Chemical Composition, in situ Degradability and in vitro Gas Production of Tagasaste (Chamaecytisus palmensis) Forage Harvested at Different Stages

The leguminous tree tagasaste is highly productive in the Ethiopian highlands. However, its nutritional value, as affected by the different agronomic practices is not fully understood under the tropical highland conditions. This study investigated the quality profile of tagasaste forage harvested at different re-growth stages by measuring the chemical composition, in situ degradability and in vitro gas production. Tagasaste re-growths after one year of establishment was harvested and the re-growths starting from the main rainy season (July) was harvested at 4, 6, 8 and 10 months. The harvested forages were fractionated into leaves and edible branches. Chemical composition, in situ degradability using rumen fistulated steers and in vitro gas production using rumen fluid from rumen fistulated dry cows were evaluated. The average crude protein (CP) content of tagasaste in the leaves ranged between 189 and 242 g kg-1 dry matter (DM) was not significantly affected by harvesting stage regrowth. The neutral detergent fibre, acid detergent fibre, acid detergent lignin and ether extract contents of tagasaste increased with length of re-growth. The amino acid profile of tagasaste protein showed high contents of the essential amino acids leucine and lysine but lower contents of methionine and histidine. Tagasaste grown under Ethiopian highland conditions was found deficient in phosphorus, sulphur, and sodium, but had adequate amounts of calcium, potassium, zinc and iron. The average in situ potential and effective degradability of leaves were 795 and 518 g kg-1 DM respectively and was lowest at the 10 months harvesting stage. The in vitro gas production declined with length of re-growth. Gas production was higher for leaves followed by branches with mean value of 43.7 and 39.1 ml 200-1 mg DM at 24 h respectively. The high CP content, degradability and in vitro gas production of tagasaste forage reveals its high potential to be used as a protein supplement for ruminants. The studied quality parameters should be further verified using animal performance

Milk yield and quality of crossbred dairy cows fed with different levels of vetch (Vicia dasycarpa) hay and concentrate on a basal diet of fresh cut napier grass (Penissetium purpureum)

This study was conducted to examine the effect of different levels of vetch hay (Vicia dasycarpa) supplementation on feed intake, milk yield and milk composition of 50:50 Boran-Freisian crossbred dairy cows fed a basal diet of napier grass (Penissetium purpureum). Five crossbred dairy cows at an early stage of lactation with average milk yield of 6 – 8 liters/cow/day and body weight of 390 ±15 kg (mean±STD) were arranged in a 5*5 latin square design. In the first 4 treatments, napier grass was fed ad libitum as basal diet, while in T5 (the control diet) native hay was the basal diet. In treatment 1, 2 and 3 vetch hay was supplemented at 20% (2.4 kg), 30% (3.6 kg) and 40% (4.8 kg) replacement of the total daily DM intake, respectively. In T4 and T5 concentrate mix (55% wheat bran, 43% noug seed cake (Gizotia abysinica) and 2% salt) was supplemented at the rate of 0.5 kg per liter of milk produced. Total dry matter intake differed among treatments in the order of T4>T3=T5>T2>T1. Milk yield was greater for concentrate supplemented treatments compared with the vetch supplemented ones, and was similar (P>0.05) among the different level of vetch supplemented groups. Milk fat and protein were not affected (P>0.05) by treatments. In general this study indicated that optimum milk production (8.81 liter/cow/day) can be obtained with the use of napier grass supplemented with 2.4 kg/cow/day vetch hay dry matter

Productivity and economic feasibility of cultivated forage and food crops in the central highlands of Ethiopia

The study was conducted to evaluate the yield performance of improved forage and food crops and to estimate the profitability of fodder and food crops in Holetta and Ejere areas, central highlands of Ethiopia during 2019 and 2020 cropping seasons. The experiment was laid out in randomized complete block design with three replications and evaluated two annual forage crops, two perennial forage crops, and two cereal food crops. Data on herbage dry matter (DM) yield was collected for forage crops while straw and grain yields were measured for food crops. Partial budget analysis was made to evaluate the economic feasibility of forage and food crops production. The result revealed that the herbage DM yield varied (P<0.05) at each location during each production year and combined over years and between the two locations. The straw and grain yields of food crops also varied (P<0.05) between the two production years and locations. The nutritive values of herbage and straw yields of forage and food crops differed (P<0.05) for all measured parameters. The crude protein and in-vitro dry matter digestibility of perennial forage crops were relatively higher than annual forage crops and straw of food crops. The partial budget analysis result indicated that the gross revenue (GR) and net return (NR) obtained from food crops were the highest followed by annual forage crops while the least was recorded from perennial forage crops during the first year of production. However, perennial forage crops produced the higher GR and NR than food crops and annual forage crops in the second year of production. In the second year of production, among the forage crops, Desho grass generated 308, 293, 287, and 232% while Rhodes grass generated 99, 92, 90, and 62% more NR than wheat, sole oat, barley, and oat/vetch mixtures, respectively. The benefit-cost ratio (BCR) of perennial forage crops was the lowest (3.0 for Desho and 1.6 for Rhodes) in the first year of production but the ratio was the highest (17.2 for Desho and 8.6 for Rhodes) in the second year of production. This confirms the better economic feasibility of perennial forage crops as they can be maintained using minimal management cost once they have been established

Effects of genotype and environment on forage yield, nutritive value and morphology of lablab (Lablab purpureus (L.) sweet)

The goal of the study is to determine the effect of genotype and environment on forage yield, forage nutritive value and to determine the relation between morphology and forage yield and nutritive value of lablab. Thirteen genotypes (one local and 12 improved) were replicated 3 times in a randomized complete block trial across three locations in Ethiopian lowlands namely, Bechi, Kite and Tepi. All forage samples were analyzed for dry matter (DM), crude protein (CP), and in vitro dry matter digestibility (IVDMD) using a combination of conventional nutritional analyses and near infrared reflectance spectroscopy. There was a significant (P < 0.001) effect of genotype, location and genotype*location on forage yield of DM, forage yield of CP, forage yield of IVDMD, CP, and IVDMD. The difference between means of minimum and maximum genotypes was 12.9 t/ha of DM, 3.12 t/ha CP, 8.22 t/ha IVDMD, 57 g/kg of CP and 56 g/kg of IVDMD. The correlation between plant morphology and forage yield and nutritive value was weak (r ≤ 0.41) in all locations and the combined data. Both genotype and location should be considered by the farmers when they decide to grow lablab for forage production. Morphological traits of lablab are not suitable to evaluate forage yield and nutritive value. Enhancing the awareness of farmers about the effect genetic-environment interaction effect of forage yield and nutritive value and the relation between morphology and yield and nutritive value would improve the uptake of lablab in mixed the farming system leading to more sustainable agricultural production

CLEANED Environment Assessment of small ruminant production systems in Ethiopia: Baseline Validation Workshop Report.

The SmaRT pack project is the implementation of integrated approaches of small ruminant production and productivity improvement technologies of breeds through community-based breeding improvement, feed & nutrition, animal health, collective marketing, and environmental sustainability in Ethiopia. Part of the Livestock CRP operating in Menz,Bonga, Abergela and Doyogena. In the framework of this project, the Alliance of Biodiversity International and the International Center for Tropical Agriculture (CIAT) and the International Center for Agriculture Research in the Dry Areas, (ICARDA), together with their partners, are jointly working on Comprehensive Livestock Environmental Assessment for Improved Nutrition, a Secured Environment and Sustainable Development (CLEANED) of the Small Ruminant value chain, in Menz, Bonga, Doyogena and Abergele, in Ethiopia. This report presents the discussions and outputs of the virtual CLEANED internal expert validation workshop that took place on Teams 25th June 2021. Due to the political unrest and COVID-19 situation in Ethiopia, this was an internal validation workshop. Together with experts from CIAT, the International Livestock Research Institute (ILRI) and ICARDA.The workshop aimed to validate the environmental impacts quantified by CLEANED for small ruminant systems in Ethiopia. CLEANED runs were carried out for Menz, Bonga, Doyogena and Abergele with key input data including farm inputs, herd composition and animal whereabouts. Based on these data, the model quantifies land use and water requirements, nutrient balances and greenhouse gas emissions (GHGe). This is a first step in understanding environmental trade-offs in the modeled systems and forms the basis for designing systems with a reduced environmental footprint and that enhance ecosystem services