intensively grazed paddocks still had a better pasture density but they had also lost the most
 
Rotational Grazing versus Set Stocking
- rotational grazing produced a higher amount of FOO at the end of the trial than set stocking
-set stocking resulted in higher ground cover at the completion of the trial than rotational grazing though both had higher ground cover than prior to the winter grazings
-rye grass density fell in both the set stocking and rotational grazing with rotational grazing losing the least
-rotational grazing lost 75% of its brome and barley grass density with set stocking losing only 57% after the winter grazings

 

 

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