Optimization of Application of Various Types and Doses of Foliar Liquid Fertilizers on Growth and Yield of Pak Choy (Brassica rapa)

Abstract

Pak choy is a highly favored vegetable with a high market value. The continuous urban land conversion requires agricultural innovations such as hydroponic cultivation. Nutrients play a crucial role in determining the success of hydroponic cultivation, which in turn affects plant growth and yield. Although AB mix is commonly used in hydroponics, its high cost necessitates the exploration of alternative liquid foliar fertilizers. This study was conducted at Arif Hydrofarm, Padang City, to determine the interaction between the types and doses of liquid organic fertilizers on the growth of pak choi plants. A split-plot design was employed, with the main plot consisting of different liquid organic fertilizers (Ferti Grow, Good Grow, and NPK Vertine) and subplots consisting of fertilizer doses (20 ml/L and 25 ml/L). Data were analyzed statistically using the 5% LSD test. The results showed no significant interaction between the type and dose of liquid foliar fertilizers on the growth and yield of hydroponically grown pak choy. However, Good Grow fertilizer at a dose of 20 ml/L produced the best results in terms of plant height, shoot-to-root ratio, number and density of stomata, as well as stomatal length and width, compared to Ferti Grow and NPK Vertine.