Browsing by Author "Tibebu, Manaye"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    INFLUENCE OF TRANSPORTATION AND USE OF EFFECTIVE MICROORGANISMS TREATED FEEDS ON GROWTH, CARCASS YIELD AND MEAT QUALITY OF ARSI-BALE AND AFAR SHEEP
    (2019-08) Tibebu, Manaye; Dr. Ashenafi Mengistu , Dr. Adugna Tolera; Dr. Geert Geesink
    The present study was conducted with the objectives of assessing the level of deployment of sheep for carcass export and effect of transportation of sheep and goats on body weight, mortality and carcass condemnation; studying the effect of trekking or trucking on body weight, carcass and meat quality of Arsi-Bale and Afar lambs; assessing the effect of Effective Microorganisms (EM) application rate and duration of ensiling on tef straw silage quality; evaluating the effect of genotype and concentrate supplementation of tef straw silage on growth performance, carcass and meat quality of Afar and Arsi-Bale lambs. A retrospective abattoir survey was conducted in export abattoirs in Bishoftu and Modjo towns. The experimental design of the experiments was factorial arrangement incompletely randomized design. In the transportation experiment two lamb groups were transported 25 km from Bishofti to Modjoby either trekking or trucking and the third was kept at abattoir for five days before the other two. The silage was made from tef straw inoculated with EM and packed in plastic bags. It was then, subjected to physical and chemical analysis. During feeding and digestibility trials each lamb was fed tef straw silage alone, or supplemented with bokashi alone or mixed with noug seed cake. The survey result indicated that, 3,904,338 sheep and goats were slaughtered for export in 2012/13-2014/15. Mortality and weight loss caused by transportation, respectively were 0.01% and 6.49% for sheep and 0.10% and 6.58% for goats. There were 0.09% full and 0.12%, partial carcass condemnations.The physical appraisal of tef straw silage showed that it was of good quality. The water socked tef straw ensiled for 21 days inoculated with EM at a rate of 500ml/kg was found to have better nutritional quality. Content and digestibility of crude protein and digestibility of organic matter appeared better for 21 days ensiling period. The transportation experiment revealed that Arsi-Bale lambs were better than Afar for most carcass traits. All ultimate pH, color and sensory eating quality of meat samples from both transportation and feeding trials were in the range of good quality meat. The intake of most nutrients of Afar was higher than the Arsi-Balewhile it was lower for control lambs except the fibers. The Arsi-Bale lambs performed better than Afar lambs in live weight, feed efficiency and all the carcass traits. Most of the carcass linear measurements were influenced only by diet for which the supplemented lambs were better. The L* value and fat content were higher for meat from Afar lambs while other physicochemical characteristics were similar for bothbreeds. Mode of Transportation did not affect most of carcass traits, but meat pH.However, there was significant breed effect with Arsi-Bale lambs showing higher growth performance and better predictability with better lean meat yield having acceptable quality that makes it more suitable to be used for export meat production.
  • No Thumbnail Available
    Item
    Temporal Change Detection of Vegetation Coverage and Characterized Impacts of Drought on Existing Vegetation of Arbaminch Nechsar National Park of Ethiopia Using Remote-Sensing
    (Addis Ababa University, 2020-09) Tibebu, Manaye; Worku, Zewdie (PhD)
    The assessment of LULCC and vegetation drought is vital in the environment and climate change studies as vegetation cover change in the protected area indicate the status of available resources. Vegetation cover change and drought patterns are the main problems in Arbaminch Nechsar national park. However, there are minimum attempts made to investigate this problem with a different geospatial method and data sets. Hence LULCC and drought analysis is crucial to recognize major pressures and to make a clarification for prospect management of the park environment and territories. This study aims to evaluate LULC transition and drought over the past 40 years using the vegetation condition index (VCI) and Normalized Difference Vegetation Index (NDVI).In this study Landsat, MODIS data, metrological data of the area, GPS field data were used to detect the changes in vegetation and drought. Using Bothe supervised classification algorithm and Markov modeling ware, for determination of LULCC and projected land use the land cover of the park respectively. During the study period from 1989-2019, there were significant land-use transitions, degraded grassland, and cultivated land area shows increments of size about 7.61% and 7.41% respectively. Contrary, in the study period open grassland and riparian forest, reduces the size the amount by 14.78% and 7.36 % correspondingly.in the period 2009-2019 the result observed 1.2% of riparian forest transit into cultivated land and 1.2% of open grassland translated into degraded grassland. The reason for this reduction is linked to excessive harvesting for charcoal and also fire for obtaining grazing fields. The outcome confirms open grassland is covered by another encroachment plants. For the study, the region of the park was affected by drought. The period 2000 Arbaminch NSNP has not been affected by drought .over the year 2009 and 2019 central part of the park and the area which placed in the shoreline of Lake Chamo and Lake Abaya has affected by drought. The problem of LULCC and drought existence is directly or indirectly associated with the activity of humans. Hence, Understanding of the vegetation and drought changes and taking corrective measures are recommended for proper management of the park.