scholarly works in Crop Protection & Environmental Biology

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Author: search.filters.author.Adejumo, S. A.Subject: search.filters.subject.Organic Fertilizer

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    The effect of cocoa pod husk as organic fertilizer on the growth of tea (Camellia sinensis (L) o. Kuntze) under varying light intensities in Ibadan – South West Nigeria
    (Mutagens., 2019) Adeosun, S. A.; Togun, A. O.; Adejumo, S. A.; Famaye, A. O
    Tea is one of the components of human diets due to its antioxidative properties and nutritive values. Light intensity and soil fertility are the major abiotic factors affecting the growth of tea (Camellia sinensis(L) O. Kuntze). Tea performs well under low light intensity and fertile soil. In Nigeria, tea production is predominant in Mambilla Plateau due to cool weather. To meet the increasing demand for tea, there is need for soil fertility improvement and expansion of the growing area of tea to the lowland ecology of Nigeria. A pot experiment was conducted in Cocoa Research Institute of Nigeria (CRIN), Idi-Ayunre, Ibadan, South-West Nigeria to assess the effect of varying light intensities and soil amendment with Cocoa Pod Husk (CPH) and NPK fertilizer on the growth and dry matter production of tea cuttings. Milled CPH fertilizer was applied at the rate, 75kgN ha-1 (13.39g pot-1), 150kgN ha-1 (26.79g pot-1) and 300kgN ha-1 (53.57g pot-1), and NPK 5:1:1 (150kgN ha-1) fertilizer while zero fertilizer served as control. The tea plants were grown under four different light intensities of 25, 45, 65 and 100% by using varying densities of palm fronds to cover the top and sides of the sheds. The results showed that CPH at 300kgN ha-1, 45% and 65% light intensities enhanced vegetative growth and dry matter accumulation in the tea plants. The 65% light increased the number of leaves, leaf area, number of branches, plant height, stem diameter and total dry matter by 188%, 400%, 14%, 30%, 21% and 620% respectively compared to the 100% light. The 45% light increased the number of leaves, leaf area, plant height, stem diameter and total dry matter by 155%, 369%, 21%, 16% and 656% respectively compared to the 100% light. CPH at 300kgN ha-1 increased number of leaves, leaf area, number of branches, plant height, stem diameter and total dry matter by 69%, 155%, 62%, 28%, 24% and 75% respectively compared to the control. When compared to the NPK fertilizer, CPH at 300kgN ha-1 increased number of leaves, leaf area, number of branches, plant height and total dry matter by 25%, 32%, 12%, 1% and 47% respectively. On interaction, tea cuttings grown under 45 and 65% light intensities and received CPH at 300kgN ha-1 produced significantly (P=0.05) higher number of leaves, leaf area, number of branches, root dry weight, stem dry weight, leaf dry weight and total dry matter; while 65% light interaction with NPK fertilizer enhanced significantly (P=0.05) higher plant height and stem diameter.
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    Effect of varying rates of commercially produced organic fertilizer on the growth and fibre yield of kenaf (Hibiscus cannabinus L.).
    (African Journals OnLine (AJOL) platform, 2016) Olanipekun, S. O.; Togun, A. O.; Adejumo, S. A.; Adeniyan, O. N.
    Hibiscus cannabinus L. or kenaf is a fast growing and multipurpose annual crop planted for its horticultural and economie importance. Little is known about its response to different rates of organic fertilizer in Nigeria. The objective of thè study was therefore to evaluate thè effeets of different rates of commercially produced organic fertilizer (Aleshinloye organic fertilizer to be precise) on crop growth rate, vegetative growth and biomass accumulation in kenaf Five different rates of organic fertilizer equivalent to: 0, 70, 100, 130 and 160 kg N ha'1 replicated three times were used in a randomized complete block design (RCBD). There were contrasting results on thè effects of fertilizer rates on growth and physiology of kenaf. Significant effects were observed for some agronomie parameters such as plant height, stem diameter and fibre yield. The application of organic fertilizer at varying rates increased thè bast fibre yield of thè Ifeken 400 variety of kenaf troni 67.29 g/m2 (control) to 98.70, 147.88 and 157.40 g/ni2, in those grown on soil amended with 70, 100 and 130 kg N ha'1 of organic fertilizer respectively. Organic fertilizer could be utilized for thè cultivation of kenaf in Nigeria but thè rate to apply depends on thè nutrient content of thè organic fertilizer.