Photo AI
6. (a) (i) Construct the typical growth curve graph for the two-year 'calf-to-beef' production system - Leaving Cert Agricultural Science - Question 6 - 2012
Question 6
6. (a) (i) Construct the typical growth curve graph for the two-year 'calf-to-beef' production system. (ii) On your graph show clearly: 1. Target... show full transcript
Worked Solution & Example Answer:6. (a) (i) Construct the typical growth curve graph for the two-year 'calf-to-beef' production system - Leaving Cert Agricultural Science - Question 6 - 2012
Step 1
(i) Construct the typical growth curve graph for the two-year 'calf-to-beef' production system.
Answer
To construct the growth curve graph, start by drawing two axes. The x-axis will represent 'Time' (in years) and the y-axis will represent 'Weight' (in kg). Begin the graph by indicating the initial growth during the calf stage. The curve should rise steadily until it reaches the target weight of approximately 200 kg at the first winter housing. The curve should then flatten, representing a period of slower growth.
During the second winter, the graph should rise again, indicating that the weight reaches around 460 kg. Draw a segment to depict compensatory growth, which should be clearly indicated on the graph. Label these specific points on the growth curve.
Step 2
(ii) On your graph show clearly: 1. Target weights at first winter housing and second winter housing.
Answer
- The target weight at first winter housing is approximately 200 kg (with a range of 190-210 kg).
- The target weight at second winter housing is approximately 460 kg (with a range of 450-470 kg). These weights should be clearly marked on the graph.
Step 3
Step 4
(iii) Suggest a suitable diet for the beef cattle in the first and second winter.
Answer
For the first winter, a suitable diet would include high-quality silage and concentrates to ensure adequate protein and energy intake for the growing cattle.
For the second winter, it is important to continue providing a similar diet of good quality silage and concentrates to maintain weight gain and support health.
Step 5
(b) Suggest a suitable mastitis-prevention programme in a spring-calving dairy herd.
Answer
A suitable mastitis-prevention programme should include the following measures:
- Maintaining hygiene in the housing environment to minimize infections.
- Regularly washing udders and teats before milking to ensure cleanliness.
- Implementing proper milking machine maintenance to prevent any faulty operation.
- Treating infected cows promptly with antibiotics, and separating them from the healthy herd during recovery.
Step 6
(c) Outline the role of any one hormone in milk production in a lactating cow.
Answer
Oxytocin plays a crucial role in milk production in lactating cows. It is released from the pituitary gland and causes the muscles of the alveoli and milk-secreting tissue to contract. This contraction forces milk into the teats, facilitating the process of milk letdown during milking. Alternatively, Prolactin stimulates the production of milk in the mammary glands, supporting overall milk supply.