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The economic importance of reproductive performance

, : The economic importance of reproductive performance. Producteur de Lait Quebecois 13(3): 30-32

Reproductive performance of dairy cows is assessed on the basis of calving-conception interval, calving interval, conception rate and rate of detection of oestrus. Models were developed using hypothetical dairy herds to correlate reproductive performance with annual milk yield, lactation curves, calf production, insemination costs and replacement rates.


Other references

Choi, Yung Hyun; Park, Kun Young; Lee, Seon Mi; Yoo, M.A.; Lee, Won Ho, 1995: Inhibitory effect of the fresh juice of kale on the genotoxicity of aflatoxin B-1. The inhibitory effect of the fresh juice of kale on the genotoxicity induced by aflatoxin B-1 (AFB-1) in Salmonella and Drosophila was investigated. The kale juice had strong inhibitory activity for His- to His+ reverse-mutations induced by AFB-1...

Christiansson, A.; Magnusson, M.; Nilsson, J.; Ekelund, K.; Samuelson, O., 1997: The occurrence of Bacillus cereus spores in bulk tank milk during the indoor winter season. In a series of trials during 1994-96, B. cereus spore contents were determined in bulk tank milk and in bedding materials, air, feeds, drinking water, manure and rinse-water from cleaned milking equipment. At the Alnarp Experimental Farm, Sweden,...

Gharbi, A.; Ousehal, A.; Kissani, N.; Lakhdar, A.; Azhari, A.; Kadiri, R., 2001: Hemangiopericytome sellaire. A propos d'un cas. Authors report spontaneous necrosis of a sellar hemangiopericytoma, in a 44 year old man, revealed by a right cavernous syndrome. The initial CT scan showed a right sellar and parasellar spontaneous hyperdense process, intensely and homogenously e...

Keane, M.C., 1973: Presidential address: The professional status of the nurse in the nineteen eighties. World of Irish Nursing 2(11): 199-203

Duerr, R.L.; Huang, S.; Miraliakbar, H.R.; Clark, R.; Chien, K.R.; Ross, J., 1995: Insulin-like growth factor-1 enhances ventricular hypertrophy and function during the onset of experimental cardiac failure. To determine whether additional hypertrophy would be beneficial or maladaptive in cardiac failure, the effects of insulin-like growth factor (IGF-1) were investigated in rats with left ventricular (LV) dysfunction. In normal rats, 3 mg/kg per d of...

J.B.Harborne, 1963: Plant polyphenols X Flavone and aurone glycosides of Antirrhinum. Five flavones present in flowers of Antirrhinum majus have been identified, namely: apigenin 7,4-diglucuronide, luteolin 7-glucuronide, chrysoeriol 7-glucuronide, kampferol 3-glucoside and kampferol 3,7-diglucoside. A new aurone, bracteatin 6-gluc...

Yang, Y-Quan.; Chen, X-Kuan.; Xiao, H.; Liu, W.; Zhao, G., 2010: Organocatalyzed enantioselective Michael additions of nitroalkanes to enones by using primary-secondary diamine catalysts. Primary-secondary diamines perform as efficient organocatalysts for the asymmetric addition of nitroalkanes to enones, giving the Michael adducts with excellent yields and enantioselectivities.

Heffernan, J.P.; Huisman, T.K., 1994: Nephrogenic adenoma in a bladder diverticulum. Nephrogenic adenoma is a rare proliferative response of urothelium to chronic irritation or infection. It has been reported to occur in various locations in the urinary tract, including the renal pelvis, ureter, bladder and urethra, and within an...

Anonymous, 1995: Hand in hand. This booklet was developed in order to help build positive relationships between food service staff and teachers. Offers ideas for teaching nutrition concepts and promoting the school food service to elementary and middle school children.

Mcmahon F.J.; Moran T.H.; Robinson R.G., 1986: Hyperactivity after cortical injury is independent of cerebral lateralization and nigrostriatal dopamine system. Society for Neuroscience Abstracts 12(1): 722