The productivity estimation of female swamp buffalo population with different ages group in district Lumajang, East Java

Proper reproductive regulation could improve the level of productivity of livestock both in terms of production and reproduction. Swamp buffalo in Indonesia, especially in East Java, faces a severe problem, related to the sharp decline in population from year to year by 3%. However, buffaloes’ role is still sufficiently taken into account in the provision of employment in the fields of animal agriculture and national meat supply. This research aims to analyze the female productive age group swamp of buffalo ( Bubalus bubalis ) in district Lumajang. The research material was 154 buffalo farmer breeders with a total of 99 adult female buffaloes. This research method is the survey method, the data obtained, tabulated on average, deviation standard, and then analyzed descriptively. Variable observed structure different ages group, Service per Conception (S/C); Conception Rate (CR); Days Open. The results showed that the buffalo reproduction performance in district Lumajang was a total population of 99 adult females (60.74%) as many as 89 (89.9%) were of productive age average service per conception (2.68±0.89) times, NRR (9.99± 0.41) %. Length of pregnancy 10,57 ± 0,07 month, days open 3,82 ± 0.35 month, calving interval 16.39 + 0.42 month, conception rate (19.6±0.30) %. It was concluded that the reproductive performance of female productive swamp buffalo ( Bubalus bubalis ) in district Lumajang is potential for swamp buffalo breeding