University of Sumatera Utara Indonesia
Yusuf Leonard Henuk is a Professor in the Department of Animal Science, Faculty of Agriculture at the University of Sumatera Utara (USU), Medan, North Sumatera, Indonesia. He participated in the courses of Arabic Language and mainly Poultry Production and Health from 15 January 31 March 2008 organized by the Egyptian International Centre for Agriculture (EICA), Cairo, Egypt. He was a twice Visiting Professor at the Department of Poultry Science, Texas A&M University, College Station, USA (September December 2010& 2017). He was a prolific writer and has published many articles in international journals and mainly in poultry science, e.g. World Poultry Science Journal as well as international scientific meetings such as 3rd World Plant Genomics and Plant Science Congress Keynote Speaker July 15 16, Osaka, Japan; 15th Annual Conference on Crop Science and Agriculture Keynote Speaker 18-19 November 2019, Bali, Indonesia.
The objective of this study was to investigate the reproductive and morphological performances of stallions in the District of Karo, North Sumatera, Indonesia. Body measurements and semen were taken on 12 stallions from four villages in the District of Karo, North Sumatra, Indonesia. There were two villages in Merdeka Sub-district i.e. Jaranguda and Merdeka; and two villages in the Berastagi Sub-district, i.e., Gundaling and Berastagi. Data were entered in Microsoft excel, checked, organized, and processed for further analyses. Means with standard errors (SE) for different traits were subjected to the standard analysis of variance technique. The results showed that the semen quality of stallions performed in the macroscopic and microscopic examination was of good quality with the color of semen was white grey, neutral pH, 74% dilute, 73.3% motility, 13.40 x 107 concentration with their semen abnormalities observed were normal. The morphology characteristics of stallions in the District of Karo showed an appearance with a variation coefficient value below 10% which means the measurement value of horizontal horse morphology is in good condition. The results support horse breeders to cross-breed periodically their stallions with local horses in the District of Karo because their variation coefficient showed good quality semen with uniform value.