Chemical fertilizer enhances growth, yield and quality of two varieties of muskmelon (Cucumis melo L.)

This study aimed to investigate the effects of chemical fertilizer on the growth, yield, and quality of two varieties of muskmelon. A 2×4 split-plot design with four replications was employed. The factors included two Thai muskmelon varieties (Nan and Homlamon) and four chemical fertilizer rates: 1) no fertilizer (CF1), 2) N-P-K rate of 18.75-15-15 kg ha-1 (CF2), 3) N-P-K rate of 37.50-30-30 kg ha-1 (CF3), and 4) N-P-K rate of 56.25-45-45 kg ha-1 (CF4). The muskmelons were grown in loamy sandy soil on a farmer’s field from December 2023 to March 2024. Growth, yield, and quality parameters were measured. The results indicated that CF3 and CF4 significantly enhanced growth, yield, and quality parameters (e.g., total soluble solids and fruit firmness) in both varieties compared to other treatments. In terms of economic return, CF3 was recommended for the Nan variety, while CF4 was recommended for the Homlamon variety, as these treatments provided the highest economic returns. This study suggests that the two muskmelon varieties have different chemical fertilizer requirements for optimal performance.