Feeding value of frost-damaged soybeans for lambs

Article Abstract:

Feed with different contents of frost-damaged soybeans (FDS) were given to sheep to assess whether FDS can be used as ruminant feed. The results showed that FDS are similar to mature raw soybeans in terms of composition, fermentation effects and antinutritional constituents. However, the maximum practical inclusion rate of FDS is from 14% to 21% of the diet. Beyond these values, a precipitous decline in fiber and energy utilization is expected. Duration of storage time and consideration of anti-nutritional effects should be considered before using FDS as animal feed.

Research, Sheep, Soybean as feed, Soybean feeds

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Mineral deposits on Dacron bags during ruminal incubation

Article Abstract:

Prolonged ruminal incubation of Dacron bags showed accumulation of smooth aggregates of mineral contaminants, primarily hydroxylapatite and synthetic calcium magnesium phosphate. The appearance of the crystals indicated that the contamination was a gradual process, rather than the result of entrapment of dislodged crystals from ingested material. The rate of contamination increased exponentially with time. Contamination was higher in steers fed alfalfa hay as opposed to those fed orchardgrass.

Animal feeding and feeds, Cattle, Contamination

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Effect of asynchronous nitrogen and energy supply on growth of ruminal bacteria in batch culture

Article Abstract:

Batch cultures were supplied with nitrogen and energy sources to determine its effect on growth of ruminal bacteria. The variable rates of protein and carbohydrate metabolism produces an asynchronous supply of nitrogen and energy to ruminal microorganisms. It was shown however, that asynchronous supply of fixed amounts of nitrogen and energy produce no permanent effect on bacterial growth. Nitrogen deprivation was well tolerated and bacterial growth recovered quickly.

Physiological aspects, Microbiology, Cultures (Biology), Denitrification

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