The drop in corn prices in recent months represents a tremendous change in the feed cost environment for cattle producers. Corn and corn-derived feeds such as distiller’s grains and silage are much lower in price compared to recent history. Hay and roughage costs are lower as well, but on a percentage basis the price decline has not been as dramatic as compared to corn prices. Taking into account differences in energy concentration corn becomes a much cheaper source of energy than hay. Is there an opportunity to exploit these differences in feed prices to reduce winter feed expenses?
Three different rations for 1400 lb. cows in late gestation are shown in Table 1. Rations were formulated to meet protein requirements and maintain body condition. Ration #1 is a traditional hay based diet using alfalfa hay (19% CP) and grass hay (7% CP). Ration #2 is a limit-fed diet consisting of corn silage, grass hay, and modified distiller’s grains. Ration #3 is a limit-fed diet using grass hay combined with corn and modified distillers. Mineral content was not considered for the purposes of this illustration. The prices are based on published price data from SD feed markets in early October.
These examples illustrate that diets based on corn or corn-derived feeds are more cost effective in comparison to diets based completely on hay. Of course every situation is different and hay costs in some markets may not be as high as the values used here. It should be noted that the corn price is for dry corn (15% moisture). In some cases there may be an opportunity to utilize wetter corn for cattle diets, which would avoid drying charges and shrink resulting in reduced costs for corn growers that also feed cattle .There are also potential advantages in harvesting corn at higher moisture content due to greater flexibility in harvest timing and reduced risk of inclement weather causing harvest delays and losses.
Implementing some of these strategies requires limiting feed intake to match cattle nutrient requirements. In order to do that successfully, there are some management factors that need to be considered. Some of these include:
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