Increased drymatter performance

With superior resistance against insects including giving a stronger root system, ryegrass with AR37 is able to produce higher levels of drymatter than the same ryegrass varieties with AR1 or standard endophyte.

On average it has 12% higher drymatter production nationally than the same cultivar with standard endophyte. The increase in drymatter is much higher across the key summer and autumn seasons (when pastures are under the most insect pressure).

Ryegrasses with AR37 show improved persistence, with higher tiller densities over time when compared to the same cultivars with nil endophyte or standard endophyte. With higher persistence the need to renew pasture due to poor pasture composition may be reduced, which is a potential benefit. The resulting higher producing sward also has long-term benefits in assisting the maintenance of excellent animal performance.

The drymatter benefits of ryegrasses with AR37 are higher in areas with greater stress and/or insect pressure - for example trials in Northland showed an average 21% higher drymatter production than the same cultivar with standard endophyte. There have been 11 AgResearch trials completed in New Zealand since 1996, in four regions. The regional averages of 5-21% give a national average of 12%.

Overview

Select a trial region to view.

Northland
 

Northland

Northland showed the largest increase in drymatter production regionally with a 21% increase in drymatter production using ryegrass with AR37 compared to the same cultivar with standard endophyte. In comparison to AR1, it produced 15% more drymatter.

Waikato & Bay of Plenty
 

Waikato & Bay of Plenty

Waikato and Bay of Plenty showed substantial improvement with a 15% increase in drymatter production using ryegrass with AR37 compared to the same cultivar with standard endophyte. In comparison to ryegrass with AR1 it had even better results, producing 22% more drymatter.

Manawatu
 

Manawatu

Manawatu is recognised as an area with lower pest pressure, but trials still showed an increase in drymatter production by 5% from using ryegrass with AR37 compared to the same cultivar with standard endophyte. In comparison to ryegrass with AR1, it had even better results producing 8% more drymatter.

Canterbury
 

Canterbury

Trials at Lincoln showed an 8% increase in drymatter production using ryegrass with AR37 compared to the same cultivar with standard endophyte. This area has lower insect infestations than other regions, so this is still a considerable increase in drymatter production.

 

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