scholarly journals In Situ Digestion Kinetics and Ruminal Turnover Rates of Normal and Brown Midrib Mutant Sorghum × Sudangrass Hays Fed to Nonlactating Holstein Cows

1988 ◽  
Vol 71 (12) ◽  
pp. 3345-3351 ◽  
Author(s):  
J.O. Fritz ◽  
K.J. Moore ◽  
E.H. Jaster
Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1713
Author(s):  
Muhammad Awais ◽  
Muhammad Sharif ◽  
Khurram Ashfaq ◽  
Amjad Islam Aqib ◽  
Muhammad Saeed ◽  
...  

A study was carried out to evaluate the effect of single cell protein (SCP) supplement as a protein source on nutrient intake, digestibility, nitrogen balance and in situ digestion kinetics in four Nili Ravi buffalo bulls. Four iso-caloric and iso-nitrogenous concentrates containing 3, 6, 9 and 12% of Saccharomyces cerevisiae-fermented citrus pulp were formulated. All animals were fed a ration with a concentrate/forage ratio of 50:50. Diets were provided ad libitum twice a day as a total mixed ration in a 4 × 4 Latin Square Design. Each experimental period lasted 3 weeks while the overall study 12 weeks. The first 2 weeks of each experimental period were used as adaptation period while the third week as collection period. Chemical composition of fermented citrus pulp appeared as an excellent source of protein. No significant difference was observed on dry matter intake, digestibility of nutrients and SCP among all the treatments. Moreover, no significant effect was observed on ruminal pH and ammonia nitrogen at different times. Rate of disappearance and lag time of in situ dry matter digestion kinetics remained nonsignificant regardless of SCP percentage. Based on results of similar nutrients intake, nutrient digestibility, and ruminal parameters it is concluded that SCP could be used in the concentrate diet of ruminant up to 12%. Furthermore, the SCP has the potential of an alternative protein source in animal diet formulation.


Author(s):  
J.R. Newbold ◽  
B.R. Cottrill ◽  
R.M. Mansbridge ◽  
J.S. Blake

Few data are available to evaluate the Metabolisable Protein (MP) System (AFRC, 1992) as an aid to ration formulation for dairy cows. Responses of lactating dairy cows to MP were evaluated in two experiments.In Experiment One, groups of 10 Holstein cows were offered grass silage ad libitum and 7kg DM/d of one of six (treatments 1-6) compound foods from 39d after calving, for eight weeks. All rations were isoenergetic, assuming silage intake of 11kg DM/d (typical for the herd). Ratios between MP supply (calculated from in situ protein degradability measurements) and requirement (calculated for a standard cow: 565kg live weight, 281 milk/d, 40g/kg butterfat, 33g/kg milk protein, liveweight change =0kg/d) were 1.00, 1.02, 1.06, 1.06, 1.1 and 1.17 for treatments 1-6, respectively.


2007 ◽  
Vol 99 (5) ◽  
pp. 1345-1351 ◽  
Author(s):  
Quirine M. Ketterings ◽  
Jerry H. Cherney ◽  
Greg Godwin ◽  
Tom F. Kilcer ◽  
Peter Barney ◽  
...  

2000 ◽  
Vol 80 (1) ◽  
pp. 215-219 ◽  
Author(s):  
Marina A. G. von Keyserlingk ◽  
E. Weurding ◽  
Mary Lou Swift ◽  
C. F. Wright ◽  
J. A. Shelford ◽  
...  

The effect of adding 5% calcium lignosulfonate (LSO3) and heat to canola screenings on in situ ruminal and intestinal dry matter (DM) and crude protein (CP) disappearance in Holstein cows was investigated. Treatments consisted of untreated canola screenings, canola screenings that had been heated to 100 °C for 30 or 60 min and canola screenings that had 5% (wt wt−1) LSO3 added and were subsequently heated at 100 °C for 0, 30 or 60 min. Results indicate that treatment of canola screenings with 5% LSO3 and heated to 100 °C for 60 min was effective in reducing rumen degradation of DM and CP with a corresponding increase in disappearance in the lower gastrointestinal tract when compared to untreated and heat-treated canola screenings. Key words: Canola screenings, rumen by-pass protein, heat treatment, lignosulfonate


1998 ◽  
Vol 11 (2) ◽  
pp. 128-132 ◽  
Author(s):  
M. Sarwar ◽  
Mahr-un-Nisa ◽  
S. A. Bhatti ◽  
C. S. Ali

Sign in / Sign up

Export Citation Format

Share Document