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Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2021 ASABE Annual International Virtual Meeting  2101086.(doi:10.13031/aim.202101086)
Authors:   Temitayo Abayomi Ewemoje, Prof., Habeeb Adedotun Alabi, Engr., Isaac Oladeji Lebi, Afeez Adewale, Sefiu Abiodun Tiamiyu, Joshua Oluwadamilare Oyelayo
Keywords:   Corchorus olitorius, Crop growth, irrigation scheduling, Jute mallow, Light intensity reduction.

Abstract. Researchers has worked on supplemental lighting and photo-selectiveness of different colours on fruits/vegetables but little/no attention on effects of reduced light intensity on plant growth. Hence, the study was designed to investigate significance of light reduction and irrigation scheduling effects on Corchorus olitorius. Randomised Complete Block Design was used. Irrigation treatments (25%, 50%, 75%, and 100% FC) were applied and light irradiance was reduced to 20% (1,242Lux to 248Lux). Growth parameters were measured weekly and biomass yield determined at 6-Weeks-After-Planting (WAP) for two dry seasons. Irrigation treatments of 100%, 75%, 50% and 25% FC amounted to 4.64mm, 3.45mm, 2.3mm and 1.15mm with an average yield of 2.49g, 1.90g, 1.66g and 1.45g per stand respectively for shaded field. Average yield of 2.11g, 1.28g, 0.95g and 0g for 100%, 75%, 50% and 25% FC respectively for open field. Crop growth parameters and yields indicated significant differences between shaded and open beds (P<0.05) when 25% FC treatment was compared to 50% FC and/or 75% FC and/or 100% FC for shaded and open beds. Biomass yield showed no significant differences between shaded 100% FC, open 100% FC and shaded 75% FC. At harvest (6-WAP), there is significant difference between 100% and 75% FC; 50% and 25% FC, and no significant difference between 75% and 50% FC for open field. The 100% FC with light reduction should be considered for Jute maximum yield. If scheduling is to maximize yield/depth of water, preference should be given to 75% FC with reduction of light intensity.

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