Abstract
The use, types and method of fertilizers for agricultural and forest plants should be sustainable, ecofriendly and natural to the environment. Application of green manure is being used nowadays for soil nutrient management, growth and plant yields because of their natural effects. This study investigated the use of green manure andinorganicfertilizer on the growth performance of Tetrapleura tetraptera. Topsoil, leucaenana leucoephala (leave powder) and inorganic fertilizer (NPK 15: 15:15) were used. The fertilizer were weighed and applied to the 5kg of soils at 0g, 10g and 20g each and were replicated six times. Growth parameters such as seedling heights, number of leaf and stem diameter were assessed weekly for aperiod of three months. The application leucaenana leucoephala’s leave powder as green manure showed significantly high effects on the growth parametersof Tetrapleura tetraptera seedlings at p ≤ 0.05. This study has shown the efficacy of leucaenana leucoephala’s leave powder as green manure for optimum growth of Tetrapleura tetraptera seedlings.
Highlights
The climatic pattern of the area is tropically dominated by annual rainfall which ranges from 1,400-1,50Omm and average relative humidity of about 65% while the average temperature is about 26°C (FRIN, 2016)
The seed of Tetrapleura tetraptera were collected from the mature tree of T.tetraptera at the snailry experimental site opposite Muslim co-operative of the Forest Conservation and Protection Department Forestry Research Institutes of Nigeria (FRIN), Ibadan The top soil used was collected from the Gmelina plantation within the Federal College of Forestry, Ibadan while Leucaena leucocephala’s leaves used for the study were collected from the Forestry Research Institute of Nigeria (FRIN) Quarters
Leucocephala’s leaf powder andNPK (15:15:15) weremixed thoroughly for 3days prior to sowing. 90 healthy seedlings were picked from germination boxes and 3 seedlings each were transplanted into the polythene pots
Summary
The increase in population, urbanization, industrialization, and mismanagement of land practices has led to deforestation, over exploitation of forest tree species, degradation of soil and land. Plant serves as source of solution to its environment They have been important source of medicine for thousands of years. The demand for indigenous, valuable and economic tree species are widely increasing and most of these important tree species are tending towards extinction, a need for domestication, afforestation, reforestation of these tree species. Most of these forest trees are uncultivated and exhibit varying levels and different kinds of seed dormancy. In the forest, the crown is fairly smooth, grey-brown, very thin, slash reddish, string smelling, fairly thick, twigs and young foliage virtually glabrous or minutely hairy (Oruwa, 2009). The phytochemical screening revealed the presence of alkaloids, flavonoids, tannins, saponins, anthraquinnes, mucilages, oses and holosides, coumarin and reducing sugar and these could be
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