scholarly journals Effects of grass feeding systems on ruminant meat colour and flavour. A review

2001 ◽  
Vol 50 (3) ◽  
pp. 185-200 ◽  
Author(s):  
Alessandro Priolo ◽  
Didier Micol ◽  
Jacques Agabriel
Keyword(s):  
Meat Colour ◽  
Ruminant Meat ◽  
Feeding Systems

Impact of calving seasons and feeding systems in western Canada. I. Postweaning growth performance and carcass characteristics of crossbred steers

2014 ◽  
Vol 94 (4) ◽  
pp. 571-582 ◽  
Author(s):  
Obioha N. Durunna ◽  
Hushton C. Block ◽  
Alan D. Iwaasa ◽  
Leanne C. Thompson ◽  
Shannon L. Scott ◽  
...  
Keyword(s):  
Growth Performance ◽  
Carcass Characteristics ◽  
Potential Effect ◽  
Western Canada ◽  
Ambient Temperatures ◽  
Beef Producers ◽  
Meat Colour ◽  
Meadow Bromegrass ◽  
The Impact ◽  
Feeding Systems

Durunna, O. N., Block, H. C., Iwaasa, A. D., Thompson, L. C., Scott, S. L., Robins, C., Khakbazan, M. and Lardner, H. A. 2014. Impact of calving seasons and feeding systems in western Canada. I. Postweaning growth performance and carcass characteristics of crossbred steers. Can. J. Anim. Sci. 94: 571–582. Crossbred steers (n=272) weaned from early (EC) and late (LC) calving systems (CS) were used to evaluate the impact of two feeding systems (FS) on postweaning performance and carcass characteristics. The steers were randomly assigned to either a rapid-gain feeding (RF) or a slow-gain feeding (SF) system. The RF steers were managed to have body weight (BW) gain of 1 kg d−1 on a silage-hay diet during the backgrounding period prior to finishing, while the SF steers were first backgrounded on a hay diet (gain of 0.7 kg d−1), then grazed alfalfa–meadow bromegrass pasture and annual cereal swaths prior to finishing. All treatment groups received a conventional diet during finishing until the steers attained a target backfat thickness or BW or both. There was no difference (P=0.48) between the two FS for the average age of the steers at the beginning of the experiment. There was a CS×FS effect (P<0.01) on the age at slaughter, where the steers in the EC-RF, EC-SF, LC-RF and LC-SF were 426, 659, 504 and 606 d, respectively. The longer time on feed for LC-RF steers compared with EC-RF suggests the potential effect of summer ambient temperatures at finishing. The EC-RF group had the least carcass fat thickness (P<0.01), but there was no main or interaction effect (P>0.08) on dressing percentage or lean meat yield. There was a FS effect (P<0.05) on meat colour and marbling texture where SF steers had more desirable meat colour and marbling texture. Beef producers adopting EC-RF would finish their calves earlier but at a lighter weight.

An experience of elaboration and implementation of systems of slag-forming mixtures mechanized feeding into CCM moulds

2020 ◽  
Vol 76 (10) ◽  
pp. 994-1003
Author(s):  
S. P. Eron’ko ◽  
M. Yu. Tkachev ◽  
E. V. Oshovskaya ◽  
B. I. Starodubtsev ◽  
S. V. Mechik
Keyword(s):  
Economic Effect ◽  
Three Dimensional ◽  
Movable Part ◽  
High Quality ◽  
Working Zone ◽  
Fine Material ◽  
Mixing Chamber ◽  
Field Samples ◽  
Technical Solutions ◽  
Feeding Systems

Effective application of slag-forming mixtures (SFM), being fed into continuous castingg machine (CCM) moulds, depends on their even distribution on the melt surface. Manual feeding of the SFM which is widely usedd does not provide this condition, resulting in the necessity to actualize the work to elaborate systems of SFM mechanized feedingg into moulds of various types CCM. A concept of the designing of a system of SFM feeding into CCM moulds presented with the ratte strictly correspondent to the casting speed and providing formation of an even layer of fine material of given thickness on the whoole surface of liquid steel. The proposed methods of designing of the SFM mechanized feeding systems based on three-dimensional computer simulation with the subsequent verification of the correctness of the adopted technical solutions on field samples. Informattion is presented on the design features of the adjusted facilities intended for continuous supply of finely granulated and powder mixtuures on metal mirror in moulds at the production of high-quality billets, blooms and slabs. Variants of mechanical and pneumo-mechaanical SFM supply elaborated. At the mechanical supply the fine material from the feeding hopper is moved at a adjusted distance bby a rigid horizontally located screw. At the pneumo-mechanical supply the metered doze of the granular mixture is delivered by a sshort vertical screw, the lower part of which is located in the mixing chamber attached from below to the hopper and equipped with ann ejector serving for pneumatic supply of the SFM in a stream of transporting gas. It was proposed to use flexible spiral screws in the ffuture facilities of mechanical SFM feeding. It will enable to eliminate the restrictions stipulated by the lack of free surface for locatiion of the facility in the working zone of the tundish, as well as to decrease significantly the mass of its movable part and to decreaase the necessary power of the carriage moving mechanism driver. The novelty of the proposed technical solutions is protected by thhree patents. The reduction of 10–15% in the consumption of slag-forming mixtures during the transition from manual to mechanizeed feeding confirmed. The resulting economic effect from the implementation of technical development enables to recoup the costs inncurred within 8–10 months.

Effects of full-time v. part-time grazing on seasonal changes in milk coagulation properties and fatty acid composition

2021 ◽  
pp. 1-6
Author(s):  
Franziska S. Akert ◽  
Michael Kreuzer ◽  
Carmen Kunz ◽  
Beat Reidy ◽  
Joel Berard
Keyword(s):  
Fatty Acid ◽  
Seasonal Variations ◽  
Milk Fat ◽  
Seasonal Effects ◽  
Full Time ◽  
Fa Composition ◽  
Part Time ◽  
Milk Coagulation ◽  
The Impact ◽  
Feeding Systems

Abstract For this research communication our objective was to investigate to what extent milk coagulation properties and milk fatty acid (FA) composition were affected by different feeding systems, season and their interaction. Eighteen cows in total were subjected to one of three different feeding system treatments: full-time grazing or part-time grazing combined with indoor feeding of fresh grass with low or high concentrate supplementation. Milk was sampled in spring, summer and autumn. Milk coagulation time was 15.0, 19.0 and 17.7 min, coagulation dynamics 1.67, 3.41 and 1.79 min, and curd firmness 52.7, 32.4 and 47.0 mm in spring, summer and autumn, respectively. Thus, milk coagulation properties of the milk were lower during summer. There were strong seasonal effects on milk FA proportions, but there were not always changes with progressing season, or changes were different with respect to the impact of the feeding systems (system × season interaction). The milk fat was favourably rich in oleic acid, conjugated linoleic acid and α-linolenic acid and had a low n-6/n-3 fatty acid ratio in all systems. Factors like seasonal variations in grass composition and the energy balance of the cows were considered relevant for the milk FA composition. Overall, seasonal variations in milk quality were less pronounced with part-time grazing with fresh grass indoors as compared to full-time grazing without concentrate.

Analysis of volatile molecules in Iberian dry-cured loins as affected by genetic, feeding systems and ingredients

2010 ◽  
Vol 231 (2) ◽  
pp. 225-235 ◽  
Author(s):  
Sonia Ventanas ◽  
Jesús Ventanas ◽  
Mario Estévez ◽  
Jorge Ruiz
Keyword(s):  
Feeding Systems

scholarly journals A performance model for mobile robot-based part feeding systems to supermarkets

2021 ◽  
Author(s):  
Emilio Moretti ◽  
Elena Tappia ◽  
Martina Mauri ◽  
Marco Melacini
Keyword(s):  
Negative Impact ◽  
Positive Impact ◽  
Waiting Times ◽  
Performance Model ◽  
Innovative Technology ◽  
Shop Floor ◽  
Storage And Retrieval ◽  
Trade Offs ◽  
Part Feeding ◽  
Feeding Systems

AbstractIn a context where companies are striving to produce highly customised goods in small batches and within short lead times, increasing attention is being put on the design and management of part feeding systems. This research is the first to model automated part feeding to supermarkets in a factory environment, considering an innovative technology called vertical robotic storage and retrieval systems. This technology allows automating the storage, picking, and internal transportation activities in an integrated process, thanks to rack-climbing robots roaming in both the shop floor and the storage racks. We develop an analytical model based on the queuing network approach to analyse the system performance, and we use it to perform numerical experiments and to evaluate the design trade-offs with reference to a real case in the automotive industry. Results show that an increase in the number of robots leads to better performance since the positive impact on the response time is stronger than the negative impact on the waiting times of robots at the supermarkets due to congestion. Furthermore, a configuration with multiple small supermarkets improves the efficiency of the replenishment process, compared to a setting with few big supermarkets.

scholarly journals Better Animal Feeding for Improving the Quality of Ruminant Meat and Dairy

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 1076
Author(s):  
Manuel Delgado-Pertíñez ◽  
Alberto Horcada
Keyword(s):  
Environmental Impact ◽  
Animal Welfare ◽  
Production System ◽  
Dairy Products ◽  
Sensory Characteristics ◽  
Ethical Aspects ◽  
Animal Feeding ◽  
Ruminant Meat ◽  
High Yields

The quality of meat and dairy products can be evaluated from the perspective of the farmer seeking high yields and profits or the consumer for whom sensory characteristics are the most important, although health and ethical aspects, such as animal welfare and the environmental impact of the production system, are increasingly becoming concerns worldwide [...]

Effects of conventional and grass-feeding systems on the nutrient composition of beef1

2008 ◽  
Vol 86 (12) ◽  
pp. 3575-3585 ◽  
Author(s):  
J. M. Leheska ◽  
L. D. Thompson ◽  
J. C. Howe ◽  
E. Hentges ◽  
J. Boyce ◽  
...  
Keyword(s):  
Nutrient Composition ◽  
Feeding Systems
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