Effect of, NH4 sup + [Ammonium] :NO3 sup - [nitrate] ratios on the yield, fruit quality, and leaf nutrient composition of hydroponic cultured chili pepper (Capsicum frutescens L.)
2023
Madrid, M.C. | Ocampo, E.T.M. | Sanchez, P.B. | Lalusin, A.B. | Esguerra, E.B.
The study was conducted to evaluate the effectiveness of modified nutrient solutions under a hydroponic growing system towards enhancing the yield and quality of fruits on chilli peppers. The selected wick system and Pinatubo F1 cultivar were used to test the effect of different ammonium and nitrate nutrient ratios on the yield and quality of chilli pepper fruits. The ammonium and nitrate nutrient ratios utilized are 20:80 (1.84 % w/w of NH4 sup + :7.5 % w/w of NO3 sup - ) and 25:75 (2.215 % w/w of NH4 sup +: 7.5 % ww of NO3 sup +; ), while the control treatment is the original formulated nutrient solutions. The study was set up at Tuntungin Putho, Los Baos, Laguna [Philippines], under greenhouse conditions from May 1 to September 12, 2022. It was laid out in a completely randomized design (CRD) with three replications. The data were analyzed using the STAR Software package and the LSD test for mean comparison. The ratio of 20:80 ammonium to nitrate in the nutrient solutions of hydroponic cultured chilli peppers increased the fresh fruit weight, lengthened fruits, and obtained a greater number of seeds per fruit. Ammonium increased the accumulation of calcium in the leaf of a hydroponic cultured chilli pepper, while zinc increased only at a 25:75 ratio of ammonium and nitrate. Hydroponic-grown chilli peppers had increased vitamin C, while ammonium in nutrient solutions decreased total sugar. Flavonoids, phenols, and pungency of chilli pepper fruits were not affected by NH4 sup +/NO3 sup - ratio. Research is needed to validate the results, considering greenhouse temperatures and water quality.
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