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አህፅሮት ይህ ጥናት በሆለታ ግብርና ምርምር ማዕከል በሆለታና አዳበርጋ የመኖ ምርምር ጣቢያዎች የበቆሎ ዝርያዎች ያላቸውን የደረቅ መኖ ምርት እና የመኖ ንጥረ-ነገር ይዘታቸዉን ለመገምገም የተካሄደ ነበር፡፡ ጥናቱም በሁለት የማጨጃ ጊዜ የተካሄደ ሲሆን የመጀመሪያው በሳይሌጅ (ገፈራ) ደረጃ ሲሆን ሁለተኛው በአረንጓዴ ቆረቆንዳ (ኮብ) ደረጃ ነበር፡፡ የደረቅ መኖ ምርት፣ የዕፅዋት ቁመት እና በአንድ ተክል ላይ የሚገኙ ቆረቆንዳዎች (ኮብ) ብዛት እና የመኖ ጥራት መረጃዎች ተሰብስበዋል፡፡ በሁለቱም የማጨጃ ጊዜ በዕፅዋት ቁመት፣ በደረቅ መኖ ምርት፣ በሚፈጭ (Digestible) የደረቅ መኖ ምርት እና በፕሮቲን የደረቅ መኖ ምርት ላይ ከፍተኛ (P

Shortage of feed is a critical problem for livestock production in Ethiopia. However, the selection of oat genotypes that perform better under vertisol conditions is very important to mitigate the feed shortage problem in the central highlands of Ethiopia. So, the study was designed to evaluate the agro-morphological and nutritional performance of fifteen oat genotypes under vertisol conditions during the main cropping seasons of 2015 and 2016 at Kuyu and Ginchi sub-stations of Holetta Agricultural Research Center. Randomized complete block design replicated three times was used for evaluating the genotypes. The genotypes were sown with the recommended seeding rate of 100 kg ha-1 using an inter-row spacing of 20 cm. Diammonium phosphate (DAP) fertilizer at the rate of 100 kg ha-1 was uniformly applied at sowing for all genotypes at both locations and years. Data were collected on plant height, dry matter yield, leaf to stem ratio, straw yield, seed yield, thousand seed weight, harvest index, and nutritive values. All measured data were subjected to analysis of variance using procedures of SAS general linear model. The genotypes responded differently (P, Journal of Agriculture and Environmental Sciences, Vol 6 No 2 (2021)

Background: Ethiopia has the highest livestock population in Africa. However, the productivity of livestock and the role it plays in the economy of the country is very low. This is mainly because of the inadequate availability of quality feed. Enhancing the production of alfalfa could contribute to overcome the shortage of feed in the country and enhance the productivity of all classes of livestock in the country. Objective: To evaluate performances of high-yielding and disease-tolerant alfalfa varieties. Materials and Methods: Six introduced alfalfa varieties were tested against a standard check (DZF-552) and an old introduction of alfalfa (hairy Peruvian) varieties for biomass yield, quality attributes, disease and pest reactions, and other agronomic traits at Holetta, Kulumsa, Debrezeit, Melkassa, Werer, and Pawe Agricultural Research Centers during the 2013 and 2014 cropping seasons. Three superior alfalfa varieties (alfalfa-1086, alfalfa-ML-99 and alfalfa-998) were selected from multi-location evaluation trials and the candidate varieties with recently released alfalfa variety (DZF-552) were evaluated under verification trial at Kulumsa, Melkassa, Werer, and Wondo-genet Agricultural Research Centers in 2015. Results: Alfalfa-1086, alfalfa-998, and alfalfa-ML-99 had dry matter (DM) yield advantages of 30, 27, and 23% over hairy Peruvian variety, respectively. Alfalfa-1086, alfalfa-ML-99 and alfalfa-998 also had crude protein (CP) yield advantages of 109, 89, and 73% over the hairy Peruvian variety, respectively. More importantly, alfalfa-1086, alfalfa-ML-99, and alfalfa-998 varieties had CP yield advantages of 55, 41, and 28%, respectively, over the recently released (DZF-552) check variety. The in vitro dry matter digestibility (IVDMD) yield advantages were 66% and 23% for alfalfa-1086; 58 and 17% for alfalfa-ML-99 and 57 and 16% for alfalfa-998 over the hairy Peruvian and recently released standard check variety, respectively. The results revealed that the candidate varieties had better ash, CP, and IVDMD but lower fiber contents when compared to the check varieties. Conclusions: The released varieties had advantages of CP and IVDMD yields over hairy Peruvian and standard check varieties. Moreover, the released varieties had advantages of leaf to stem ratio, CP content, and IVDMD over the two checks. Due to the better nutritional quality and yields of CP and IVDMD, the released varieties are very important to improve the livestock production and productivity of smallholder farmers. Therefore, the two alfalfa varieties (alfalfa-1086 and alfalfa-ML-99) were approved for cultivation in the low to high altitude areas of Ethiopia due to their better yield performance, quality attributes, disease and pest reactions, and other agronomic traits., East African Journal of Sciences, Vol. 15 No. 2 (2021): East African Journal of Sciences

Tagasaste (Chamaecytisus palmensis) is one of productive multipurpose tree species grown in the tropical highlands of Ethiopia. Despite its potential role as a source of forage and natural resource conservation, adequate studies were not made on agronomic practices such as establishment, harvesting managements and utilization. The objectives of this study were to investigate the effect of establishment and subsequent harvesting managements on biomass (BM) yield, crude protein (CP) content, botanical fractions of total biomass and persistency of tagasaste. Establishment of tagasaste was undertaken for three consecutive years at Holeta Research Center (HRC) in the highlands of Ethiopia. The two harvesting management trials, harvesting stage and growing season were arranged separately in a randomized complete block design with three replications. In harvesting stage study, four treatments of harvesting stage including HS1 (3 harvests per year at 4 months interval), HS2 (2 harvests per year at 6 months interval), HS3 (one harvest at 8 months and the 2nd harvest after 4 months) and HS4 (one harvest at 10 months and the 2nd harvest after 2 months) were compared annually. In the growing season study, tagasaste was allowed to regrow for 6 months so that exposed to the main rain, dry and short rainy seasons of the area. Planting and harvesting year had a significant (P