Agro-forestry

PERENNIAL PLANTS DIVERSITY, CARBON.STOCK AND SOCIOEC ONOMIC CONTRIBUTION OF HOME GARDEN AGROFORESTRY PRACTICES IN SORO DISTRICT, HADIYA ZONE, SNNP, ETHIOPIA

Wed, 01 May 2024 00:00:00 GMT

PERENNIAL PLANTS DIVERSITY, CARBON.STOCK AND SOCIOEC ONOMIC CONTRIBUTION OF HOME GARDEN AGROFORESTRY PRACTICES IN SORO DISTRICT, HADIYA ZONE, SNNP, ETHIOPIA TEMESGEN MENGESHA LUGO; Dargo Kebede (Assist. Prof); Eyasu Mekonnen (Assist. Prof.) The high diversity of plant species in homegardens has significant socioeconomic and agro ecological implications for rural livelihoods. The current study was carried out in Soro district from September to May 2023.G.C, with the primary goal of determining perennial pla ntsdiversity, carbon stock and the socioeconomic contribution of homegarden agroforestry pr actice to rural household livelihoods. Purposive sampling techniques were considered to select the study area, proportionate sampling techniques were used to select kebeles and each household was selected by systematic random sampling technique. Three Kebeles were deliberately chosen based on the abundance of homegarden agroforestry accessibility and three elevation gradients. A plot size of 10 m x 10 m was used to inventory plant species in 27 home gardens from a total sample size of 110. All plants with more than 5 cm DBH (at 1.3 m height) were measured and recorded.. Plant species diversity was inventoried, and biomass assessment and soil organic carbon were carried out for 27 homegardens from 110 total sample sizes. A total of 54 plant species belonging to 43 families were recorded in the studied homegarden. Fabaceae was the most frequent family in the study area and it is represented by six species. The diversity differed significantly (p≤0.05) along the elevation categories. The importance value index of individual perennial plants in the homegarden was Ensete ventricosum was ranked first with a mean IVI of (48.2%) in the tree-Ensete dominated homegarden agroforestry system. The degree of species richness was highest at Sundusa foll owed by Danetora and Bambo respectively. The mean Shannon Weiner diversity index in the t hree elevation was194,1.88,and1.79 fo rperennial plants high elevetion,midelevetion,and low elevation respectively. According to the study results the mean total biomass carbon and soil carbon stocks were significantl (p=0.001) higher in the upper elevation(32.36±15.81Mgc ha-1 ) allowed middle (26.77±12.93Mgc ha-1 ) and lower (19.21±9.09Mgc ha-1 ) elevation. The mea n soil organic carbon was higher in upperelevation (35.83±3.02Mgc ha-1 ) followed middle (3 4.4±2.30Mg cha-1 ) and lower (30.11±2.02Mgc ha1 ) respectively. Perennial plants in homegar den agroforesity is a source of food and cash crops, household income source, animal feed, source of medicinal plants, and benefits from livestock products. The study emphasizes the need to prevent future risks to plant species and homegarden economic performance. 93

WOODY SPECIES DIVERSITY AND CARBON STOCK POTENTIAL OF PARKLAND AND COFFEE-BASED AGROFORESTRY SYSTEMS, HABRO DISTRICT, EASTERN ETHIOPIA

Thu, 01 Feb 2024 00:00:00 GMT

WOODY SPECIES DIVERSITY AND CARBON STOCK POTENTIAL OF PARKLAND AND COFFEE-BASED AGROFORESTRY SYSTEMS, HABRO DISTRICT, EASTERN ETHIOPIA YOSEF FANTAYE HAILE; Solomon Estifanos (MSc, Assist. Prof.); Samuel Feyissa (PhD, Assist. Prof.) Agroforestry practice is well known in eastern Ethiopia and multifunctional working landscape and can play in conserving and enhancing biodiversity and carbon sequestration. Despite some studies related with plant species diversity, its contribution and carbon stock potential of agroforestry. But the study on woody species diversity and carbon stock potential of coffee-based and parkland agroforestry systems in a single document is not well studied. The study was carried out to assess woody species composition, diversity, carbon stock and effect of species diversity on carbon stock of parkland and coffee-based agroforestry system. The study was conducted in Habro district eastern Ethiopia. Sixteen study plot representative of each agroforestry system was selected randomly. Inventory of the woody species assessment were employed in the 40×40 and 20m*20-meter plot for parkland and coffee-based agroforestry systems and 5m*5m was laid down for coffee shrub and 1*1 meter for soil sample. For woody species with ≥ 2.5cm DBH, and tree height were taken. soil samples were taken from the four corners and center in two soil depth (0-20 cm and 20-40 cm). Basal area, stem density diameter and height class distribution were computed to characterize structure of woody communities. Species diversity, biomass and soil carbon stock were also determined. Biomass carbon was estimated using allometric equations. A total of 57 woody species belonging to 31 families were recorded. Of all species identified, 38 woody species were recorded in parkland and 43 woody species were recorded in coffee-based agroforestry system. The study indicated that the woody species Shannon and richness were higher at coffee-based than parkland agroforestry. The biomass carbon of coffee-based agroforestry was considerably higher (33.94Mg C ha-1) than the parkland agroforestry (10.28Mg C ha-1). Total C stock (biomass C + soil Carbon) range from 124.72 to 192.64 Mg C ha-1 with average value (158.68 Mg C ha-1), indicating that a major portion of the total amount of C in the system is stored in the soil. However, relationship between woody species diversity and carbon stock of both agroforestry system have almost positive relation but not significant except Shannon diversity significantly positive relation with total carbon stock in parkland agroforestry. Finally, the results provide an input for implication of the future potential of agroforestry management in biodiversity conservation and climate change adaptation and mitigation purpose of national program. 69

WOODY SPECIES DIVERSITY AND CARBON STOCK IN HOMEGARDEN AGROFORESTRY PRACTICE IN METU DISTRICT OF ILU ABA BOR ZONE, SOUTHWESTERN ETHIOPIA

Wed, 01 Nov 2023 00:00:00 GMT

WOODY SPECIES DIVERSITY AND CARBON STOCK IN HOMEGARDEN AGROFORESTRY PRACTICE IN METU DISTRICT OF ILU ABA BOR ZONE, SOUTHWESTERN ETHIOPIA Mosisa Dugasa Worji; Tessema Toru (Ph.D., assist. Prof.); Dargo Kebede (Msc, Assist. Prof.) Homegarden agroforestry practices encompass an assortment of woody species and provide a number of social, ecosystem services and economical benefits. Many studies have been undertaken to identify woody species and quantify the carbon stock potential of homegarden agroforestry. However, there is still little focus on the relationship between woody species diversity and carbon stocks. This study was aimed at assessing woody species diversity and carbon stock and the relationship between woody species diversity and carbon stock of homegarden in Metu District, Southwest Ethiopia. Metu District was purposively selected based on the presence of homegardens agroforestry practices and the researcher's familiarity with the area. Accordingly, three Kebeles, namely, Ale Buya, Serdo, and Beroye Gebisa were identified. A nested quadrat size of 20 m x 20 m, 5 m x 5m, and 1 m x 1m were used for trees, shrubs, and samplings, and soil samples respectively. All woody species, both fruit and non-fruit trees, with a DBH ≥2.5 cm and a height ≥1.5 m were identified, measured, and documented in 45 plots. The diameter of the coffee shrubs was measured at stump height (40 cm). Ninety composite and ninety undisturbed soil samples were taken for Soil organic carbon and bulk density analysis, respectively. To quantify biomass carbon stock, an allometric equation was used. A total of 47 woody species belonging to 28 families were found in the 45 quadrates of the study area. The average H’ and evenness of woody species were 1.80 and 0.81, respectively. There were significant differences (P <0.05) in the diversity indices. The average bulk density and Organic Carbon% of the soil were 1.16 and 1.21 g cm-3, and 2.14 and 1.08% for (0–30 cm) and (30 – 60 cm) depth, respectively. The overall mean Biomass Carbon, Soil Organic Carbon, and Total Carbon were 49.25, 169.86, and 219.11±49.13 Mgha-1 respectively. Soil organic carbon stocks comprised 77.5% of the total carbon stock. In general, the homegarden agroforestry practices of Metu District, Southwest Ethiopia, had a high contribution to woody species conservation and carbon stocks. To improve species composition of villages and kebeles with lower values, the attintion of different stakeholder is important.The high carbon stock in the homegarden agroforestry system of the study area has substancial contribution for mitigation of greenhouse gasses. 85

WOODY SPECIES DIVERSITY AND CARBON STOCK OF SCATTERED TREES ON FARMLAND ALONG ELEVATION GRADIENT IN GEMECHIS DISTRICT, WEST HARARGHE ZONE, OROMIA, ETHIOPIA

Wed, 01 Mar 2023 00:00:00 GMT

WOODY SPECIES DIVERSITY AND CARBON STOCK OF SCATTERED TREES ON FARMLAND ALONG ELEVATION GRADIENT IN GEMECHIS DISTRICT, WEST HARARGHE ZONE, OROMIA, ETHIOPIA TESFA ADMASU ZELLEKE; Dargo Kebede (Assistant professor); Eyasu Mekonnen (Assistant professor) Scattered trees within farmland are common land-use in Ethiopia and many parts of the tropics. These systems play an important role in climate change mitigation and adaptation, through carbon sequestration. Therefore, in the eastern part a little information compiled, generally and specifically in the study district don’t any information available concerning woody species diversity of scattered trees on farmland and its role in carbon sequestration. This study objectives, was conducted to assess woody species diversity and carbon stock of scattered trees on farmland along elevation gradient in Gemechis district. In order to achieve these objectives, the data of woody species inventory was carried out on 27 plots (each 100mx100m) on farmland. A data was administered to gather information on woody species and soil analyzed using SPSS version 20 at 5% significance level. For woody species ≥5cm DBH, measurements of DBH and trees height were taken. Woody density, frequency, basal area and importance value were computed to characterize structure of woody species. Species diversity and biomass carbon were also determined. Biomass carbon was estimated using allometric equations. The study indicated that the woody species diversity indices were higher at Kuni Segeriya and the lowest at Ela Oda. The scattered trees in farmland in the study area have stored 280.62 Mt C ha–1 and 31.18±1.35 Mt C ha–1 total carbon stock and mean carbon stock, respectively. The woody species in farmland stored relatively higher aboveground carbon which could help in climate change mitigation. Therefore, paying equal attention to woody species in farmland as to forest is a better solution in reducing carbon emission 80