Silage

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silage

(sī`lĭj) or

ensilage

(ĕn`səlĭj), succulent, moist feed made by storing a green crop in a silosilo,
watertight and airtight structure for making and storing silage. Silos vary in form from a covered pit, such as was used by the early Romans, to the modern storage tower, dating from the 19th cent.
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. The crop most used for silage is corn; others are sorghum, sunflowers, legumes, and grass. In a sealed silo, typically in the past a tall cylindrical structure but often today in a surface pile covered tightly with heavy-gauge plastic, the crop ferments for about one month. This fermentation process, called ensiling, produces acids and consumes the oxygen in the silo, preserving the plant material. In pit ensiling, compacted silage ferments in an unsealed underground enclosure. Silage replaces or supplements hay for cattle, horses, and sheep. It is rich in carotene, an important source of vitamin A. A machine called an ensilage harvester cuts and chops the crop in one operation, preparing it for storage in the silo.

Bibliography

See publications of the U.S. Dept. of Agriculture.

Silage

 

a succulent feed preserved in an airtight container. Corn, potato, sunflower, vetch-and-oat, and other silages are distinguished. Silage is close in nutritive value to the green material that is ensiled. Carotene and vitamin C are preserved in silage, as are smaller quantities of water-soluble sugars. Organic acids are also present: lactic acid (up to 2 percent), acetic acid (up to 0.6 percent), and, in certain types of silage, propionic and valeric acids. When improper ensiling and storage procedures are employed, butyric acid may be present.

The feed value of silage depends on the ensiling method, on storage conditions, and on the type of plants used and their stage of development at harvesting. One hundred kg of sunflower silage contain approximately 16 feed units, 1.4 kg of digestible protein, 350 g of calcium, 160 g of phosphorus, and 1,500 mg of carotene. An equal amount of corn silage has approximately 20 feed units, 1.4 kg of digestible protein, 150 g of calcium, 50 g of phosphorus, and 1,500 mg of carotene. In 100 kg of alfalfa silage there are 18 feed units, 2.9 kg of digestible protein, 600 g of calcium, 60 g of phosphorus, and 2,500 mg of carotene.

Good silage is pale olive or yellowish in color; silage that has been exposed to a great deal of heat is dark brown. The odor of silage is reminiscent of sauerkraut or of soaked apples; it is sometimes fruity. When a great deal of warming has taken place, the odor resembles that of freshly baked bread or of honey. Spoiled silage smells like spoiled herring or manure. Silage must be crumbly in texture; an oily consistency indicates spoilage. With a moisture content of approximately 70 percent, the pH of good silage is 4.2. When the moisture content is 65 percent, the pH is somewhat higher.

The consumption of silage improves digestion and facilitates better utilization of other feeds, especially roughage. All farm animals are fed silage. Silage may constitute as much as 50 percent of the nutritive value in rations for dairy and beef cattle and as much as 20 percent in rations for swine. Special silage is prepared for calves, swine, and poultry. Silage for calves is prepared from legumes, soft cereals, and mixtures of legumes and cereals harvested during the early stages of development. For swine, combinations are used, consisting chiefly of sugar beets, carrots, potatoes, melons, and corn cobs. Silage for poultry consists of legumes, vitamin-rich gourds, carrots, beet tops, and sugar-beet roots. Silage is fed in the winter and, in arid regions, in the summer as well. In the USSR the total consumption of silage by cattle and poultry was 166.7 million tons in 1965 and 185.3 million tons in 1974.

S. IA. ZAFREN

silage

[′sī·lij]
(agriculture)
Green or mature fodder that is fermented to retard spoilage and produce a succulent winter feed for livestock.

Silage

Synchronous DSP specification language.

["Silage Reference Manual, Draft 1.0", D.R. Genin & P.N. Hilfinger, Silvar-Lisco, Leuven 1989].
References in periodicals archive ?
Chemical composition of ryegrass (Lolium multiflorum) at different stages of growth and ryegrass silages with additives.
Two dairy enterprises from Pembrokeshire topped the 2014-15 silage awards run by the Federation of Welsh Grassland Societies and the RWAS.
Clamps were depleted last winter/spring, so many farmers have been looking to make enough silage in order to build up stocks.
Table 1: Experimental silages Treatments Molasses% DM% 1 0 25 2 0 30 3 0 35 4 0 40 5 2 25 6 2 30 7 2 35 8 2 40 9 4 25 10 4 30 11 4 35 12 4 40 Table 2: The effects of treatments on the silage characteristics Treatments pH DM% 1 5.
Winner of the Clamp Silage title was John Parry, of Goitre Farm, Kerry, who impressed judges with his "remarkable" indoor feeding system.
The Silage Decisions initiative, based on a handy computer programme with accompanying fact sheets, allows users to examine the consequences of key grassland and conservation management decisions on grass silage yield, quality and overall cost.
One of the challenges that have faced producers using silage in their feed rations is spoilage.
The more common form of botulism is from spoiled silage.
Muck, the fermentation process protects the silage from spoilage by yeasts and molds, as long as the silos are sealed.
A FORMER winner of the Royal Welsh Agricultural Society's (RWAS) All-Wales Clamp Silage competition, John Parry of Goitre Farm, Kerry, Newtown, Powys, has carried off the first prize for a second time.
As well as being the most cost-effective way of conserving relatively light autumn grass crops, big bales also avoid the need to break existing clamp seals and risk compromising the quality of silages already made.