Explorative study of blood urea nitrogen (BUN), serum estrogen, and conception rate (CR) in small-scale dairy farms based on quantity of feed concentrate consumed by the cattle
https://doi.org/10.21323/2414-438X-2025-10-2-156-163
Abstract
The purpose of this study was to measure the level of BUN in dairy cows and its influence on services per conception (S/C) rate, milk output, and the forage to concentrate (F/C) ratio.
Oestrogen concentrations were also assessed based on BUN level and pregnancy rate. Three blood samples were taken for the measurement of estrogen on the day of AI (D0), seven days later (D + 7), and twenty-two days later (D + 22). From the entire herd, a batch of eighteen dairy cows in total were chosen at random and split to the groups based on S/C, milk output, F/C ratio, BUN, and pregnancy rate. The means of BUN based on F/C ratio showed significant difference (p < 0.05) of the results. Each group’s estrogen concentration on D0 and D + 7 did not significantly differ (p>0.05) in regards to BUN and pregnancy rate, while the group of non-pregnant cows with high BUN featured lower value. However, in D + 22, the group of non-pregnant cows with high BUN showed a lower estrogen concentration than the group of pregnant cows with low BUN (p < 0.05), while the group of pregnant cows with low BUN had a higher BUN concentration than the group of non-pregnant cows with low BUN (p > 0.05). These results indicated that while feed could alter BUN concentrations, non-feeding factors should also be taken into account. S/C and milk yield were found to provide no effect on BUN concentrations. According to these findings, a higher BUN concentration decreased the CR value, and concentrations of BUN ≥ 18 mg/dL led to lower levels of estrogen.
About the Authors
S. MulyatiUniversitas Airlangga
Indonesia
Sri Mulyati, Ph.D., Lecturer
Faculty of Veterinary Medicine; Division of Veterinary Reproduction
60115; Jl. Dr. Ir. H. Soekarno, Kampus C Mulyorejo; East Java; Surabaya
Tel.: +62–811–3251–106
F. Aziz
Universitas Airlangga
Indonesia
Fachruddin Aziz, M. Sc., Student
Faculty of Veterinary Medicine; Master Program of Reproductive Biology
60115; Jl. Dr. Ir. H. Soekarno, Kampus C Mulyorejo; East Java; Surabaya
Tel.: +62–856–4003–1825
A. R. Khairullah
National Research and Innovation Agency (BRIN)
Indonesia
Aswin R. Khairullah, Ph.D., Researcher
Research Center for Veterinary Science
16911; Jl. Raya Bogor Km. 46 Cibinong; West Java; Bogor
Tel.: +62–814–5510–7656
I. Mustofa
Universitas Airlangga
Indonesia
Imam Mustofa, Professor, Lecturer
Faculty of Veterinary Medicine; Division of Veterinary Reproduction
60115; Jl. Dr. Ir. H. Soekarno, Kampus C Mulyorejo; East Java; Surabaya
Tel.: +62–812–3561–540
B. Utomo
Universitas Airlangga
Indonesia
Budi Utomo, Professor, Lecturer
Faculty of Veterinary Medicine; Division of Veterinary Reproduction
60115; Jl. Dr. Ir. H. Soekarno, Kampus C Mulyorejo; East Java; Surabaya
Tel.: +62–815–5316–0631
P. Srianto
Universitas Airlangga
Indonesia
Pudji Srianto, Professor, Lecturer
Faculty of Veterinary Medicine; Division of Veterinary Reproduction
60115; Jl. Dr. Ir. H. Soekarno, Kampus C Mulyorejo; East Java; Surabaya
T. W. Suprayogi
Universitas Airlangga
Indonesia
Tri W. Suprayogi, Professor, Lecturer
Faculty of Veterinary Medicine; Division of Veterinary Reproduction
60115; Jl. Dr. Ir. H. Soekarno, Kampus C Mulyorejo; East Java; Surabaya
Tel.: +62–813–3021–5592
S. Utama
Universitas Airlangga
Indonesia
Suzanita Utama, Ph.D., Lecturer
Faculty of Veterinary Medicine; Division of Veterinary Reproduction
60115; Jl. Dr. Ir. H. Soekarno, Kampus C Mulyorejo; East Java; Surabaya
W. Wurlina
Universitas Airlangga
Indonesia
Wurlina Wurlina, Professor, Lecturer
Faculty of Veterinary Medicine; Division of Veterinary Reproduction
60115; Jl. Dr. Ir. H. Soekarno, Kampus C Mulyorejo; East Java; Surabaya
Tel.: +62–812–3008–090
A. N. M. Ansori
Virtual Research Center for Bioinformatics and Biotechnology
Indonesia
Arif N. M. Ansori, Ph.D., Researcher
Uttaranchal University; Universitas Airlangga; Postgraduate School; Uttaranchal Institute of Pharmaceutical Sciences; Medical Biotechnology Research Group
60286; Kampus B Dharmawangsa, Jl. Airlangga 4–6; East Java; Surabaya; 248007; India; Chakrata Rd; Uttarakhand; Dehradun; 60493; Jl. Gunung Anyar Kidul No. 33; East Java; Surabaya
Tel.: +62–821–4464–7832
A. O. Akintunde
Babcock University
Nigeria
Adeyinka O. Akintunde, Ph.D., Lecturer
Department of Agriculture and Industrial Technology
121103; Ilishan-Remo
Tel.: +234–803–478–4244
Ch. D. Nugraha
National Research and Innovation Agency (BRIN)
Indonesia
Chairdin D. Nugraha, Ph.D., Researcher
Research Center for Animal Husbandry
16911; Jl. Raya Bogor Km. 46 Cibinong; West Java; Bogor
Tel.: +62–852–0456–3939
R. Z. Ahmad
National Research and Innovation Agency (BRIN)
Indonesia
Riza Z. Ahmad, Ph.D., Researcher
Research Center for Veterinary Science
16911; Jl. Raya Bogor Km. 46 Cibinong; West Java; Bogor
Tel.: +62–817–4922–649
L. Anggraini
National Research and Innovation Agency (BRIN)
Indonesia
Lili Anggraini, Ph.D., Researcher
Research Center for Veterinary Science
16911; Jl. Raya Bogor Km. 46 Cibinong; West Java; Bogor
Tel.: +62–852–7465–7948
L. Latifah
National Research and Innovation Agency (BRIN)
Indonesia
Latifah Latifah, Ph.D., Researcher
Research Center for Veterinary Science
16911; Jl. Raya Bogor Km. 46 Cibinong; West Java; Bogor
Tel.: +62–851–5923–6299
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Review
For citations:
Mulyati S., Aziz F., Khairullah A.R., Mustofa I., Utomo B., Srianto P., Suprayogi T.W., Utama S., Wurlina W., Ansori A.N., Akintunde A.O., Nugraha Ch.D., Ahmad R.Z., Anggraini L., Latifah L. Explorative study of blood urea nitrogen (BUN), serum estrogen, and conception rate (CR) in small-scale dairy farms based on quantity of feed concentrate consumed by the cattle. Theory and practice of meat processing. 2025;10(2):156-163. https://doi.org/10.21323/2414-438X-2025-10-2-156-163