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Variations in shoot and root growth of three provenances of faidherbia albida in clay and sand soil

Journal of Forestry Research 2016年第1期27卷 59-66页

作者： Agnes Gachuiri Catherine Muthuri Jonathan K.Muriuki Ramni H.Jamnadass Fergus Sinclair World Agroforestry Centre (ICRAF) United Nations Avenue Gigiri

The variation in shoot and root seedling growth traits was compared among three faidherbia albida （Del）. A. Chev. provenances originating from Kenya （Taveta）, Malawi （Bolero） and Ghana （Bolgatanga）; representing east, south and west Africa, respectively. Bulked seeds from three provenances were grown in two soil types （clay and sand） at the World Agroforestry Centre nursery, Nairobi. Seedlings grown in clay soil had high shoot growth and shoot to root ratios but shorter root length, lower number of nodules and specific root length compared to seedlings in sand soil. Shoot to root ratios reduced with time and this was more pronounced in sand soil. Overall, the Bolero and Taveta provenances had higher growth than the Bolgatanga provenance. This was probably because plants grown in nutrient-rich clay soil invest more in shoot growth as compared to root growth. Longer root growth in sand soil shows a better adaptive mechanism that increases competitive ability and survival in nutrient-poor systems. Variations observed among the seedling variables such us shoot and root growth could be used for early selection for reforestation and agroforestry in predominantly clay and sand soil areas.

关键词： faidherbia albida Provenance Soil type Shoot and root growth

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Achieving food and nutritional security through agroforestry: a case of faidherbia albida in sub-Saharan Africa

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Forestry Studies in China 2011年第2期13卷 123-131页

作者： Neo C. MOKGOLODI Moffat P. SETSHOGO SHI Ling-ling LIU Yu-jun MA Chao National Engineering Laboratory for Tree Breeding College of Biological Sciences and Biotechnology Beijing Forestry University Beijing 100083 E R. China Department of Biological Sciences University of Botswana Private Bag UB00704 Gaborone Botswana

faidherbia albida is an ideal agroforestry tree commonly intercropped with annual crops like millet and groundnuts in the dry and densely populated areas of Africa. With its peculiar reverse phenology, it makes growth demands at a different time from that of crops. In addition, it deposits great amount of organic fertilizer on food crops. Leaves entering soils are comparable to fertilization of almost 50 t·ha^-1year^-1 of manure in dense stands of 50 large trees per ha. These nutrients help maximize agricultural production and reduce the need for a fallow period on poorer soils. Research has shown that millet grown under F. albida yielded 2.5 and 3.4 fold increases in grain and protein, respectively. Animals eat pods which contain mean amounts of crude protein of 20.63% and carbohydrate of 40.1% in seeds. Moreover, the continued existence ofF. albida in agroforestry parklands as in Ethiopia and Mali signifies the success of traditional conservation measures. Modem scientists have also developed much interest in the role of agroforestry in maintaining long-term biological balance between agriculture and livestock production systems. To ensure food security, which still remains a major challenge in sub-Saharan Africa, and concurrently minimize environmental degradation, promotion of agroforestry that specifically involves indigenous trees is crucial. We discuss the prospective role ofF. albida in alleviating poverty while simultaneously protecting the environment from factors associated with, for example, deforestation and loss of biodiversity. The overall aim is to promote wide-scale adoption ofF. albida as a valuable tree crop in farming systems, particularly in those areas where it remains unexploited.

关键词： agroforestry faidherbia albida food security fodder nitrogen fixation sub-Saharan Africa

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Functional groups of Sahelian trees in a semiarid agroforestry system of Senegal

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Journal of Plant Ecology 2018年第3期11卷 375-384页

作者： Joseph S.Diémé Mayécor Diouf Cristina Armas Graciela MRusch Francisco I.Pugnaire Estación Experimental de ZonasÁridas Consejo Superior de Investigaciones CientíficasCtra.de Sacramento s/n04120 La CañadaAlmeríaSpain Centre National de Recherches Forestières Institut Sénégalais de Recherches Agricoles(CNRF/ISRA)DakarSenegal Norwegian Institute for Nature Research TrondheimNorway

Aims Addressing plant responses to water stress is critical to understand the structure of plant communities in water-limited environments and to forecast their resilience to future changes in *** a semiarid agroforestry system in the Sahelian savannah of Leona(Senegal),we selected nine common tree species and explored their stress-resistance *** species represent a variety of life forms and are of high regional socio-economic *** hypothesized that different species would show different suites of traits to cope with water stress and expected to identify functional groups differing in strategies to withstand water *** Along a dry and a wet season,we monitored four traits reflecting above-and below-ground strategies of resource acquisition such as predawn leaf water potential(ψpd),specific leaf area(SLA),leaf thickness and leaf area index(LAI).We also measured two mor-phological traits:trunk diameter and tree *** andψpd were measured six times during the dry and rainy seasons,and the other traits were measured *** Findings We identified two functional classes subdivided into two func-tional groups of each *** first class included deciduous and semi-deciduous species that generally had large SLA,low leaf thickness and small-to-intermediate inter-seasonal varia-tions inψ*** second class included evergreen species of two functional groups that differ in SLA,leaf thickness and the mag-nitude of inter-seasonal variations ofψpd throughout the *** four functional groups identified in this study represent plant strategies differing in their response to changing environmental conditions.

关键词： Acacia tortilis Adansonia digitata Balanites aegyptiaca Celtis integrifolia Combretum glutinosum faidherbia albida functional traits Neocarya macrophyla Sclerocarya birrea Tamarindus indica water stress

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