DefinePK

Abstract

The influence of Tryptophan on the growth, yield and quality of chilli with and without fertilizer was studied at AMK Research Farm Mardan, during 2019. The experiment was laid out in RCBD with a split plot arrangement having three replications. Factor-A consisted of two treatments i.e., fertilizers applied (100 kg N, 60 kg P2O5 and 25 kg K2O ha-1) and without fertilizer was assigned into main plots whereas, Factor-B was Tryptophan levels (0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mg L-1) which was allotted to sub-plots. It was revealed from the study that those plants which were treated with the application of NPK fertilizer; produced taller plants (80.88 cm), more branches plant-1 (7.44), stem diameter (1.67 cm), leaf area (51.88 cm2), early flowering (37.08 days), early fruit harvesting (58.88 days), maximum fruits plant-1 (293.06), least fruit drop (53.61 %), fruit weight (3.58 g), fruit yield (5.86 tons ha-1), total soluble solids (5.39 °Brix) and ascorbic acid contents (110.78 mg 100g-1). Tryptophan at 1.5 mg L-1 gave taller plants (85.87 cm), maximum branches plant-1 (8.85), stem diameter (1.70 cm), leaf area (57.71 cm2), earlier flowering (39.54 days), early fruit harvesting (57.16 days), more fruits plant-1 (318.17), least fruit drop (38.80 %), maximum fruit weight (4.13 g), fruit yield (7.25 tons ha-1), total soluble solids (5.60 °Brix) and ascorbic acid contents (115.33 mg 100g-1) of chilli. It was concluded that Tryptophan along with NPK fertilizer application produced better plant growth, fruit yield and quality of chilli, under the climatic conditions of Mardan.
Keywords: Chilli growth; NPK fertilizer; Tryptophan; Yield
http://dx.doi.org/10.19045/bspab.2021.100134