Effect of ewe prolificacy potential and stocking rate on ewe and lamb performance in a grass-based lamb production system

2017 ◽  
Vol 95 (1) ◽  
pp. 154 ◽  
Author(s):  
E. Earle ◽  
N. McHugh ◽  
T. M. Boland ◽  
P. Creighton
Keyword(s):  
Production System ◽  
Stocking Rate

scholarly journals Evaluation of nitrogen fertiliser in a beef production system

1990 ◽  
pp. 89-92
Author(s):  
S.T. Morris ◽  
A.F. Mcfrae
Keyword(s):  
Beef Cattle ◽  
Production System ◽  
Individual Animal ◽  
Stocking Rate ◽  
Beef Production ◽  
Pasture Production ◽  
Nitrogen Fertiliser ◽  
Stocking Rates ◽  
Objective Being ◽  
Clover Content

This paper reports and discusses the results of 4 years of trials (1985-1988) involving 2 farmlets, one receiving 3 nitrogen applications (50 kg /ha) in autumn, winter and spring (+N) and one receiving no N fertiliser (-N). Stocking rags were 3.3 animals/ha on -N farmlet and 4.3 animals/ha on the +N farmlet for the first 3 years, with the objective being to utilise the extra N-boosted grass with extra animals/ha but not to sacrifice individual animal performance. In the fourth year the stocking rates were kept the same on each farmlet (3.3 animals/ha) in an endeavour to utilise the extra grass grown on the +N farmlet by way of increased per head performance. In 2 of the 3 years (1985 and 1987) where the +N farmlet supported the higher stocking rate, liveweight gain (LWG) did not differ between animals. In 1986 the extra animals on the -l-N farmlet had a lower LWG, whereas in 1988 the LWGs were similar for the 2 farmlets stocked at the same rate. The apparent DM responses (kg DM/kg N applied) ranged from 2 to 12. The rates of N fertiliser used in this trial do not appear to result in economic increases in pasture production for the beef production system reported here. Nitrogen fertiliser did not reduce the clover content of pastures rotationally grazed by beef cattle. Keywords beef production, nitrogen fertiliser, pasture composition, livewieght gain, economics.

scholarly journals Effect of Stocking Rate on Growing Juvenile Sunshine Bass, Morone chrysops × M. saxatilis , in an Outdoor Biofloc Production System

2017 ◽  
Vol 49 (5) ◽  
pp. 827-836 ◽  
Author(s):  
Bartholomew W. Green ◽  
Steven D. Rawles ◽  
Carl D. Webster ◽  
Matthew E. McEntire
Keyword(s):  
Production System ◽  
Stocking Rate ◽  
Morone Chrysops ◽  
Sunshine Bass

scholarly journals Commercial beef farms excelling in terminal and maternal genetic merit generate more gross profit

2021 ◽  
Author(s):  
David N Kelly ◽  
K Connolly ◽  
P Kelly ◽  
A R Cromie ◽  
C P Murphy ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Financial Performance ◽  
Production System ◽  
Herd Size ◽  
Individual Animal ◽  
Stocking Rate ◽  
Genetic Merit ◽  
Herd Level ◽  
Net Profit ◽  
The Individual

Abstract Validation of beef total merit breeding indexes in improving performance and profitability has previously been undertaken at the individual animal level; however, no such herd-level validation of beef genetic merit and profit has been previously investigated. The objective of the present study was to quantify the relationship between herd profitability and both herd-average terminal and maternal genetic merit across 1,311 commercial Irish beef herds. Herd-level physical and financial performance data were available from a financial benchmarking tool used by Irish farmers and their extension advisors. Animal genetic merit data originated from the Irish Cattle Breeding Federation who undertake the national beef and dairy genetic evaluations. Herd-average genetic merit variables included the terminal index of young animals, the maternal index of dams, and the terminal index of service sires. The herds represented three production systems: 1) cow-calf to beef, 2) cow-calf to weanling/yearling, and 3) weanling/yearling to beef. Associations between herd financial performance metrics and herd average genetic merit variables were quantified using a series of linear mixed models with year, production system, herd size, stocking rate, concentrate input, and the two-way interactions between production system and herd size, stocking rate, and concentrate input included as nuisance factors. Herd nested within the county of Ireland (n=26) was included as a repeated effect. Herds with young cattle excelling in terminal index enjoyed greater gross and net profit per hectare (ha), per livestock unit (LU), and per kg net live-weight output. The change in gross profit per LU per unit change in the terminal index of young animals was €1.41 (SE = 0.23), while the respective regression coefficient for net profit per LU was €1.37 (SE=0.30); the standard deviation of the terminal index is €37. Herd-average dam maternal index and sire terminal index were both independently positively associated with gross profit per ha and gross profit per LU. Each one unit increase in dam maternal index (standard deviation of €38) was associated with a €1.40 (SE=0.48) and €0.76 (SE=0.29) greater gross profit per ha and per LU, respectively. Results from the present study at the herd-level concur with previous validation studies at the individual animal level thus instilling further confidence among stakeholders as to the expected improvement in herd profitability with improving genetic merit.

scholarly journals Determination of economic stocking rates for beef cattle grazing stargrass under two fertilizer levels

1969 ◽  
Vol 76 (3-4) ◽  
pp. 131-150
Author(s):  
Mariano Antoni ◽  
Rafael Ramos ◽  
Américo Casas ◽  
Eugenio Marrero
Keyword(s):  
Production System ◽  
Production Systems ◽  
Cattle Grazing ◽  
Meat Production ◽  
Selling Price ◽  
Stocking Rate ◽  
Economic Returns ◽  
Wide Range ◽  
Fertilizer System ◽  
Stocking Rates

Two meat production systems based on cattle grazing stargrass pastures under two fertilization levels were evaluated to determine which production system, stocking rate level, and selling time could be better used under different price scenarios to achieve maximum economic returns. Based on the findings of R. J. Jones and R. S. Sandland and other authors, it was assumed that the relationship between stocking rate and animal weight gain can be best represented by a simple linear model of the form y = a -bx over a wide range of stocking rates. To determine the equation parameters each system was grazed at three stocking rates and the straight line equation fitted at different periods. The price scenario prevailing at the conclusion of the study favored the utilization of the low fertilization system with a stocking rate close to 3.8 animals per hectare and selling the animals after 10 to 11 grazing months. This stocking rate should be lowered to 3.6 animals per hectare if a minimum finishing weight of 454 kg is required because of a 5% price discount for lighter animals. However, improvement on the price spread between animal purchase and selling price, or relatively sharp increase in meat price in relation to the fertilizer price could justify the utilization of the more capital intensive high fertilizer system. The selection of a particular production system and stocking rate should not be made independently of the current price levels since the latter will ultimately determine the success and failure of the system.

scholarly journals Prevalence and risk factors associated with anti-Toxoplasma gondii antibodies in sheep from Bahia state, Brazil

2013 ◽  
Vol 22 (2) ◽  
pp. 220-224 ◽  
Author(s):  
Luciana Afonso Guimarães ◽  
Rodrigo Alves Bezerra ◽  
Daniele de Santana Rocha ◽  
George Rêgo Albuquerque
Keyword(s):  
Risk Factors ◽  
Production System ◽  
Indirect Fluorescent Antibody Test ◽  
Fluorescent Antibody ◽  
Antibody Test ◽  
Water Source ◽  
Stocking Rate ◽  
Factors Associated ◽  
Fresh Food ◽  
System P

In this study, we aimed to determine the prevalence ofToxoplasma gondii antibodies and identify risk factors associated with this infection in sheep from the southern region of Bahia state. Between February and December 2010, 795 sheep from 31 farms located in nine municipalities were tested. We found seroprevalence of 30.2% (240/795), with titers of 64 (38.3%), 256 (34.2%), 1,024 (18.3%), and 4,096 (9.2%) by Indirect Fluorescent Antibody Test (IFAT). Seropositive sheep were detected in all farms sampled. Univariate statistical analysis detected association between T. gondii seropositivity and the variables age, use of fresh food mainly, water source, stocking rate, production system, presence and number of cats on the farm, and transit of cats (p < 0.05). In the logistic regression model, transit of cats (p = 0.001), production system (p = 0.007), and age (p = 0.027) were identified as risk factors associated with T. gondiiinfection.

scholarly journals The effect of stocking rate on soil solution nitrate concentrations beneath a free-draining dairy production system in Ireland

2015 ◽  
Vol 98 (6) ◽  
pp. 4211-4224 ◽  
Author(s):  
J. McCarthy ◽  
L. Delaby ◽  
D. Hennessy ◽  
B. McCarthy ◽  
W. Ryan ◽  
...  
Keyword(s):  
Soil Solution ◽  
Production System ◽  
Dairy Production ◽  
Stocking Rate ◽  
Nitrate Concentrations
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