France: Replacing soybean meal with faba bean, lupin, or pea seeds has highly variable effects on dairy performance
Soybean Meal
Dairy
Published Dec 9, 2020
Tridge summary
The use of raw proteaginous seeds (PS) such as faba bean, lupin or pea in dairy cow rations increases ruminal nitrogen degradability compared to soybean meal (SBM), according to a new meta-analysis from a French team of researchers. Processing treatments could enhance the nutritive value of such seeds, they said. But more details are needed about the various treatments available to understand their effects in vivo.
Original content
Replacing SBM by PS in dairy cow diets has been studied for many years, they noted in a paper published in the journal, Animal Feed Science and Technology. Compared to soybean meal, PS contain less crude protein (CP). In addition, proteins of raw PS are more degradable in the rumen, decreasing their nutritive value for ruminants. To counteract this, heat-treatments of PS have been developed to reduce the rumen degradability of PS proteins and thus to improve their nutritive value, noted the animal scientists. The objective of their study was to quantify the effects on nitrogen metabolism and dairy performance of substituting SBM for PS or replacing raw with treated PS in dairy cow diets, focusing on three types of PS: faba bean, lupin and pea. Two databases were created, which gathered information on in vivo and in situ results, respectively, they said. “Our first hypothesis was that raw seeds, compared to SBM, would lead to higher ruminal degradation of proteins and lower ...
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