THE EFFECT RATE OF FERTILIZER APPLICATION ON VEGETABLE (TELFAIRIA OCCIDENTALIS)

Thesis Overview

 INTRODUCTIONIn Africa indigenous vegetables remain popular in rural areas where they are often considered to be more nutritive than exotic vegetables. Telfairia occidentalis commonly called fluted pumpkin is an important leaf and seed vegetable indigenous to Southern Nigeria and grown in the forest zone of west and central Africa (Nigeria, Ghana and Sierra Leone being the major producers). It probably originated in south east Nigeria and distributed by Igbos who have been cultivated this crop since time immemorial.The leaf is of high nutritional, medicinal and industrial values rich in protein (29%), fat (18%) and minerals and vitamins (20%).The nutritional value of pumpkin seeds is different from that of leaves. The protein contents of seeds and leaves are 20.5g and 2.9g, respectively [5]. Seeds have high nutritive and calorific values which make it necessary in diets. Fluted pumpkin is of local ethnobotanical importance in the folklore, dietary and cropping systems of Igbos. The level of iron is the factor for use of the leaf extraction as blood tonic which can be administered to weak patient.Nitrogen is usually ascribed with the building up of leaf tissues. This is one of the essential elements most commonly used to increase crop yield. It is a constituent of all protein and chlorophyll. Plant tissue, usually contains more nitrogen than any other nutrients. Nitrogen application is used to produce rapid vegetative growth of vegetables. It promotes luxuriant growth, and increases number of leaves. These encourage photosynthesis and partitioning of photosynthesis rate into the economic parts of the plant. It is also necessary for reproduction and promotes the uptake of phosphorus and potassium by plants. However, nitrogen requirement for vegetable is 50kg N/ha or more in savannah zone of Nigeria [8]. It has been reported that 100kg N/ha is suitable for vegetable based on dual purposes (leaf+ fruit). The recommended rate for the production of fluted pumpkin is 16okgN/ha. In Nigeria, farmers realize the need for soil amendments by using available resources such as crop wastes, farmyard manure and poultry waste [10]. The use of organic fertilizer as source of nutrients to crops has recently received comprehensive review by Awodun,; Akanbi et al. and Ojetayo et al. . This fertilizer type improves soil’s physical, chemical and biological conditions, which in turns improve crop growing environment and culminate in the better production of economic plant parts.Organic fertilizer fortified with inorganic materials specially formulated to replenish the soil and improve plant fertilization. It releases nutrients in soil in the form that plants can easily absorb, it will activate soil micro-organism and increase microbes, which will help decomposition process of organic matter and transform them into nutrients that plants can easily absorb. This will promote higher plant growth, healthier crops and better fruit yield. It reduces the needs of chemical fertilizer, which will lead to lower production cost and indirectly increases income. Organic crops contained higher levels of 21 essential nutrients than their conventionally grown counter parts including iron, magnesium, phosphorus and vitamin c. The organic crops also contained lower levels of nitrates, which can be toxic to body.Although, many research activities have reported better performance of crops with fertilizer application one of the method through which plants would display its potential genetic capability is by supplying the plants with adequate amount and types of fertilizer at the right time. Research efforts are therefore required to recommend fertilizer types for sustainable production of Telfairia occidentalis inUmuagwo, the Guinea Savanna zone of south west Nigeria.1.1 STATEMENT OF THE PROBLEMAccording to Jariene, the seeds contain about 50% fats, approximately 30% protein, sugar, B vitamins, ascorbic acid, Phytosteroles, Phytin, lecithin, oxycerotine, tyrosine, salicylic acid, and resins. The seed oil is also rich in glycerides of linoleic, oleinic, palmitin, and stearine acids. Omega-3 fatty acid was found to be present in pumpkin seeds; it helps to prevent artheriosclerosis, high blood pressure, and heart diseases; it also stimulates metabolism of accumulated fats. Oil-cake fats from pumpkin seeds contain large amounts of (almost 60%) of omega-3 acids twice that of cod liver oil. Pumpkin seed powder is used in China and the United States as an ingredient of salad dressings and in baked products. The seed oil is used as salad oil in Europe, and in India for cooking and lighting. The seed is used medicinally in the prevention of kidney stones. Seeds are eaten as an anthelmintic. In Mauritius an infusion of the seeds is used internally to treat hypertension and prostate complaints and externally to treat erysipelas.Seeds form a major part of the diet of Nigerians; They are consumed as a meal as well as ingredients of local soups. In southwestern Nigeria, pumpkin seeds are used locally as an alternative to “egusi” melon (Citrullus vulgaris Schrad) seed. Melon seeds are milled and used to prepare the popular “egusi” soup where they act as food thickeners. Pumpkin seeds are used alone or in combination with leafy vegetable.1.2 OBJECTIVE OF STUDYMain objective• The effect rate of fertilizer application on vegetable (telfairia occidentalis) Specific Objective
• To examine the chemical component of fertilizer
• To study the nutritional effect of fertilizer in telfairia occidentalisREFERENCES1. Horsfall MJr. and Spiff IA (2005). Equillibrium sorption study of AL3+ , CO2+ and Ag+ in Aqueous solutions by fluted pumpkin (Telfairia occidentalis Hook. F) waste biomass. Acta Chim. Slov., 52: 174-181.2. Akoroda MO (1986). Seeds dessication and recalcitrance in Telfairia occidentalis.Seed Science Tech., 14: 327.3. Schippers RR (2000). African indigenous vegetables: an over view of the cultivated species. Revised edition on CD- ROM. National Resources International limited, Aylesford, United Kingdom.