The addition of different starters on characteristics Sargassum sp. liquid fertilizer

Abstract

Sargassum sp. is a macroalgae contains of nutrients and stimulating plant growth regulators that can be used as organic fertilizer. The purpose of the study was to determine the effect addition of three different starters to the seaweed liquid fertilizer on producing C-organic, nitrogen, phosphorus, potassium, pH on Sargassum sp seaweed for organic fertilizer. The addition of different starters were to enchanced fermentation process. Seaweed were chopped and dried for around 2 days, lamtoro leaves as source of nitrogen compound was added for 25% of total amount of seaweed. Water was added to the mixture and then fermented for 14 days with addition of 3 different type of starters namely bread, tape and tempe starter. The data were then analysed by ANOVA and Tukey test in order to know which treatments were different. The result showed that the addition 3 different starters gave differences on pH and yield, total solid content, macronutrient and micronutrient of organic fertilizer. The addition of bread starter to seaweed gave the highest N content (2.7%), pH (5.43), yield (50.44%) and total solid content (94.36), while seaweed fertilizer added with tempe starter gave the highest micromineral content Fe (38.77 ppm), Zn (4.2 ppm) and Mn (4.74 ppm).