Profit Tip: Forage Feeding Losses Can Add Up
A lot of long hours and expense are invested into harvesting quality forages and storing them for use at a later time. As a producer, you wouldn?t dream of throwing away one-third of the forages that were intended to be fed to the cow herd. Many times, that?s what happens when livestock are allowed unlimited access to hay in a feeding situation. Livestock trample, over consume, foul on, and use for bedding 25 to 45 percent of the hay when it is fed with no restrictions or is not processed. As forage feeding systems are incorporated into the feeding system to reduce feeding losses to the lowest possible, the financial commitment will increase. The key is to balance the financial outlay to implement a feeding system to reduce forage losses with the dollars saved in reducing the amount of forage needed. Many times this is dependent on the cost of the forage and, as the cost of the harvested forage increases, it appears easier to justify the cost of machinery and feeding devises.
Feeding Frequency and Amount
Hay loss and waste can be reduced by feeding hay daily according to diet needs. Compared to feeding a several-day supply each time hay is provided, daily feeding will force livestock to eat hay they might otherwise refuse, over consume, trample and waste. Cattle will waste less hay when the amount fed is limited to what is needed in a single day. One-fourth more hay is needed when a 4-day supply of hay is fed with free access than when a 1-day supply is fed.
Excessive hay consumption can be a major problem when large hay packages are fed without restriction. A dry, pregnant cow can eat up to 15 to 20 percent more hay than her needs when allowed free access to a good quality hay. A cow that is 1200 lb consuming 27 lb daily as is, with free access to the forage could consume 31 lb daily. This can amount to almost 500 pounds per cow over a 4-month feeding period for spring calving cows. A 100-cow herd may over consume 24 tons of hay if the cows have free access to hay. This is in addition to the extra needed to replace wasted hay when fed free access.
Devises To Reduce Forage Losses
Feeding losses when hay is fed daily in bunks can be kept in the 3% to 14% range. Well designed feeders (with solid bottom panels) will have losses in the 3% to 10% range for an average forage loss of about 6%. Large bales fed free choice without a rack or feeder in muddy conditions can result in forage losses exceeding 45%. Feed bunks are excellent for feeding small square bales. Round bales can be fed in specially designed racks. Loose or compressed hay stacks can have collapsible racks or electric wire around them to reduce trampling the hay around the edges. No matter how hay is fed, efforts that limit the amount of hay accessible to trampling will save feed. Feed hay at a well drained site and firm ground when possible. Hay racks or bale feeders with solid barriers at the bottom prevent livestock from pulling hay out to be stepped on. Some producers have fed forages on an up-slope with the hay next to an electric fence. Their observation is that, when the hay is spread in a long line so that all cows have access next to the electric fence, forage losses due to trampling are minimal.
The type of forage presented to the cattle can impact the amount lost during the feeding process. Allowing cattle free access to forages that have a thicker stalk or stem results in greater forages losses during feeding compared to thin stemmed forages like hays. When cattle are fed forages like sorghum-sudan hay and the feeding method and access are not controlled, they tend to select the leaves and upper parts of the stalk and not the lower part of the stalk resulting in greater feeding losses. When feeding method and amount that cows have access to is controlled, feeding losses are not much different among forage types.
Even if big-round-bale feeders are used to reduce forage feeding losses, there still can be substantial losses. There is not a lot of data on bale packaging quality on feeding losses. It appears loosely packaged bales fed in a bale feeder can result in high feeding losses. Cows pull the loose hay through the feeder and forage is deposited on the ground around the feeder.
Dry matter losses occur when handling hay from field to feeding. By the time the hay is fed, losses can be substantial, and can essentially increase the amount of production needed from the original standing crop by 35 percent. By effectively controlling the amount of hay lost and wasted during harvest, storage, and feeding, production costs can be reduced and hay making more profitable.
Grinding or Processing
There are some misconceptions that grinding forages will increase forages quality. This is not true. In some grinding situations, quality may decrease, especially if the hay is ground on a windy day. Grinding decrease particle size and when particle size is decreased, the amount of time that the ground forage needs to stay in the rumen to be digested decreases. A decrease in rumen retention time means that forage intake will increase. This means that a cow can consume more of the forage. This concept becomes important when feeding cows a low quality forage and intake is restricted because it will not pass through the rumen at a very rapid rate because it takes so long to digest. Grinding or processing hay in a bale processor is a method to increase consumption of low to medium quality forages. Grinding different forages together will allow to combine forages of differing quality for best use in a cow feeding diet. It also allows a way to manage problem forages such as forages that contain nitrate levels that are at the potentially toxic level.
Controlling forage feeding losses is important. It must also be recognized that as forage feeding losses move closer to zero, money will be invested on extra equipment or material such as bunks, feeding racks, inverted tires, etc. If the forage is ground, a feed wagon and/or loader on the tractor is needed. Costs need to be balanced with savings.
September 26, 2008
Dr. Rick Rasby, Professor of Animal Science
Animal Science, University of Nebraska - Lincoln, Lincoln, NE