Application of double bottom rapeseed meal in ruminants (e.g. cattle)

Studies have shown that double low rapeseed meal can promote gastrointestinal development of piglets compared with soybean meal.

Application of double bottom rapeseed meal in ruminants:

Recent research shows that double low rapeseed meal can partially or completely replace most common protein feeds, such as soybean meal, cottonseed meal and brewer's grains, without affecting the production performance of cattle and sheep.

In some cases, it can improve the production performance and nitrogen utilization rate of dairy cows. Double low rapeseed meal significantly increased the milk yield of early lactating cows; The crude protein content of the whole mixed diet was 16%~18%, and no significant change was observed in lactation response. The feed efficiency of double bottomed rapeseed meal is often higher, and the urea nitrogen of milk is lower.

Based on in vitro and in vivo experiments, the substitution of double low rapeseed meal for soybean meal will not significantly change rumen fermentation, indicating that the advantages of double low rapeseed meal may be related to increased dry matter intake or better post rumen utilization efficiency, such as amino acid composition. It needs to be clarified that double low rapeseed meal has better production performance than soybean meal on ruminants. The reason may be that the difference of amino acid/essential amino acid donors is due to the amount of more rumen microbial protein flowing into the small intestine. Double low rapeseed meal can replace soybean meal, increase dry matter intake, milk yield and milk protein, and reduce rumen ammonia and urine nitrogen concentration.

The response of cattle and sheep to double low rapeseed meal also varied with the source of roughage. Double low rapeseed meal was better in the diet with alfalfa silage as the main source of roughage.

Feeding calf with this raw material has no obvious effect on its growth. This is because the soluble protein content in the double low rapeseed meal accounts for 20-25% of the total protein, the effective protein degradation rate is 60-70%, and the degradation rate in the rumen of cattle is 7-15%/h. Therefore, double low rapeseed meal can replace soybean meal or cotton meal as a separate protein supplement for dairy cattle feed or beef cattle feed. Double low rapeseed meal completely replaces the soybean meal in the calf starter feed, reducing the number of days of diarrhea for calves, and other growth performance is basically the same, but it has a slight impact on feed efficiency and nitrogen metabolism.