1435 Lactation performance, in situ degradability, and rumen fermentation of Holstein cows fed BMR-6 sorghum silage versus corn silage based diets

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 696-696
Author(s):  
K. K. Gautam ◽  
S. J. Trojan ◽  
J. O. Sarturi ◽  
M. A. Ballou
Keyword(s):  
Rumen Fermentation ◽  
Corn Silage ◽  
Holstein Cows ◽  
Lactation Performance ◽  
Sorghum Silage

Effect of diet synchrony on rumen fermentation, production performance, immunity status and endocrine in Chinese Holstein cows

2019 ◽  
Vol 59 (4) ◽  
pp. 664 ◽  
Author(s):  
G. H. Qiao ◽  
Z. G. Xiao ◽  
Y. Li ◽  
G. J. Li ◽  
L. C. Zhao ◽  
...  
Keyword(s):  
Organic Matter ◽  
Nitrogen Concentration ◽  
Rumen Fermentation ◽  
Production Performance ◽  
Holstein Cows ◽  
Productive Performance ◽  
Chinese Holstein ◽  
Chinese Holstein Cows

In order to maximise utilisation of nutrients for ruminants, researchers directed the supply of nitrogen and organic matter synchronously to the rumen. In the current research, two experiments were conducted, one using the in situ nylon bag technique and the other using in vivo study. In Experiment 1, dynamic degradation rates of organic matter (OM) and nitrogen of each feedstuff were determined using the in situ nylon bag technique. Accordingly, three diets were formulated with the same chemical components, but differing in synchrony index (0.74, 0.85 and 0.97). Experiment 2 was subsequently carried out in vivo to evaluate the influence of diet synchrony on rumen fermentation, productive performance, immunity status and endocrine in Chinese Holstein cows. Rumen degradability of OM and neutral detergent fibre (NDF) and total tract digestibility of OM were linearly increased with the increase of synchrony index, respectively (P < 0.05). Total volatile fatty acids concentration of rumen fluid was increased linearly with the increase of synchrony index (P < 0.05). Meanwhile, rumen ammonia nitrogen concentration and blood urea nitrogen concentration were decreased in cows with the increase of synchrony index, (P < 0.05). Microbial crude protein production, the efficiency of microbial protein synthesis, and milk protein percentage, were linearly increased with the increase of synchrony index (P < 0.05). Serum concentrations of prostaglandin E2 and immunoreactive fibronectin-γ were linearly decreased with the increase of diet synchrony index (P < 0.05). The aforementioned results implicate that an increase of diet synchrony index could improve diet’s nitrogen utilisation, apparent digestibility of OM, and NDF. Additionally, it could promote rumen fermentation capacity, productive performance and immunity status in dairy cows.

Effects of corn treated with foliar fungicide on in situ corn silage degradability in Holstein cows

2016 ◽  
Vol 222 ◽  
pp. 149-157 ◽  
Author(s):  
K.J. Haerr ◽  
A. Pineda ◽  
N.M. Lopes ◽  
J.D. Weems ◽  
C.A. Bradley ◽  
...  
Keyword(s):  
Corn Silage ◽  
Holstein Cows ◽  
Foliar Fungicide

Effect of mechanical processing of corn silage on in vitro ruminal fermentation, and in situ bacterial colonization and dry matter degradation

2007 ◽  
Vol 87 (2) ◽  
pp. 259-267 ◽  
Author(s):  
K. Kozakai ◽  
T. Nakamura ◽  
Y. Kobayashi ◽  
T. Tanigawa ◽  
I. Osaka ◽  
...  
Keyword(s):  
Dry Matter ◽  
Bacterial Colonization ◽  
Rumen Fermentation ◽  
Corn Silage ◽  
Rumen Bacteria ◽  
Mechanical Processing ◽  
Copy Numbers ◽  
Rdna Copy

Rumen fermentation and bacterial colonization of mechanically processed corn silage were evaluated in a series of in vitro and in situ experiments using ruminally cannulated cows. Data from rumen-simulated continuous culture (Rusitec) showed that total VFA concentration was increased (P < 0.001) by feeding processed corn silage, while pH was reduced (P < 0.001) and ammonia nitrogen remained unchanged (P > 0.05). Mechanical processing enhanced the in situ rate and extent of dry matter disappearance for corn stems and kernels, respectively (P < 0.05). It also enhanced in situ, the initial attachment of rumen bacteria responsible for corn digestion, as monitored by real-time PCR. The16S rDNA copy numbers of amylolytic and lipolytic bacteria, such as Succinivibrio dextrinosolvens, Ruminobacter amylophilus and Anaerovibrio lipolytica, attached to corn kernels were increased for processed corn silage (P < 0.05), in particular at 2 h after the start of incubation. In addition, corn stemattached cellulolytic and hemicellulolytic bacteria, such as Fibrobacter succinogenes, ruminococci and Eubacterium ruminantium, increased in 16S rDNA copy numbers for processed corn silage (P < 0.05). This was observed for the initial incubation period from 10 min to 2 h. These results demonstrate more rapid attachment and heavier colonization of rumen bacteria to the processed compared with the unprocessed silage, which facilitates ruminal digestion and fermentation. Key words: Corn silage, mechanical processing, rumen fermentation, bacteria, attachment

Stage of maturity, processing, and hybrid effects on ruminal in situ disappearance of whole-plant corn silage

2000 ◽  
Vol 86 (1-2) ◽  
pp. 83-94 ◽  
Author(s):  
M.A Bal ◽  
R.D Shaver ◽  
K.J Shinners ◽  
J.G Coors ◽  
J.G Lauer ◽  
...  
Keyword(s):  
Corn Silage ◽  
Whole Plant
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