Tropical Animal Health and Production

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ISSN / EISSN : 0049-4747 / 1573-7438
Published by: Springer Nature (10.1007)
Total articles ≅ 6,376
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Xiaoqi Wang, Xinyi Huang, Zhichao Zhang,
Tropical Animal Health and Production, Volume 54, pp 1-10; https://doi.org/10.1007/s11250-022-03186-8

Abstract:
The aim of this study was to verify that Caragana korshinskii Kom. (CK) as a component of sheep forage influences lamb digestibility and rumen fermentation by altering the rumen microbial community. Hence, 12 female Tan sheep were allocated into 2 groups: receiving (CK group) or not (control group) 10% of the diet forage fraction with CK. During the 60-day experiment, growth performance, apparent digestibility, rumen volatile fatty acids (VFAs), and nitrogen balance were measured. Meanwhile, the rumen bacterial community diversity and composition were detected by the 16S rRNA sequence. The results indicated that the apparent digestibility of acid detergent fibre (ADF) tended to be higher (0.05 < P < 0.10), and the feed conversion efficiency was improved (P < 0.05) when CK was offered. Compared to those under alfalfa, the composition and abundance of the rumen microbial community were altered in the CK group, and the phylum Firmicutes, which is involved in promoting fibre digestion, increased in abundance. Moreover, VFAs tended to decrease (0.05 < P < 0.10), and the molar proportion of butyrate declined; similarly, levels of hypoxanthine and xanthine were lower (P < 0.05) in the sheep fed CK and may have been responsible for the decreased abundance of Fibrobacter spp., which are cellulolytic ruminal bacteria associated with VFA production.
Muhammad Adeel Maqsood, Ehsaan Ullah Khan, Shafqat Nawaz Qaisrani, Muhammad Afzal Rashid, Muhammad Shabir Shaheen, Azhar Nazir, Hammad Talib,
Tropical Animal Health and Production, Volume 54, pp 1-10; https://doi.org/10.1007/s11250-022-03184-w

The publisher has not yet granted permission to display this abstract.
, Amani H. Amin, Ahmed E. Mahdy, Mahmoud A. Aziz, Adel S. A. El-Barbary, Dalia K. A. El-Hedainy
Tropical Animal Health and Production, Volume 54, pp 1-8; https://doi.org/10.1007/s11250-022-03182-y

Abstract:
Having a successful heifer raising operation is not only relevant financially, but also influential for the future of the dairy herds. Milk feeding has a significant role on the health and growth of calves before weaning, in addition to the direct progressive effects on future performance post-weaning. Therefore, the aim of this study was to compare the effects of constants amount of milk (CMS) versus step-up/step-down (SUSD) on calf performance in two different suckling schedules of suckling milk gradually till 9th weeks of calf age, then decreasing it till weaning. For this study, forty Holstein heifers calves utilized between birth and 8 months of age were randomly divided into four groups of 10 calves each. Grouping was performed according to suckling protocol (constant versus variable) and suckling schedule (2 versus 3 times/day). Each calf suckled 600 kg of milk in a suckling period of 120 days. Body weight (BW), in addition to five body measurements: chest girth (CG), height at wither (HW), height at rump (HR), body length (BL), and diagonal length (DL), were recorded weekly. The heaviest BW was observed on SUSD calves suckling twice/day which had also the highest HW at weaning. Similarly, were BW, HW, and CG at 6 months of age. Also, the same group achieved the largest daily BW (0.902 kg/day), BL (0.246 cm), and CG (0.338 cm/day) gains during the pre-weaning phase. However, CMS suckled 3 times/day calves had the largest daily BW gain between birth and 6 or 8 months of age. CMS twice/day calves had the largest daily gain in CG from weaning to 6 months and from weaning to 8 months of age followed by SUSD suckling 3 times/day calves. Also, CMS twice/day calves had the largest daily gain in rump height from birth to 8 months of age compared to other groups. It can be concluded that when equal amounts of milk were fed during the suckling period, suckling protocol affected growth rate before weaning but that effect diminished as calf age increased after weaning.
Ahmed M. Hussein, Hanan A. M. Hassanien, Magdy H. Abou El-Fadel, Youssef L. Phillip, Mohamed M. El-Badawy, Heba A. El-Sanafawy, Amany A. Khayyal,
Tropical Animal Health and Production, Volume 54, pp 1-9; https://doi.org/10.1007/s11250-022-03189-5

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, D. Srinivas Kumar, K. Raja Kishore, Ch. Venkata Seshaiah, D. Narendranath, P. Ravikanth Reddy
Tropical Animal Health and Production, Volume 54, pp 1-11; https://doi.org/10.1007/s11250-022-03187-7

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Felipe José Santos da Silva, Dorgival Morais De Lima Júnior, Ricardo Romão Guerra, Vitor Visintin Silva de Almeida, Julimar Do Sacramento Ribeiro, Beatriz Dantas Oliveira Fernandes, Anaiane Pereira Souza,
Tropical Animal Health and Production, Volume 54, pp 1-7; https://doi.org/10.1007/s11250-022-03160-4

The publisher has not yet granted permission to display this abstract.
, B. M. Ilori, O. S. Iyasere, O. G. George, O. A. Adewumi, P. A. Ojo, T. A. Yusuff, M. R. Adetifa, T. S. Atanda, M. O. Ozoje
Tropical Animal Health and Production, Volume 54, pp 1-10; https://doi.org/10.1007/s11250-022-03185-9

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