An 'amaizing' season
It's been a bumper season for maize and other supplements in the eastern Bay of Plenty.
Many farmers are now facing hefty onfarm challenges. While the low milksolids payout is influencing cashflow and profitability, dry conditions are starting to limit pasture growth and milk flows in many key dairy regions.
There is no ideal ‘recipe’ for this autumn, but consider the following key management principles.
Feed out grass silage and summer crops first
After a reasonable spring, most farmers still have good quantities of supplementary feed on hand. Feeding silage and summer crops now not only keeps cows in milk but also protects pasture cover; this is increasingly important to ensure the persistence of modern pasture species. If you are feeding silage, always ensure you have at least 100kgDM/cow on hand to feed when it does rain.
Reduce demand onfarm by selling genuine culls
Most farms have about 10% genuine culls which will leave the farm before winter. These need to go now. For a 400-cow farm, culling 40 cows will release about 600kgDM – an extra 1.7kgDM – for every cow remaining.
This feed can be used to increase intakes and, hopefully, milk production.
With the meat schedule remaining high, culls are returning good prices at the works.
Protect pasture covers by feeding silages vs concentrates
Many pasture scientists acknowledge that summer over-grazing can reduce the productive life of pasture to the same degree as winter pugging. Ensuring pasture isn’t over-grazed protects the plant itself and keeps the plant in a better state to respond quickly to moisture once the rains come.
Cows eating silages (e.g. grass and maize silage) or summer forage crops (e.g. brassicas or forage sorghum) tend to leave behind more pasture than those eating concentrates (e.g. PKE, meal, and grain). Feeding grass silage and maize silage on a feed pad, standoff pad or sacrifice area enables farmers to drastically reduce the pressure on pastures, protecting cover levels and reducing pasture damage.
Keep cows in milk
Even in a low payout year, drying off milking cows too early doesn’t make sense (Table 1).Table 1 shows that even at a $4.50/kgMS payout, with cows producing as little as 0.7kgMS/cow/day, feeding maize silage (35c/kgDM eaten, 10.8 MJME/kgDM) generates a return of about $1.00/cow/day.
For a 400-cow herd it is worth about $400/day to keep cows in milk.
Watch body condition score (BCS)
Achieving BCS targets of 5.5 for your first and second calvers and 5.0 for the rest of the cows in the herd is highly profitable even at a $4.50/kgMS payout.
There is no better farm system feed than maize silage to enable you to do this because it will keep cows in milk while protecting body condition and pasture cover levels.
Careful and strategic management will ensure you make the most of a challenging autumn.
Tel. 0800 746 633
• Ian Williams is a Pioneer forage specialist. This email address is being protected from spambots. You need JavaScript enabled to view it.
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