Effect Of Different Lights Used On Green Amaranthus Growth

The demand for vegetables in Malaysia is increasing. However, Malaysia does not have enough land to plant crops besides the price labor and pesticides also increasing. According to the data by FAMA, per capita consumption for vegetables recorded a steady increase of about 1% each year between 2009 and 2014. Therefore, one of the ways that can be used to produce more vegetables especially spinach, is by growing them using lights. Five different lights were used in this research to study the growth rate of green amaranth. The lights are white light, red light, blue light, yellow light and sunlight as a control variable. The model used is Philip with 35 watt each. The experiment is divided in to stage, germination stage and growing stage. After 15 days of planting the green amaranth or spinach, the results were obtained. Based on the results, red light is the most effective light for the growth of green amaranth as it shows red light has the highest growth rate. Besides, pH of 5.6012 is more effective compared to 7.0 and 8.0123. This can be seen when all aspects that were being studied show highest result for pH 5.6012