Browsing by Author "Ogunniyan, D. J."

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    Influence of different fertilizer application rates on growth and yield components of two maize varieties in a forest-savannah-transition agro - ecology zone
    (Faculty of Agriculture, University of Port Harcourt, Rivers State, Nigeria., 2018) Anjorin, F. B.; Adejumo, S. A.; Adediran, J. A.; Adebayo, A. K.; Ogunniyan, D. J.; Olanipekun, S. O.
    Field study on the influence of fertilizer application on growth and yield components of maize was carried out in 2015 and 2016 at the Institute of Agricultural Research and Training (I.A.R&T), Ibadan Station. Two maize varieties (ILE-1-OB and TZPBSR-W) were evaluated under three rates of NPK 20-10-10: 0, 50 and 100 kg N ha-1, one rate of Tithonia compost; 10 t ha-1 (representing 10.7 kg N ha-1) and two rates of NPK and Tithonia compost combinations (50 kg N ha-1+10 t ha-1 and 100 kg N ha-1+10 t ha-1) using randomized complete block design (r=3) arrangement. Selected maize plants were assessed for plant height (cm), leaf area (cm2), stem diameter (cm), number of ears per plant, number of rows per cob, number of kernels per row, number of kernels per cob, 1000-kernel weights and grain yield. Various growth and yield components evaluated increased significantly with increased fertilizer application. Combinations of 50 kg N ha-1+ 10 t ha-1 and 100 kg N ha-1+10 t ha-1 enhanced growth and yield performances of maize better than sole applications of 50 or 100 kg N ha-1. Highest grain yield was obtained under 50 kg N ha-1 +10 t ha-1 (5.26, 5.82 t ha-1) and 100 kg N ha-1 + 10 t ha-1 (5.78, 5.91 t ha-1) in 2015 and 2016 respectively. The use of 50 kg N ha-1 inorganic fertilizer in combination with 10 t ha-1 (10.7 kg N ha-1) Tithonia compost adequately enhanced growth and yield performance of maize in the Forest-Savannah-Transition agro - ecology zone of Nigeria.
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    Seedling establishment, biomass yield and water use efficiencies of four maize varieties as influenced by water deficit stress
    (Ion Ionescu de la Brad University of Life Sciences in Iași, 2017) Anjorin, F. B.; Adejumo, S. A.; Are, K. S.; Ogunniyan, D. J.
    Water stress is one of the major abiotic factors affecting crop growth and development at every growth stages. Effects of water deficit on the vegetative growth stage of four maize varieties consisting of two Quality Protein Maize varieties (ILE1OB and ART98SW6OB) and two drought tolerant checks (TZPBSR and DTESTRSYN) were evaluated under the screen house conditions at the Institute of Agricultural Research and Training (I.A.R & T), Moor Plantation, Ibadan. Maize seeds were sown in 20 L plastic pots filled with 15 kg top soil, which were subjected to four watering regimes of 25, 50, 75 and 100% field capacities (FC). The experimental design was a 4 x 4 factorial fitted into CRD with four replications. Data were collected on days to germination, number of leaves per plant, leaf area, plant height, stem diameter, leaf extension rate, biomass yield and water use efficiency. The result showed that days to germination were prolonged as the moisture availability decreases, while water use efficiency increased as the moisture level reduced. Reduction in moisture availability caused significant reduction in the other evaluated parameters. At 25% FC DTESTRSYN was superior in leaf area, number of leaves per plant, days to germination and water use efficiency, TZPBSR had highest values for stem diameter and biomass yield, while ILE1OB was superior in plant height, stem diameter, leaf and stem extension rate. ILE1OB competes favourably with the drought tolerant checks and performed better than ART98SW6OB. Adequate moisture condition is fundamental for normal growth and development in maize crops.