EFFECTS OF VARIETY AND FERTILIZER TYPE ON PHYSICO-CHEMICAL COMPOSITION OF SWEET CORN (Zea mays L. saccharata Sturt) KERNEL
Keywords:
Zea mays var, fertilizer treatment, sweet corn kernel quality, sweetnessAbstract
The sugar content of sweet corn kernel is influenced by variety and harvest time. This research investigated the effects of variety and fertilizer type on the physico-chemical composition of sweet corn kernel. The field experiment was conducted between April and June, 2024 at Agricwas Farm, Aboke village, Lagelu Local Government Area, Oyo State, Nigeria, while the post field experiment was conducted at the Department of Horticulture Laboratory, Federal University of Agriculture, Abeokuta, Nigeria. There were two factors: variety (Sugar King F1 and Royal Hybrid) and fertilizer type of Poultry manure (40 t/ha), NPK 15:15:15 (100 kg N/ha), complimentary poultry manure and NPK fertilizer (½ NPK 15:15:15 + ½ poultry manure) and No fertilizer. The experiment was arranged in Randomized Complete Block Design fitted into split plot arrangement, with three replicates. Sweet corn harvested at milk stage (65 days after planting) were placed in a plastic crate and taken to the laboratory for physico-chemical analysis. Sugar King F1 and Royal Hybrid variety of sweet corn kernel had similar moisture, dry matter, fat, ash, crude fiber, crude protein and carbohydrate contents. However, Sugar King F1 had higher total soluble solids, total Sugar and starch contents when compared with Royal Hybrid variety of sweet corn. Sweet corn kernel fertilized with ½ NPK 15:15:15 + ½ Poultry manure had the highest dry matter, crude protein, and carbohydrate contents when compared with sweet corn kernel fertilized with sole poultry manure, sole NPK 15:15:15 and no fertilizer treatments. Sweet corn kernel treated with sole poultry manure had higher total soluble solids and total sugar while the unfertilized sweet corn had the highest starch content. Variety and fertilizer type had no influence on the Light, Hue and Chroma colour values of the sweet corn kernel. Sugar King F1 kernels were sweeter than Royal Hybrid kernel; both varieties had similar colour at harvest; Sugar King F1 variety of sweet corn fertilized with 40 t/ha poultry manure were the sweetest.
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