A general cattle production systems model. Part 2—Procedures used for simulating animal performance

1979 ◽  
Vol 4 (4) ◽  
pp. 289-309 ◽  
Author(s):  
J.O. Sanders ◽  
T.C. Cartwright
2007 ◽  
Vol 2007 ◽  
pp. 236-236
Author(s):  
J. J. Hyslop ◽  
D. Fleming ◽  
G. J. Hill

Since de-coupling of CAP subsidy schemes from actual animal production, lowering the costs of finishing cattle production systems is one of the key challenges facing the beef industry. One of the largest costs associated with finished cattle production from spring-born suckled calves is the costs of over-wintering the weaned steer calf once the suckling phase is over. The capital tied up in buildings is a major component of these costs in countries such as the UK where the relatively harsh winter environments have traditionally led to many weaned suckled calves being housed and fed conserved forages over the winter months to ensure adequate performance. Previous work (Hyslop et al, 2006) has shown that under appropriate field conditions, non-lactating, spring calving suckler cows can be out-wintered on both grazed kale or turnip based-systems with an acceptable degree of animal performance. The objective of the current study was to determine liveweight (LW) changes in weaned spring-born suckled calf steers when managed outdoors on kale-based grazing systems during a short winter feeding period and to assess the dirtiness of steers hides at the end of the kale grazing period.


1979 ◽  
Vol 4 (3) ◽  
pp. 217-227 ◽  
Author(s):  
J.O. Sanders ◽  
T.C. Cartwright

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yannick Mugumaarhahama ◽  
Rodrigue Balthazar Basengere Ayagirwe ◽  
Valence Bwana Mutwedu ◽  
Nadège Cizungu Cirezi ◽  
Dieudonné Shukuru Wasso ◽  
...  

AbstractIn South-Kivu province, cattle farming is an integral component of farmers’ livelihoods and one of the few income-generating opportunities for smallholders. However, very few studies have been conducted to characterize smallholders’ cattle production systems. This study documents cattle production systems to better understand their current situation, constraints they face and opportunities they offer. For that purpose, an investigation was conducted based on a structured survey questionnaire and participatory interviews with 863 farmers in South-Kivu province. Collected data were analysed using factorial analysis of mixed data and clustering techniques. The results revealed three types of smallholder cattle farms differing mainly in their herds’ sizes and landholding. The first category is the most common and includes farmers raising small herds (6.3 ± 6.7 cattle) of local breeds in herding system (in this work, “herding system” refers to a rearing system for which the farmer drives and stays with his animals on pastures and fallow land during the day) and grazing fodder in community pastures, fallow lands and roadside grasses, while land constitutes a scarce resource. In the second category, some farmers have small tracts of land (< 5 ha) and others have large tracts (> 5 ha), but all have medium-size herds (45.1 ± 19.4 cattle) made up of local breeds, which they rear in herding system. They also exploit community pastures, fallow land and roadside fodder for animal feeding. The third and last category includes farmers with large cattle herds (78.1 ± 28.1 cattle) of local, crossbred and exotic breeds raised free range in the fenced paddocks on vast areas of land (> 5 ha) found in high-altitude regions. However, while being different according to the above-considered characteristics, the three categories of cattle farming remain extensive pastoral farms dominated by male farmers. Agriculture and/or animal husbandry are their main source of income while their livestock are also composed of goats and poultry, beside cattle. Still, the three farming groups require more inputs and improvement strategies for increased productivity in the challenging environment characterized by low land accessibility and high demand for milk and meat. Fodder cultivation and crop-livestock integration through agro-ecological systems as well as access to credit and extension services are the proposed strategies for the improvement of this economic sector.


2021 ◽  
Vol 194 ◽  
pp. 103247
Author(s):  
Maria Paula Cavuto Abrão Calvano ◽  
Ricardo Carneiro Brumatti ◽  
Jacqueline Cavalcante Barros ◽  
Marcos Valério Garcia ◽  
Kauê Rodriguez Martins ◽  
...  

2015 ◽  
Vol 47 (7) ◽  
pp. 1255-1260 ◽  
Author(s):  
Matheus Dhein Dill ◽  
Gabriel Ribas Pereira ◽  
João Batista Gonçalves Costa ◽  
Leonardo Canali Canellas ◽  
Vanessa Peripolli ◽  
...  

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 46-47
Author(s):  
Sarah C Klopatek ◽  
Toni Duarte ◽  
Crystal Yang ◽  
James W Oltjen

Abstract With demand for grass-fed beef continuing to increase, there is an immediate need to determine animal performance and product quality from varying grass-fed systems. Therefore, using a whole systems approach, we investigated the performance and carcass quality of multiple grass-fed beef systems in California. The treatments included: 1) steers stocked on pasture, then feedyard finished for 140 days (CON); 2) steers grass-fed for 20 months (20GF); 3) steers grass-fed for 20 months with a 45-day grain finish (GR45); and 4) steers grass-fed for 25 months (25GF). The data were analyzed using a mixed model procedure in R. Final body weight (FBW) varied significantly between treatments (P &lt; 0.05) with the CON cattle finishing at 626 kg and GF20 finishing with the lowest FBW of 478 kg. There were no significant differences in FBW between GF45 and GF25 treatments (P &gt; 0.05), with FBW equaling 551 kg and 570 kg, respectively. Dressing percentage (DP) differed significantly between all treatments (P &lt; 0.05), with CON DP at 61.8%, followed by GR45 at 57.5%, GF25 at 53.4%, and GF20 at 50.3%. Marbling scores and quality grades were significantly higher for CON compared to all other treatments (P &lt; 0.05), with a marbling score of 421; 14% of CON animals graded select and 85% graded choice or upper choice. Cattle in the GR20 had the lowest marbling score of 285 (P &lt; 0.05); 59% of the GR20 cattle graded select and 41% graded standard. There was no difference in marbling when comparing the GF25 and GR45 (P &gt; 0.5). In addition, carcasses graded similarly between the two treatments with GF25 grading 13% standard 82% select, and 6% choice, GR45 graded 85% select and 15% choice. The findings from this study indicate that varying CA grass-fed beef production systems results in significant differences in both animal performance and meat quality.


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