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Indigenous Fruit Trees of Tropical Africa: Status, Opportunity for Development and Biodiversity Management

Agricultural Sciences 2015年第1期6卷 31-41页

作者： rasheed olufemi awodoyin Oluseun Sunday Olubode Justin Ugochukwu Ogbu rasheed Babatunde Balogun Jonah U. Nwawuisi Kalu O. Orji Department of Crop Protection and Environmental Biology University of Ibadan Ibadan Nigeria Department of Horticulture and Landscape Technology Federal College of Agriculture (FCA) Ishiagu Nigeria Department of Pest Management Technology Federal College of Agriculture (FCA) Ishiagu Nigeria Department of Agronomy Michael Okpara University of Agriculture (MOUA) Umuahia Nigeria

Tropical fruit trees constitute important biological resources in the global agrobiodiversity context. Unlike the tropical fruit trees of American and Asian origin, indigenous fruit trees (IFT) of tropical Africa have scarcely achieved the status of international recognition in commodity markets and research arena outside Africa. This paper presented a critical review of the status of IFT in the Tropical African sub-regions (of West Africa, Central Africa, East Africa, Southern Africa and the Indian Ocean Islands) in relation to the introduced naturalised fruit trees from tropical America and Asia, threats to the diversity and sustainable use of IFT, analysis of the opportunities and challenges of developing IFT, as well as targets for crop improvement of the rich IFT of Tropical Africa. Domestication programme via relevant vegetative propagation techniques for priority IFT of the sub-regions was examined and advocated, in addition to the adoption of complementary conservation strategies, including Field GeneBanks in the management of the continent’s IFT diversity.

关键词： Biodiversity Conservation Crop Improvement Domestication Indigenous Fruit Trees Introduced Species Tropical Africa

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Effects of soil physical properties on soil loss due to manual yam harvesting under a sandy loam environment

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International Soil and Water Conservation Research 2016年第2期4卷 121-125页

作者： Pius olufemi Olusegun Dada Olusegun rasheed Adeyanju Olayemi Johnson Adeosun Johnson Kayode Adewumi Department of Agricultural Engineering Federal University of AgricultureAbeokuta P.M.B.2240AbeokutaOgun StateNigeria

Soil degradation is a growing problem worldwide because it reduces the fertile top layer of the soil available for food production and one such degradative action is soil erosion due to the harvesting of *** loss due to crop harvesting with particular reference to yam tubers has not been quantified globally despite the fact that yam is a major staple food consumed worldwide and it is prevalent in many parts of *** yams in our environment is usually done with the soil attached to the yams due to the fact that farmers do not want additional work of removing soil attached to the *** study investigates the soil physical properties that influence soil loss due to yam harvesting in Abeokuta,South-Western Nigeria and to assess the quantity of soil loss due to yam *** on representative sampling area per location,yam tubers were harvested manually within the entire yam farmland from October to December *** weight,net weight and the amount of soil adhering to the yams were *** of soil physical properties such as soil moisture content,heap bulk density,inter-heap bulk density and soil texture were investigated with respect to soil *** results showed that moisture content ranged from 4%to 15%,heap bulk density ranged from 0.93 to 1.29 g cm^(-3) and inter-heap bulk density ranged from 1.03 to 1.50 g cm^(-3).They all had a positive correlation with soil *** particle size analysis for Federal University of Agricultural,Abeokuta(FUNAAB)and Alabata revealed that sand content was(86.78%and 88.32%),clay content(10.69%and 7.6%)and silt content,(2.53%and 4.08%)*** also revealed that clay content of the soil positively influenced the total soil loss during the yam *** mean soil losses in Federal University of Agriculture,Abeokuta(FUNAAB)and Alabata village yam farms were 4303 and 2125 kg/ha/harvest *** study also revealed that soil moisture content at harvesting time and clay

关键词： Heap bulk density Manual yam harvesting Soil degradation Soil loss Soil physical properties

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