Abstract #859
Section: Ruminant Nutrition
Session: Ruminant Nutrition: Dairy rumen metabolism
Format: Oral
Day/Time: Thursday 10:45 AM–11:00 AM
Location: Panzacola F-2
Session: Ruminant Nutrition: Dairy rumen metabolism
Format: Oral
Day/Time: Thursday 10:45 AM–11:00 AM
Location: Panzacola F-2
# 859
Magnitude of difference in chemical and nutrient profiles, ruminal degradation kinetics, and intestinal digestion of three different types of co-products from bio-oil processing for dairy cattle.
Xinxin Li*1,2, Yonggen Zhang1, Peiqiang Yu1,2, 1College of Animal Science and Technology, Northeast Agricultural University, Harbin, China, 2Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
Key Words: soybean meal, rapeseed meal, degradation profile
Magnitude of difference in chemical and nutrient profiles, ruminal degradation kinetics, and intestinal digestion of three different types of co-products from bio-oil processing for dairy cattle.
Xinxin Li*1,2, Yonggen Zhang1, Peiqiang Yu1,2, 1College of Animal Science and Technology, Northeast Agricultural University, Harbin, China, 2Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
Co-products from bio-oil industry, rapeseed meal, canola meal and soybean meal, are good sources of feed protein for livestock. The objectives of this study were to determine the magnitude of differences among 3 types of co-products in terms of (1) protein nutrient profile, (2) protein subfractions associated rumen utilization, (3) protein rumen degradation kinetics and (4) intestinal absorbed true protein supply to dairy cattle. Rapeseed meal, canola meal and soybean meal were collected from 3 different sources in 2014. Crude protein was partitioned into 5 subfractions according to the Cornell net carbohydrate and protein system (CNCPS 6.5). Three lactating Holstein cows fitted with permanent rumen cannula were used for determining the protein rumen kinetics in the in situ trial. The estimation of intestinal rumen undegraded feed protein digestibility was determined using a modified 3-step in vitro procedure with 12 h pre-rumen incubation in lactating Holstein cows. In this study, statistical analyses were carried out using the PROC MIXED procedure of SAS 9.3. Significances were declared at P < 0.05. The results showed that CP content in soybean meal was higher than rapeseed meal and canola meal (P < 0.05). Rapeseed meal had the highest NPN content, followed by canola meal with NPN content lowest in soybean meal (P < 0.05). The contents of SCP, ADICP and NDICP in rapeseed meal and canola meal were higher than soybean meal (P < 0.05). Protein fractions of PA2, PB2 and PC were greater in rapeseed meal and canola meal than soybean meal (P < 0.05), but no significant difference was found between rapeseed meal and soybean meal. Both soybean meal and rapeseed meal had higher rumen degradable protein (RDP) than canola meal (P < 0.05). Soybean meal was greater than rapeseed meal and canola meal in intestinal digestible protein (IDP, P < 0.05). Total digestible protein (TDP) was highest in soybean meal, and lowest in canola meal (P < 0.05). Overall, the results indicated that soybean is a greater source of protein feed than canola meal and rapeseed meal.
Key Words: soybean meal, rapeseed meal, degradation profile
