Slow growth has been the theme so far this year with many reseeding plans on the main grazing block have either been placed on hold or delayed.
However, its important once growth allows that we get back on track with replacing old swards to optimise production off the grazing platform. For many, mid-summer/early autumn reseed is the preferred option to reseed grazing ground due to reduced demand and the increased availability of grazing ground after second cut silage.
The target of 10% reseeded annually on the platform can be difficult to achieve when availability/growth is poor for a portion of the year, however, it is worth considering that in any year where the 10% target is not achieved, there is rarely the opportunity in the subsequent year to take out 15%-plus of the grazing block over one season.
Remember, an unproductive sward could be losing you 3t of Dry Matter/ha/year – with input prices where they are currently, swards with low percentages of perennial ryegrass not producing sufficient levels of grass in the shoulders of the year and have a poor response to N can’t be let linger into ‘the following year’.
Timing is critical – The earlier we plan on completing our reseed, the more flexibility we have regarding grazing and weed control. The target turnaround should be 50-60 days with a reseed. Post-emergence spraying is always your best chance to control weeds, typically applied approximately five to six weeks after sowing; and delaying reseeds into late autumn always increases risk of not getting post-emergence completed.
Creating a firm seedbed is all too often overlooked. You often see new plants emerging quickest where the tractor tyre marks are, or in the headlands due to the increased contact. This is a typically the first sign that the field has been inadequately rolled where moisture is adequate. Ensure the seed bed is firm – not fluffy – roll prior to sowing if necessary to firm up.
For more information, contact your local Agritech Sales Advisor or visit www.agritech.ie