A process that improves the nutritional value of barley has been developed by scientists at the Agricultural Research Service’s Small Grains and Potato Germplasm Research Unit in Aberdeen, Idaho, and Montana Microbial Products LLC (MMP) in Missoula, Montana.
“Barley feed grain typically contains about 10-12 percent protein, but an ingredient needs to contain 40-60 percent protein for carnivorous fish like rainbow trout,” says ARS fish physiologist Rick Barrows, who is stationed in Bozeman, Montana. “An enzymatic process was developed to concentrate the protein in barley by removing the carbohydrates, which are then turned into an ethanol coproduct, thus utilizing all the nutrients in the grain. The barley protein is not exposed to high temperatures during concentration, so its digestibility is very high.”
Scientists tested the barley protein concentrate in rainbow trout to determine its palatability and digestibility—the percentage of nutrients available to the fish. “Protein digestibility and amino acid availability were in the mid-90-percent range,” Barrows says.
A process that improves the nutritional value of barley has been developed by scientists at the Agricultural Research Service’s Small Grains and Potato Germplasm Research Unit in Aberdeen, Idaho, and Montana Microbial Products LLC (MMP) in Missoula, Montana. “Barley feed grain typically contains about 10-12 percent protein, but an ingredient needs to contain 40-60 percent protein for carnivorous fish like rainbow trout,” says ARS fish physiologist Rick Barrows, who is stationed in Bozeman, Montana. “An enzymatic process was developed to concentrate the protein in barley by removing the carbohydrates, which are then turned into an ethanol coproduct, thus utilizing all the nutrients in the grain. The barley protein is not exposed to high temperatures during concentration, so its digestibility is very high.” Scientists tested the barley protein concentrate in rainbow trout to determine its palatability and digestibility—the percentage of nutrients available to the fish. “Protein digestibility and amino acid availability were in the mid-90-percent range,” Barrows says.
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