Küçük Ölçekli İşletme Koşulları Altındaki Jersey İneklerinde İlk Üç Laktasyonda Üçyüzbeş Günlük Süt Verimi Üzerine Araştırmalar

Abstract

Düşük gelirli üretim sistemi koşulları altındaki küçük ölçekli aile işletmelerinde yetiştirilen 1476 Jersey ineğinden elde edilen 935 birinci 607 ikinci 432 üçüncü laktasyon kaydı yaş,buzağılama ayı faktörlerinin 305 günlük laktasyon verimi değişkenliğindeki etkilerini incelemek üzere analiz edilmiştir. Sabit faktörlü GML modeli ile yürütülen varyans analizi sonucunda bu faktörlerden buzağılama yaşının(CA),ilk (P<0.05), ikinci laktasyon üzerine (P<0.05);buzağılama ayının ilk laktasyon (P<0,001), ikinci laktasyon (P<0.01), üçüncü laktasyon (P<0.05) üzerine ve Sürü faktörünün (H): ilk ikinci üçüncü laktasyon üzerine etkili olduğu (P<0.001) anlaşılmıştır. Üçyüzbeş günlük süt verim miktarındaki ortalama büyüme ikinci laktasyonda birinci laktasyondan 198 kg daha fazla üçüncü laktasyonda ise ikinci laktasyona göre 271 kg daha fazladır.Farklı fizyolojik koşullardaki ineklerden elde edilen süt verim miktarlarını karşılaştırmayı mümkün kılmak bakımından 305 günlük süt verimlerinin buzağılama yaş ve ayı nın etkilerini azaltmak için düzeltilmesi gerekir.

Keywords

• süt üretimi
• Jersey sığırları
• küçük ölçekli işletme
• buzağalama
• yaş ve ayı

Study of 305- Day Milk Yield, for First Three Lactations, of Jersey Cows Under Conditions of Small Scale Family Farms

Abstract

Data of 935 first lactations, 607 second lactations and 432 third lactations obtained by 1476 Jersey cows that are managed in small scale family farms, under conditions of low input production system were analyzed in order to study effects of factors: age and month of calving on variance of 305-day milk yield. Analyze of variance carried out according to a GML with fixed factors showed statistical effects of these factors – age on calving (CA): first lactation (P<0.05), second lactation (P<0.05), month of calving (CS): first lactation (P<0,001), second lactation (P<0.01), third lactation (P<0.05) and herd (H): first, second and third lactations (P<0.001). Average growth of 305-day milk yield, in second lactation was 198 kg more than first lactation, and 271 kg more in third lactation compared to second lactation. To make possible the comparison of milk yield obtained by cows in different physiological conditions, it is necessary that 305-day milk yield be adjusted in order to reduce effects of calving age and month.

Keywords

• Milk production
• Jersey cattle
• small scale farms
• age and month of calving

References

1. Dervishi, V. 1991. “Etude de l`influence des facteurs non genetiques et genetiques sur la production laitiere des vaches Pie-Noire en Albanie“ D.E.A. Genetique quantitative et des population, Paris, France
2. Leroy P., Hanser R., Francois A. 1978. “Influence de certain facteurs non genetiques sur la production laitiere. II. Effet de l`age au premier velage et de la season de velage en race Pie-Noire de Havre“.Ann. Med.Vet. 122, 415-424.
3. Leroy P., Hanser R., Francois A. 1978 “Influence de certain facteurs non genetiques sur la production laitiere. III. L`effet de l`intervalle de velage sur la premiere Havre.“Ann. Med.Vet. 122, 425-433. race Pie-Noire de
4. Leroy P., Hanser R., Francois A. 1979. “Influence de certain facteurs non genetiques sur la production laitiere. IV. L`effet de lage ou velage et de la saison de velager sur la production lairiere et la teneur en matieres grasses et en proteine lors des trois premieres lactations en race Pie-Noire de Havre.“Ann. Med.Vet. 123, 405-420.
5. Leroy P., Hanser R., Francois A. 1980. “Influence de certain facteurs non genetiques sur la production laitiere. VI. Quelle importance donner au numero de lactation dans l`adjustement des productions lairieres pour l`age au velage en race Pie-Noire de Havre.“Ann. Med.Vet. 124, 289-302.
6. Kume K., Llukani M., Tafaj Rr. 1988. The effect of non genetic factors on milk production I. The effect of the age in first calving and the effect of the month of calving in milk production of “Black White” cattle breed . Bulletin of Animal Production Sciences and Veterinary Nr. 3, p. 33- 42.
7. Kume K. Dervishi V. 1988. The effect of non genetic factors on milk production II. Consideration on the method of correcting the effect of age in first calving and the effect of the month of calving in milk production of “Black White” cattle. Bulletin of Animal Production Science and Veterinary Nr. 4, p.51-60.
8. Kume K., Llukani M., Tafaj Rr. Dervishi V. 1989 The effect of non genetic factors on milk production III. Calving interval and milk production during first lactation in “Black White” cattle breed. Bulletin of Animal Production Science and Veterinary Nr. 1, p.27-33.

9. Kume K., Llukani M., Tafaj Rr. Dervishi V. 1989. The effect of non genetic factors on milk production IV. The effect of the age, the month of calving and number of lactation in milk production of “Black White” cattle breed. Bulletin of Animal Production Science and Veterinary Nr. 3, p.35-45.
10. Kume K., Llukani M., Tafaj Rr. 1990. The effect of non genetic factors on milk production V. Correction of milk production in 305 days in three first lactations due to effect of age on calving and calving month on “Black White” cattle breed. Bulletin of Animal Production Science and Veterinary Nr. 1, p.25-32,
11. Kume K., Tahiri F. 2003. Estimation of lactation curve parameters in Jersey cows. Bulletin of Agricultural Sciences, No. 2, p.15-22.
12. Miller P. D. 1970. “Joint influence of month and age of calving on milk of Holstein cows in the Northeastern U.S.” J. of Dairy Sci. vol. 53, p 359.