Effects of postpartum fat supplementation and source on the reproductive performance of lactating young beef cows grazing cool-season grass pastures

2019 ◽  
Vol 35 (2) ◽  
pp. 185-198
Author(s):  
F. Añez-Osuna ◽  
G.B. Penner ◽  
J. Campbell ◽  
D. Damiran ◽  
M.E.R. Dugan ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Beef Cows ◽  
Cool Season ◽  
Fat Supplementation ◽  
Cool Season Grass

256 Effects of post-partum lipid supplementation and source of supplemental lipid on reproductive performance of lactating beef cows grazing cool-season grass pastures

2017 ◽  
Vol 95 (suppl_4) ◽  
pp. 126-126
Author(s):  
F. Añez-Osuna ◽  
G. B. Penner ◽  
J. Campbell ◽  
D. Damiran ◽  
P. G. Jefferson ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Post Partum ◽  
Beef Cows ◽  
Cool Season ◽  
Lipid Supplementation ◽  
Cool Season Grass

Forage-Based Heifer Development Program for North Florida

EDIS ◽  
2018 ◽  
Vol 2018 (5) ◽  
Author(s):  
Jose C.B. Dubeux ◽  
Nicolas DiLorenzo ◽  
Kalyn Waters ◽  
Jane C. Griffin
Keyword(s):  
Development Program ◽  
Warm Season ◽  
Beef Cows ◽  
Good News ◽  
Cool Season ◽  
Beef Industry ◽  
Performance Targets ◽  
Grazing Systems ◽  
Heifer Development ◽  
Reducing Costs

Florida has 915,000 beef cows and 125,000 replacement heifers (USDA, 2016). Developing these heifers so that they can become productive females in the cow herd is a tremendous investment in a cow/calf operation, an investment that takes several years to make a return. The good news is that there are options to develop heifers on forage-based programs with the possibility of reducing costs while simultaneously meeting performance targets required by the beef industry. Mild winters in Florida allows utilization of cool-season forages that can significantly enhance the performance of grazing heifers. During the warm-season, integration of forage legumes into grazing systems will provide additional nutrients to meet the performance required to develop a replacement heifer to become pregnant and enter the mature cow herd. In this document, we will propose a model for replacement heifer development, based on forage research performed in trials at the NFREC Marianna.   

PSXIII-2 Effect of varying proportions of cereal rye and turnip on ruminal fermentation and methane output through in vitro batch culture

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 461-461
Author(s):  
Jordan L Cox-O’Neill ◽  
Vivek Fellner ◽  
Alan J Franluebbers ◽  
Deidre D Harmon ◽  
Matt H Poore ◽  
...  
Keyword(s):  
Methane Production ◽  
Dry Matter ◽  
Ruminal Fermentation ◽  
Variable Response ◽  
Cool Season ◽  
Cereal Rye ◽  
Freeze Dried ◽  
Main Effect ◽  
Cool Season Grass

Abstract Ruminant animal performance has been variable in studies grazing annual cool-season grass and brassica monocultures and mixtures. There is little understanding of the fermentation mechanisms causing variation. The aim of this study was to determine apparent dry matter (DM) digestibility, methane, and volatile fatty acid (VFA) concentration from different proportions of cereal rye (Secale cereal; R) and turnip (Brassica rapa L.; T) (0R:100T, 40R:60T, 60R:40T, and 100R:0T) via in vitro batch fermentation. Freeze-dried forage samples from an integrated crop-livestock study was assembled into the four treatments with a 50:50 leaf to root ratio for turnip. Measurements were made following a 48 hr fermentation with 2:1 buffer and ruminal fluid inoculum. Data were analyzed using Mixed Procedure of SAS with batch (replicate) and treatment (main effect) in the model; differences were declared at P ≤ 0.05, with tendencies declared at > 0.05 but < 0.10. Rumen apparent DM digestibility (26.8%; overall mean) was not different among treatments. Methane production was less (P < 0.01) with inclusion of turnip ranging from 774 nmol/ml for 0R:100T to 1416 nmol/ml for 100R:0T. Total VFA production, acetate to propionate ratio, acetate, and valerate were not affected by forage treatments (117 mM, 1.45, 39.84 mol/100 mol, and 7.86 mol/100 mol, respectively; overall mean). Propionate, isobutyrate, and isovalerate concentrations were greater and butyrate concentration less with greater (P < 0.01) proportions of rye in the mixture. No effect of R:T ratio on digestibility or total VFA production along with the observed differences in individual VFA concentration do not explain variable response in grazing animals. Additionally, methane production results indicate that grazing turnips could potentially reduce methane production and thus reduce ruminant livestock’s contribution to greenhouse gas emissions.

Prepartum body condition and weight influences on reproductive performance of first-calf beef cows

1994 ◽  
Vol 72 (5) ◽  
pp. 1119-1125 ◽  
Author(s):  
S. M. DeRouen ◽  
D. E. Franke ◽  
D. G. Morrison ◽  
W. E. Wyatt ◽  
D. F. Coombs ◽  
...  
Keyword(s):  
Body Condition ◽  
Reproductive Performance ◽  
Beef Cows
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