Species diversity, composition, structure and management in agroforestry systems: the case of Kachabira district, Southern Ethiopia

Legesse, Abayneh; Negash, Mesele

doi:10.1016/j.heliyon.2021.e06477

Cited by 33 publications

(48 citation statements)

References 14 publications

(13 reference statements)

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“…Studies conducted in different areas of Ethiopia have found that more than 30% tree species in farm land are exotic tree species (Bajigo and Tadesse, 2015;Endale et al, 2017); indicating the expansion of the exotic tree species into the croplands at the expense of the native trees. However, in contrast, Legesse and Negash, (2021) have found that in Kachabira district of southern Ethiopia; native species comprise a larger portion than introduced species. With species like Catha edulis, Coffea arabica generating cash income (Habte et al, 2021), although a mono-cropping approach is negatively affecting the traditional parkland agroforestry systems (Endale et al, 2017).…”

Section: Constraints On Indigenous Multipurpose Agroforestry Tree Speciesmentioning

confidence: 81%

“…If people do not have title to land, there is no point in investing in trees which can take a long time for benefits to be realized. Farm household landholding size is also found to be the most important influencing factor that affects the diversity and planting tree species in farm lands ( Legesse and Negash, 2021 ).…”

Section: Literature Reviewmentioning

confidence: 99%

“…Thus, they both conserve plant genetic resources and are a form of in-situ conservation for biological diversity, both flora and fauna (Mulia et al, 2018;Habte et al, 2021). Because homegardens are a widespread agroforestry system, they therefore represent a large-scale land use system with potential for biodiversity conservation (Kabir and Webb, 2008;Legesse and Negash, 2021), lessens the pressure on natural forests (Yikunoamlak and Selemawi, 2019)…”

Section: Conservation Of Biological Diversitymentioning

confidence: 99%

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A review on the indigenous multipurpose agroforestry tree species in Ethiopia: management, their productive and service roles and constraints

Lelamo

2021

Heliyon

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Tree planting has a long history in Ethiopia and managing indigenous multipurpose trees is widely adopted by farmers, as a dominant feature of agricultural landscapes. Farmers manage different indigenous multipurpose tree species within agroforestry practices. But variability in agroecological conditions causes inconsistency on tree species selection, their intended benefits and ecological services. Management practices and current constraints on them were also the major issues on indigenous multipurpose agroforestry tree species in Ethiopia. Therefore, this article was initiated to review on indigenous multipurpose agroforestry tree species in Ethiopia, management practices applied to them, their productive and service roles and constraints. It found that Cordia africana, Millettia ferruginea, Erythrina brucei and Olea capensis are the major indigenous multipurpose tree species used in agroforestry systems in southern Ethiopia. Croton macrostachyus, Vernonia amygdalina, Faidherbia albida, Acacia nilotica, Acacia seyal and Grewia bicolour are found in the northern part of Ethiopia. Albizia gummifera, Cordia africana , Croton macrostachyus , Ficus vasta and Vernonia amygdalina are also found in the central highlands of Ethiopia. They are established through natural regeneration and farmers apply pruning, pollarding and coppicing tree management practices to harmonize their survival with integrated crops. Fruit, fodder, wood, timber and cash generation are the major productive roles of these tree species. In addition to these, they also have agroecological services through improving soil fertility, controlling erosion, mitigating climate change and conserving biological diversity. Despite their considerable uses and services; inadequate research and extension; shortage of knowledge; the expansion of cash crops and the small size of land holdings constrain the sustainability of these tree species. The government could encourage the wider use of agroforestry practices by policies to expand research and extension services. In addition to this, policy makers and agricultural development interventions should be encouraged to make more informed decisions regarding further research on indigenous multipurpose tree species in Ethiopia.

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Section: Constraints On Indigenous Multipurpose Agroforestry Tree Speciesmentioning

confidence: 81%

Section: Literature Reviewmentioning

confidence: 99%

Section: Conservation Of Biological Diversitymentioning

confidence: 99%

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A review on the indigenous multipurpose agroforestry tree species in Ethiopia: management, their productive and service roles and constraints

Lelamo

2021

Heliyon

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“…Фиксировались как единичные особи, а также группы особей, популяций (в целом или частично) и их сообщества (биологические макросистемы). Первостепенное значение отдавалось полевым исследованиям (изучение в естественной обстановке, непосредственно в природе) (Avdeev, 2020;Cao, 2016;Camarero, 2021;Ding, 2020;Kirby, 2017;Legesse, 2021;Larionov, 2020;Magnus, 2021;Ozherelieva, 2021;Oksuz, 2021).…”

Section: материалы и методы исследованияunclassified

Assessment of the modern biodiversity of the dendroflora of the Tsaritsa River valley and ways of its ecological rehabilitation

Семенютина¹,

Хатько²

2021

World Ecology Journal

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На территории Волгоградской области смена главных типов почв и растительности происходит по мере продвижения с севера-запада на юго-восток. По долинам рек размещаются интразональные природные комплексы. Богатство, разнообразие и специфичность растительного покрова определяется географическим положением долины реки Царица, которая расположена в пределах Иловлинско – Волжского полого – волнистого овражно-балочного ландшафта. Особенности расположения и геосистемы долины в целом определили разнообразные вариации эдафической зональной флоры, а также наличие пойменных и нагорно-байрачных лесов, лугов, каменистых обнажений, песчаных массивов и др., свидетельствуют о важности долины реки Царица как элемента ландшафтно-экологического фундамента города. В сухостепной зоне (Волгоградская область) с резко континентальным климатом, без системного полива формирование естественных лесных массивов, лесопарков возможно только в долинах рек. Цель исследований – оценка состояния дендрофлоры в долине р. Царица. Объекты исследований – растения в донных, овражных и пойменных врезах долины р. Царица. Для изучения растительного покрова проведены следующие мероприятия: сбор, обобщение и анализ опубликованных и полученных материалов, фотофиксация объектов исследований растительного покрова, полевые исследования, включая экологический мониторинг. Выявлено, что под воздействием антропогенного фактора исследуемая местность была сильно деградирована, существует необходимость экологической реабилитации. Первым этапом при достижении восстановления территории, необходимо обеспечить сохранность естественной флоры. Противоэрозионные лесозащитные насаждения необходимо проектировать на верхних террасах долины реки с учетом инвазивной активности высаживаемых растений. Формирование ольшаников в русловой части реки позволит закрепить сформированный рельеф на длительный срок, что приведет к постепенной реабилитации гидрологического режима и формированию условий подходящих для произрастания растений типичных для пойменных лесных сообществ. Проведение работ по экологической реабилитации делает необходимым восстановление природных сообществ, приближенных по составу к исходным фитоценозам, поэтому при подборе растений для формирования древесно-кустарниковых сообществ необходимо учитывать экологический, фитоценотический и эстетический принципы. On the territory of the Volgograd region, the main types of soils and vegetation change as they move from the north-west to the south-east. Intrazonal natural complexes are located along the river valleys. The richness, diversity and specificity of the vegetation cover is determined by the geographical location of the valley of the Tsaritsa River, which is located within the Ilovlinsky - Volga hollow - wavy ravine-beam landscape. The features of the location and geosystem of the valley as a whole have determined various variations of the edaphic zonal flora, as well as the presence of floodplain and upland-bayrach forests, meadows, rocky outcrops, sand massifs, etc., indicate the importance of the valley of the Tsaritsa River as an element of the landscape and ecological foundation of the city. In the dry-steppe zone (Volgograd region) with a sharply continental climate, without systematic irrigation, the formation of natural woodlands, forest parks is possible only in river valleys. The purpose of the research is to assess the state of dendroflora in the valley of the Tsaritsa River. The objects of research are plants in the bottom, ravine and floodplain cuts of the valley of the Tsaritsa River. To study the vegetation cover, the following activities were carried out: collection, generalization and analysis of published and received materials, photofixation of objects of vegetation cover research, field research, including environmental monitoring. It was revealed that under the influence of the anthropogenic factor, the studied area was severely degraded, there is a need for environmental rehabilitation. The first step in achieving the restoration of the territory, it is necessary to ensure the preservation of the natural flora. Anti-erosion forest protection plantings should be designed on the upper terraces of the river valley, taking into account the invasive activity of the planted plants. The formation of alders in the riverbed will allow to consolidate the formed relief for a long time, which will lead to the gradual rehabilitation of the hydrological regime and the formation of conditions suitable for the growth of plants typical of floodplain forest communities. Carrying out works on ecological rehabilitation makes it necessary to restore natural communities that are close in composition to the original phytocenoses, therefore, when selecting plants for the formation of tree and shrub communities, it is necessary to take into account ecological, phytocenotic and aesthetic principles.

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“…55% of forest plantation area [5,6]. This species has wide uses mainly for timber, plywood, fuel wood, poles production, live hedges and carbon sequestration [7][8][9]. These myriad uses has caused a surge in demand for propagation by seed [10].…”

mentioning

confidence: 99%

Untitled

2021

Journal of Forests

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Cupressus lusitanica is a key plantation species with many uses leading to demand for seed. This species produces seeds within cones, which are collected for seed extraction. There are variations in seed collection and handling which compromise quality. Few studies focus on cone morphometry and seed characterization, thereby causing a gap in quality improvement through packaging and subsequent germination. Fifty cones were collected from each of the thirty identified trees within a clonal seed orchard. Cone characterization, seed extraction and germination were performed in the laboratory. This was a factorial experiment with three factors: cone diameter, seed diameter and seed density and their influences on germination. The present study separated the cones by diameter (20mm sieve) and weight. Seed were sieved (2mm sieve) weighed, floated and germinated. The results showed that seed size and density heavily impacted on germination and thereby showing that sorting through sieving and floatation would provide a low cost technique for seed quality improvement. The technique in the present study improved germination from 25% to 50%, and also reduced the number of seeds per kilogram from 290,000 to 105,000.Contribution/Originality: The paper's primary contribution is finding that C. lusitanica seed size and density heavily impacted on germination and thereby showing that sorting through sieving and floatation would provide a low-cost technique for seed quality improvement. INTRODUCTIONCupressus lusitanica [1,2] also called Mexican cypress, was globally introduced in many tropical plantation areas to increase diversity of plantation species suitable for timber due to the susceptibility of other species to biological attacks [3,4]. In Kenya, C. lusitanica is the most widely planted commercial species comprising about

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Species diversity, composition, structure and management in agroforestry systems: the case of Kachabira district, Southern Ethiopia

Cited by 33 publications

References 14 publications

A review on the indigenous multipurpose agroforestry tree species in Ethiopia: management, their productive and service roles and constraints

A review on the indigenous multipurpose agroforestry tree species in Ethiopia: management, their productive and service roles and constraints

Assessment of the modern biodiversity of the dendroflora of the Tsaritsa River valley and ways of its ecological rehabilitation

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